yFiles for Java (Swing) Changelog

Bug Fixes

Cactus Group Layout

• The CactusGroupLayout class no longer places node labels when IntegratedNodeLabelingEnabled is false.

View

• Fixed cleanup of CanvasComponent that prevented the component from being garbage collected after removing it from the component hierarchy.

GraphML

• Fixed deserialization of string arrays that contain empty strings.

Hierarchic Layout

• The HierarchicLayout class no longer assigns superfluous space to group nodes if there are grouped edges.
• The HierarchicLayout class no longer produces an error when using a non-zero grid distance in combination with incremental mode's exact coordinate hints.
• The HierarchicLayout class no longer produces superfluous crossings between backloops or same-layer edges in the first or last layer.
• The HierarchicLayout class no longer produces superfluous crossings for tabular group nodes with fixed children order.
• The HierarchicLayout now properly handles self-loop edges when the edge is at a group node and furthermore edge/port grouped with the same ID on both sides. Previously, it was not routed correctly or that it was removed from the LayoutGraph instance when running the layout algorithm directly on the graph instance without using a copy.
• The HierarchicLayout class no longer swaps the position of fixed nodes in incremental layout mode with user-specified sequence constraints.
• Rare combinations of PortCandidates in PortCandidateSets no longer result in exceptions.

Tree Layout

• The AspectRatioNodePlacer class no longer ignores the specified AspectRatioNodePlacer#FillStyle for some specific setups (e.g., if all children are leaves and have the same size).

Orthogonal Layout

• The OrthogonalLayout class no longer throws an exception for some input graphs with tree substructures when the TreeStyle is set to a value different from TreeLayoutStyle#NONE.

Edge Router

• When routing edges to and from fixed ports in the interior of group nodes, other nodes in the group are not ignored anymore, so that the edge does not overlap them if possible.
• The EdgeRouter class does no longer yield different results in rare cases when the same instance is applied twice to the same input graph.
• The EdgeRouter class no longer produces self-crossing routes of edges with labels if IntegratedEdgeLabelingEnabled property is true.

Partial Layout

• The PartialLayout class does no longer yield different results in rare cases when the same instance is applied twice to the same input graph.
• The PartialLayout class now correctly places disconnected components for cases where a layout orientation is specified, and the ComponentAssignmentStrategy property is not ComponentAssignmentStrategy#SINGLE. Previously, such components were sometimes placed far away from the remaining graph elements.

Algorithms

• The Intersections class does not dispose FilteredGraphWrapper instances that it is given with no subgraph nodes or edges specified anymore. Previously, this caused the graph instance to become defunct resulting in all kinds of functionality running into null fields and properties.

Analysis

• The ShortestPaths class now correctly calculates the k-shortest paths of graphs (see methods ShortestPaths#KShortestPaths and ShortestPaths#KShortestPathsCursor). Previously, in rare cases, the algorithm sometimes produces wrong results, i.e., returns paths that are not the shortest.

This release brings exciting new major features, and many other minor new features, improvements, and bugfixes to all parts of the library. As always, there are new and improved demos demonstrating these features and improvements.

If you are updating from an older version of yFiles for Java (Swing), have a look at the list of incompatible changes.

Major new features

New styles for graph items

The RectangleNodeStyle class is a new node style that uses a rectangular shape whose corners are either rounded or cut diagonally. Its properties specify which corners get rounded, the corner radius, its fill, and its border stroke.

The new GroupNodeStyle class is a node style primarily designed for collapsed and expanded group nodes. It draws a (rounded) rectangle with an optional tab or ribbon, and offers extensive configuration options for an optional icon, its various fills, and paddings. The new GroupNodeLabelModel is tailored to place labels in the tab or tab background of a GroupNodeStyle.

The new ArrowNodeStyle class draws a node as an arrow shape. The arrow can point in one of the four compass directions, and the arrow head slope, the shaft thickness, the fill, and the border stroke can be configured.

Similarly, the new ArrowEdgeStyle class draws an edge as an arrow shape. This style always points from the source port to the target port, ignoring bends, and can be configured in the same way as the node style.

The DefaultLabelStyle class now supports different common background shapes.

The ShapeNodeStyle class now supports three additional shapes: HEXAGON2 (a six-sided polygon with tips at top and bottom), STAR5_UP (a five-pointed star with one tip pointing upwards), and PILL (a stadium shape with the shorter sides rounded).

Its new property KeepingIntrinsicAspectRatioEnabled defines whether to keep the intrinsic aspect ratio of the shape.

The new BridgeEdgeStyle class renders an edge as a 3-segment bridge with a given height between the edge's source and target port locations. This is especially useful to distinguish parallel multi-edges between the same pair of nodes.

Wrap text to shape

The text wrapping feature of DefaultLabelStyle now wraps the text inside a given shape instead of just the rectangular label bounds. The TextWrappingShape enum provides the predefined shapes, and includes for example pill, ellipse, and hexagon. The new DefaultLabelStyle.TextWrappingPadding property defines the padding between the chosen shape and the text.

If the predefined shapes don't fit your needs, you can override the DefaultLabelStyleRenderer.getTextWrappingOutline method to return any custom convex path as GeneralPath instead.

Compact disk layout

The new CompactDiskLayout class arranges a graph on a disk, packing the nodes as dense as possible. This layout is mostly suitable for graphs with small components whose loosely connected nodes should be grouped and packed in a small area.

The associated new class CompactDiskLayoutData allows to specify custom data considered during the layout calculation.

Cactus group layout

The new CactusGroupLayout class offers an alternative representation of hierarchically nested data. It places the children of a group along the groups circular border, resembling the structure of a cactus.

The associated new class CactusGroupLayoutData allows to specify custom data considered during the layout calculation.

New Features

View

• The new class PortLocationModelParameterSerializer provides static helper methods which can convert the built-in IPortLocationModelParameter implementations into key-value pairs. It also supports creating IPortLocationModelParameter instances from these key-value pairs.
• Added the new property AspectRatio to the GeneralPathNodeStyle which defines the aspect ratio of the path.
• The new property CanvasComponent#MouseWheelZoomEventRecognizer can be used to set the modifier for distinguishing between mouse wheel scrolling and zooming.
• The new class LabelModelParameterSerializer provides static helper methods which can convert the built-in ILabelModelParameter implementations into key-value pairs. It also supports creating ILabelModelParameter instances from these key-value pairs.
• The methods getNodesRevealedAfterExpand, getEdgesChangedAfterExpand, and getEdgesChangedAfterCollapse have been added to FoldingManager. They can be used to retrieve information about folding states that would be used when a specified group node would be expanded or collapsed.

Interaction

• Handles can now react to mouse click events. The handleClick method has been added to the IHandle interface and is called when HandleInputMode#ClickedRecognizer was triggered on a targeted handle. To customize the general handle click handling, the Clicked event can be listened to or the method HandleInputMode#handleClick can be overridden.

Hierarchic Layout

• The HierarchicLayout class now supports so-called tabular group nodes. The children of such groups are arranged in a compact tabular fashion (i.e., like a single column table for layout orientation left-to-right). Property HierarchicLayoutData#TabularGroups allows to mark groups as "tabular" and property HierarchicLayoutData#TabularGroupChildComparators to specify a custom order for the children.

Organic Layout

• The OrganicLayout class now offers the possibility to define a group substructure scope, see property GroupSubstructureScope. Group substructures that lie in the specified scope are treated as substructures in the layout process, i.e., the child nodes are arranged on a disk that is contained in the group node.
• In addition, the new property ClusterAsGroupStructureAllowed allows to specify whether or not detected clusters (see property ClusteringPolicy) are taken into account as group substructures.
• The OrganicLayout class now offers two new ChainSubstructureStyles called DISK and DISK_NESTED that lead to a compact disk-like layout for chains.
• The OrganicLayout class now offers the possibility to define tree substructures (stars, chains, cycles and parallel structures are already supported). The OrganicLayout#TreeSubstructureStyle property specifies the style of tree substructures and the OrganicLayout#TreeSubstructureSize property specifies their minimum size (structures of smaller size are not handled as a tree substructure).

Balloon Layout

• The BalloonLayout class now supports node types. The types influence the ordering of child nodes and the subtrees rooted at them such that nodes of the same type are preferably placed next to each other. Node types are weaker than a user-specified custom order defined via a comparison function. Types can be defined via the BalloonLayoutData#NodeTypes property.

Radial Layout

• The RadialLayout now supports a new layering strategy that produces a circular dendrogram drawing.
• The RadialLayout now supports two new edge routing styles, namely a radial polyline style and a curved style. The radial polyline style produces edge paths which consist of a series of straight and arc segments. The curved polyline style routes the edges as curved bezier paths. In the latter case, the edge paths can be also returned as control points that represent cubic bezier control points.
• The RadialLayout now supports integrated node labeling i.e., the node labels are taken into consideration when determining the positions for the nodes of the graph and guarantees that labels will not overlap with other objects in the graph.

Circular Layout

• The CircularLayout now supports integrated node labeling i.e., the node labels are taken into consideration when determining the positions for the nodes of the graph and guarantees that labels will not overlap with other objects in the graph.
• The CircularLayout class now supports curved edge routing within and between circles.

Analysis

• Added the new RankAssignment analysis algorithm class that solves the rank assignment problem on an acyclic graph using the simplex method.
• The new analysis class Intersections finds intersections and overlaps between graph items, featuring flexible configuration options to find only specific intersections. The respective com.yworks.yfiles.layout.Intersections class provides the functionality also for the LayoutGraph API, but offers less convenience.

Improvements

General

• The documentation about configuring the item visualization has been improved. All styles and their configuration options are now described in a Developer's Guide chapter.

View

• GraphClipboard now respects the PasteDelta value when pasting items without owner (e.g. edges without selected source or target node).
• ModelManager and its derived classes HighlightIndicatorManager, SelectionIndicatorManager, and FocusIndicatorManager now have install and uninstall methods for properly allocating and freeing resources when setting or removing a manager to a CanvasComponent.
• GraphModelManager: the properties NodeManager, EdgeManager, PortManager, EdgeLabelManager, NodeLabelManager, PortLabelManager, and ProvideUserObjectOnMainCanvasObject have been made public.

Interaction

• The MoveViewportInputMode#uninstall method is now virtual and can be overridden in derived classes.
• A SizeConstraintProvider property was added to NodeReshapeHandleProvider and NodeReshapeHandlerHandle that is queried during node resize gestures if no explicit MinimumSize, MaximumSize or MinimumEnclosedArea is set.
• The input modes don't perform hit tests upon auto-repeated key down events for modifier keys anymore.
• Cursor property changes of active input modes are now immediately reflected in the application's mouse cursor. Previously, the application mouse cursor might have been updated only after the next mouse event.
• The new MoveInputMode#ValidBeginCursor property offers the possibility to use different cursors for signaling a valid position for beginning a move operation and actually moving items.
• The ResizeStripeInputMode class now offers the possibility to customize the cursors for signaling a valid position for beginning a resize operation as well as actually resizing columns or rows.
• The ResizeStripeInputMode class now offers properties to set an invalid end cursor for column and row resize. The invalid end cursor is shown during resize operations if the column or row in question cannot be resized to the current mouse position.
• The properties ValidBeginRecognizer and ValidBeginCursor have been added to LassoSelectionInputMode, MarqueeSelectionInputMode, and MoveViewportInputMode. The ValidBeginRecognizer can be used to indicate whether the selection respectively move viewport gesture may begin in which case the ValidBeginCursor is used.
• The property MouseHoverInputMode#ValidHoverLocationCursor has been added that is used when the ValidHoverLocationHitTestable returns true for a location.
• The property PopupMenuInputMode#ValidMenuLocationCursor has been added that is used when the ValidMenuLocationHitTestable returns true for a location.
• IReparentNodeHandler#isValidParent is now also called with null as new parent during the drag gesture if no real parent node has been tested for the location.
• Keyboard navigation with NavigationInputMode now always considers the current item to navigate from, regardless of the value of the NavigableItems property.
• The GraphClipboard now raises the events ElementsCutting, ElementsCopying, ElementsPasting, and ElementsDuplicating at the very beginning of the cut, copy, paste, and duplicate methods.
• GraphEditorInputMode now raises the GroupingSelection and GroupedSelection events at the start and end of the groupSelection method. Similarly, the UngroupingSelection and UngroupedSelection events are raised at the start and end of ungroupSelection method.
• The new CreateEdgeInputMode#SourceNodeDraggingCursor property offers the possibility to customize the cursor that is shown while the mouse is still over the source node after starting the edge creation.
• Changes to ItemHoverInputMode's HoverCursor property now take effect immediately if the mouse pointer is currently hovering over an item.
• The TextEditorInputMode now releases the mutex before dispatching the TextEdited event.
• CanvasComponent now has a CursorChanged event that can be used to react to cursor changes (which happen primarily when input modes change it).

Styles

• The Pen#DashStyle property is now marked as @Nonnull, since several internal usages assumed that to be the case anyway. In addition, the documentation of the DashStyle#Dashes property now clarifies that both an empty collection and null result in a solid Pen.
• Added a new property KeepingAspectRatioEnabled to ImageNodeStyle and MemoryImageNodeStyle to support keeping the image's aspect ratio during resizes.
• Nodes rendered with the ShapeNodeStyle now respect their actual outline shape when selected with the LassoSelectionInputMode.

GraphBuilder

• GraphBuilder now offers simplified access to a node/edge that has been created with a given ID or data item or accessing the data a node/edge has been created for via the new methods getNodeById, getNodeForItem, getDataItem(INode), getEdgeById, getEdgeForItem, and getDataItem(IEdge).
• TreeBuilder and AdjacencyGraphBuilder now offer simplified access to a node that has been created with a given ID or data item or accessing the data a node/edge has been created for via the new methods getNodeById, getNodeForItem, getDataItem(INode), and getDataItem(IEdge).

Hierarchic Layout

• The HierarchicLayout class now allows to combine the SimplexNodePlacer#StraightenEdges and SimplexNodePlacer#BarycenterMode properties. Previously, edge straightening was not supported in barycenter mode.
• The HierarchicLayout class generates more compact results for some cases with edges between nodes of the same layer and integrated edge labeling where previously unnecessarily large distances to the label and edge were kept.
• The HierarchicLayout class now places nodes without any edges as far left as possible without violating any constraints. That way they do not disturb the layout for the connected part of the graph.
• For input graphs with a PartitionGrid structure, the HierarchicLayout class now correctly considers the layering produced by the FromScratchLayerer if it is already compatible with the specified grid structure. Previously, for such cases, the algorithm may have calculated an entirely different layer assignment.
• The HierarchicLayout class now considers the flow direction to place the ports of port groups when combined with direct group content edges.
• The HierarchicLayout class comes with an improved support for subcomponent layouts (see HierarchicLayoutData#Subcomponents). Defining subcomponents now works by assigning instances of the new SubcomponentDescriptor class to nodes so that nodes mapped to the same descriptor instance form a component. Components that have inter-edges only to a single non-component node are now integrated directly at that node when using the new placement policies SubcomponentPlacementPolicy#AlwaysIntegrated or SubcomponentPlacementPolicy#Automatic (and if the orientation of the sub-layout permits it). The overall results for such cases feature better edge routing quality and more compact drawings.
• The HierarchicLayout class now also considers layering constraints between elements of different grouping hierarchies if the recursive group layering is enabled (property HierarchicLayout#RecursiveGroupLayering). Previously, such constraints were ignored in that case.
• The HierarchicLayout class now uses a more compact layer placement for graphs with edge labels between layers.
• The HierarchicLayout class now requires fewer bends for some inputs with grouped edges and port constraints or port candidates.

Organic Layout

• The OrganicLayout class now produces stable results for inputs with node labels and in deterministic mode, where it previously could generate a slightly different arrangement when applied twice with the same parameters.
• The OrganicLayout class now allows to specify custom node clusters by setting the ClusteringPolicy property to ClusteringPolicy#USER_DEFINED. The custom cluster IDs have to be specified by means of the OrganicLayoutData#ClusterIds property.

Circular Layout

• The CircularLayout class now supports node types (see CircularLayoutData#NodeTypes) also for the layout of the cycle partitions. Previously, the types had an influence only on the layout of a partition itself. If all nodes of a partition are of the same type, then the partition gets that type as well, so that partitions of same type are preferably placed next to each other.
• The CircularLayout class has received a faster algorithm for calculating edge bundles.

Tree Layout

• Root Alignment in GenericTreeLayout can also factor in the port position to straighten out an edge.
• The TreeLayout class now also supports integrated edge labeling for configurations that use a LayeredNodePlacer.

Edge Router

• The EdgeRouter class now produces better results for some setups with monotonic path restrictions and edges with vertically/horizontally overlapping endpoints.
• The EdgeRouter class now tries to avoid routes that cross fixed external ports of other edges as well as fixed internal ports at group nodes of other edges. The new property PenaltySettings#PortCrossingPenalty allows to specify the cost of such crossings.
• The EdgeRouter class now supports buses that include self-loops (see class BusDescriptor). Previously, self-loops were ignored.

Generic Labeling

• The generic labeling algorithm has an additional preset to avoid overlaps of labels and the partition grid.

Layout

• Improved the initialization time and memory consumption of layout animations.
• The TemporaryGroupNodeInsertionStage class now automatically marks inserted group nodes with an IDataProvider registered to the input graph with the key INSERTED_GROUP_NODE_DPKEY.
• The TemporaryGroupNodeInsertionStage class now also supports specifying hierarchically nested temporary groups. Therefore, the new TemporaryGroupDescriptor class has been added.

Analysis

• The TraversalDirection enumeration used by the Neighborhood and Bfs algorithms has been extended. The enum value UNDIRECTED has been added that ignores the edge direction and corresponds semantically with the previous value BOTH. The semantic of BOTH has been adjusted to indeed return the union of the SUCCESSOR and the PREDECESSOR results. To keep the default behavior of the Neighborhood and Bfs algorithms, the default value of their TraversalDirection property has been changed from BOTH to UNDIRECTED.
• The GraphStructureAnalyzer class now supports operating on a subset of the graph.
• The new SubgraphNodes and SubgraphEdges properties on the Reachability class allow to define a subset of nodes/edges the algorithm should operate on.

Bugfixes

View

• Combining HierarchicNestingPolicy#GROUP_NODES, LabelLayerPolicy#AT_OWNER and undo no longer throws a NullPointerException.
• Viewport animations no longer suddenly stop when the zoom level is near CanvasComponent#MinimumZoom or MaximumZoom.
• Holding down a scrollbar button no longer scrolls beyond the scrollable area indicated by this scrollbar.
• Changing the ICanvasObject#Group property no longer triggers unnecessary recreation of the visuals anymore.
• Fixed a bug in SelectionIndicatorManager that didn't call removeSelection when an item was deselected.
• Changing the GraphComponent#GraphModelManager property no longer leaks memory in certain situations.
• Calling IFoldingView#collapse on a normal (i.e. non-group) node no longer creates an UndoUnit or a view state (which included an unexpected call to IFolderNodeConverter#initializeFolderNode even though the result would have never been used). Now calling IFoldingView#collapse on a normal node does nothing.
• The automatic flipping behavior of labels now also works with projections that distort the labels.
• ViewportAnimations now are properly cleaned up on cancel.
• GroupNodeStyle's associated INodeInsetsProvider now correctly calculates insets for “small” nodes, i.e. nodes whose height (or width) is less than the style's TabHeight property.
• Inertia in MoveViewportInputMode no longer stops working randomly.

Graph

• Fixed a bug in FilteredGraphWrapper's NodeRemoved event where the provided old parent might have been present in the wrapped graph but not in the filtered graph.
• The FilteredGraphWrapper class now raises the correct events when filtering out port labels. Previously, the events contained incorrect owner information.
• EdgePathLabelModel's findBestParameter method now creates correct parameters for locations close to bends.
• NinePositionsEdgeLabelModel center placements above and below the edge have been improved when the angle wasn't close to one of the two coordinate axes and the distance was non-zero. Previously, labels could seem to jump around when the path changed and weren't always close to the center of the path.
• GroupNodeLabelModel no longer stretches tab labels and tab background labels into the collapse/expand icon of the corresponding GroupNodeStyle.
• NavigationInputMode#ExpandGroup, EnterGroup, and the EXPAND_GROUP and ENTER_GROUP commands do not create empty undo units anymore if nothing has changed.
• NavigationInputMode#ExitGroup and the EXIT_GROUP command now create undo units if the bounds of the exited group node were adjusted.
• GroupingSupport's methods enlargeGroupNode and enlargeAllGroupNodes do not create empty undo units anymore if nothing has changed.
• EdgePathLabelModel, EdgeSegmentLabelModel, and SmartEdgeLabelModel findBestParameter implementations now create correct parameters for label boxes that overlap the edge's source or target node.

Interaction

• After pasting, a closed group node within another closed group now stays closed. Previously, it was open due to a bug in the GraphClipboard class.
• The GraphEditorInputMode#AdjustContentRect method now only updates the CanvasComponent#ContentRect property once per call. Previously there have been circumstances where the property would have been updated twice unnecessarily.
• The TableEditorInputMode class no longer changes the GraphComponent#Selection property unnecessarily when the GraphComponent#Graph property is changed.
• An instance of the HandleInputMode class is no longer canceled if a handle is removed during its own DragFinished call. This fixes some very rare exceptions under complicated circumstances.
• Multiple DropInputMode instances now correctly consider their respective priorities.
• UndoEngine no longer adds an empty undo unit for an aborted operation in certain rare cases.
• Fixed an issue where changing the GraphComponent#InputMode while the context menu is open would lead to a crash.
• Fixed a bug in MoveViewportInputMode that caused the inertia feature to mistakenly start moving the viewport after the mouse pointer has stopped before being released.
• Starting a CanvasComponent/GraphComponent viewport animation now properly stops a running MoveViewportInputMode inertia animation.
• The direction of the first edge segment during orthogonal edge creation is now correctly determined when the source port candidate lies on the node border.
• SmartEdgeLabelModel now properly supports the original position snap line.

Styles

• Cloning an ITable instance now properly clones all of the table's internal state. Previously, changing a cloned table's insets could result in the cloned table's stripes not updating their geometry.
• TableNodeStyle now allows the table background style to access the table node's tag.
• The built-in styles with rounded corners now have the correct outline shape for all calculations.
• Edges with Bézier paths can now also be animated into non-Bézier paths.
• Edge cropping now works as expected when using the BezierEdgeStyle class and the terminating nodes have styles that do not provide an outline in their IShapeGeometry implementation.
• GroupNodeStyle's collapse/expand icon can now be reliably hit in all cases. In rare cases, changing the value of one the properties that affect the icon's location were not taken into account for hit tests.
• ShapeNodeStyleRenderer now always uses the protected getPaint and getPen methods for all shapes instead of falling back to the respective style properties for some shapes.
• IconLabelStyle's updateVisual implementation now properly updates if the style's Icon instance is changed.
• DefaultLabelStyle now adds ellipsis more reliably at the end when the text does not fit into the specified text wrapping shape.

GraphML

• The key parameter of AbstractInputHandler#setValue method is now annotated correctly as nullable. The key may be null when the model item used as key is created after its data has been parsed.
• Fixed GraphML serialization and deserialization for certain configurations of GeneralPathNodeStyle and ShapeNodeStyle.
• Fixed GraphML serialization and deserialization for certain configurations of GroupNodeStyle and RectangleNodeStyle.
• Fixed an issue in GraphMLIOHandler's WriteEvents where the DataWriting event has been dispatched after the writing process instead of before.

GraphBuilder

• Label bindings which don't provide label data (or null) no longer add empty labels. Instead, no label will be added.
• Fixed a potential memory leak in AdjacencyGraphBuilder. Some internal references were not cleaned up after items have been removed during updateGraph.
• Fixed a bug in GraphBuilder where updating an existing edge whose (new) source or target nodes cannot be resolved did not remove the edge from the graph.
• Fixed a potential memory leak in GraphBuilder, AdjacencyGraphBuilder, and TreeBuilder. Some internal map entries for labels were not discarded after their owner nodes or edges were removed.

Table

• Fixed a bug in StretchStripeLabelModel that was causing incorrect handling of insets.

Hierarchic Layout

• The SimplexNodePlacer class used by the HierarchicLayout no longer throws an error due to an internal overflow for very wide layouts.
• The HierarchicLayout class now correctly considers the specified halos of group nodes when there is a partition grid defined.
• The HierarchicLayout class no longer generates broken non-orthogonal edge segments of same-layer edges for some cases in conjunction with integrated edge labeling and edge labels placed at the ports.
• The HierarchicLayout class now properly satisfies PortCandidates defined for same-layer edges at nodes where other edges with (rather large) source/target port labels additionally exist.
• The HierarchicLayout class now produces a correct edge grouping structure for short edges having the same source and target group ID.
• The HierarchicLayout class no longer throws an exception when the edge-directedness feature (HierarchicLayoutData#EdgeDirectedness) is used in conjunction with enabled back-loop routing (HierarchicLayout#BackLoopRouting).
• The HierarchicLayout class no longer creates unnecessary spacing between sub-components (see HierarchicLayoutData#SubComponents) and other elements. This previously happened in some cases due to edge/node labels being present. In consequence, these cases are now more compact.
• The HierarchicLayout class no longer produces overlaps between (large) external node labels and unrelated edges.
• The HierarchicLayout class no longer produces overlaps between sub-component elements (see HierarchicLayoutData#SubComponents) and edges that are not part of the component.
• The HierarchicLayout class now correctly assigns ports to edges incident to groups if the uniform port assignment is enabled (see property HierarchicLayoutData#UniformPortAssignmentGroups) for some cases where it previously did not yield a uniform port distribution.
• The HierarchicLayout now correctly considers the PreferredPlacementDescriptor settings of an edge label when there are additionally edge groupings defined. Previously, it could, for example, happen that the edge label was placed on the wrong side of the edge.
• The HierarchicLayout class now adheres more closely to its maximum duration and its AbortHandler.
• The HierarchicLayout class now considers the PortCandidate directions correctly for layout orientations other than TopToBottom. This also improves the optimization results with PortCandidateSets that allow multiple directions to connect to nodes.
• For input graphs with a PartitionGrid structure, the HierarchicLayout class now correctly considers the layering produced by the FromScratchLayerer if it is already compatible with the specified grid structure.
• The HierarchicLayout class no longer throws an exception for some invalid specifications of alternative group bounds in incremental layout mode.
• The results of the DefaultLayerSequencer class are now deterministic by default, since it no longer aborts the calculation after 10s. For this, its MaximumDuration value is now unrestricted.

Organic Layout

• The OrganicLayout class no longer produces broken routes of self-loops at group nodes if the Scope is not equal to ALL.
• The OrganicLayout class now correctly considers the specified PartitionGrid if substructure detection is enabled. Previously, the grid cell assignment of nodes belonging to a substructure has been ignored.
• The OrganicLayout class now correctly considers fix-contents and fix-bounds groups (see enum GroupNodeMode) if the substructure detection is enabled.
• The OrganicLayout class now correctly detects chain substructures if there are nodes of different types (OrganicLayoutData#NodeTypes).
• The OrganicLayout class now satisfies property OrganicLayout#DeterministicModeEnabled for more cases when the maximum duration is restricted. Note, however, that non-deterministic behavior is still possible when restricting the duration.
• The OrganicLayout class no longer produces violations of the specified minimum node distance for separated radial substructures (see property StarSubstructureStyle#SEPARATED_RADIAL).

Clear Area Layout

• The ClearAreaLayout class no longer produces results where the specified area is not cleared for some input graphs when property ClearAreaStrategy is set to PRESERVE_SHAPES or PRESERVE_SHAPES_UNIFORM.
• The ClearAreaLayout class now correctly considers the initial partition grid assignment of nodes.

Orthogonal Layout

• The OrthogonalLayout class no longer produces bad edge routes where the path is non-orthogonal and does not connect to the source node anymore for some rare cases containing parallel edges or chain substructures.
• The OrthogonalLayout class now correctly considers the specified minimum group node sizes (see GroupingKeys#MINIMUM_NODE_SIZE_DPKEY). Previously, the minimum sizes were always enlarged by the groups' insets (see GroupingKeys#GROUP_NODE_INSETS_DPKEY). Actually, the minimum size should include the insets.
• The OrthogonalLayout class now correctly handles input graphs with parallel edges if the ParallelRoutesPreferenceEnabled property is enabled. Previously, such inputs have caused exceptions in some rare cases.
• The OrthogonalLayout class no longer generates overlaps between edge segments (of a parallel edge) and edge labels of other edges for some rare scenarios.

Edge Router

• The EdgeRouter class now correctly interprets specified intermediate points (EdgeLayoutDescriptor#IntermediateRoutingPoints) as well as bus points (BusDescriptor#BusPoints) in the case when the algorithm runs inside an orientation layout with an orientation other than TopToBottom.
• The EdgeRouter class now correctly considers the maximum duration and the AbortHandler when the octilinear routing style is chosen. Previously, it could happen that the algorithm kept on running even though the time was up.
• The EdgeRouter class no longer throws an exception for some rare cases with collinear bends.
• The EdgeRouter class now correctly handles direct content edges that are incident to group nodes with PortCandidateSets.
• The EdgeRouter class no longer produces bad layout results for some scenarios with grouped edges and multiple PortCandidates. Previously, the algorithm selected any of them without considering the alternative options.

Generic Labeling

• The GenericLabeling class no longer produces superfluous label overlaps if one of its RemoveNodeOverlaps or RemoveEdgeOverlaps properties is enabled.
• The GenericLabeling class no longer produces bad label placements for edges with direct group content routing, i.e., edges that connect a group node with one of its descendants and are routed directly without leaving the group.

Circular Layout

• A circular layout with LayoutStyle#BCC_ISOLATED can no longer get into an infinite loop for inputs where a component consists only of articulation points.

Single Cycle Layout

• The SingleCycleLayout class no longer produces violations of the specified minimum node distance.

Layout

• TableLayoutConfigurator now considers the correct OriginalPositions of the RowDescriptors and ColumnDescriptors when table insets are used.
• The TableLayoutConfigurator class now treats tables without rows or columns as tables with exactly one row and column instead of throwing an exception.
• The PolylineLayoutStage class now correctly considers a registered AbortHandler instance so that it is possible to terminate early. Previously, the stage ignored the AbortHandler.
• The TabularLayout class now always uses the correct bounding box values for node labels that are considered. Previously, wrong label bounds could lead to unnecessarily large rows or columns.
• The IsolatedGroupComponentLayout class no longer produces unnecessarily large group nodes if the specified GridSpacing is zero.

Incompatible Changes

API

• Due to the new install and uninstall methods of the ModelManager class, the following of its members have been changed:
  • The CanvasComponent constructor parameter has been removed. Instead, you can call the new install method with the CanvasComponent as parameter. Similarly, the CanvasComponent constructor parameters of the derived classes have been removed, too.
  • Its existing protected methods install and uninstall have been renamed to installItem and uninstallItem.
  • Its protected methods add and remove have been renamed to addItem and removeItem.
• The optional SelectionModel and Model parameters of HighlightIndicatorManager and SelectionIndicatorManager have been removed from the constructors, too. Instead, you can set the corresponding properties directly.
• The NavigationInputMode#adjustGroupNodeLocation method has now an additional parameter expandedSize that specifies the size of the group node when it is expanded.
• The LabelCreator#addLabel method can return null if no label is added.
• The LabelCreator#updateLabel method now returns a boolean value: true if the label has been updated, false if the label should be removed.
• The IHandle interface has a new method handleClick. This method must be implemented by custom handle implementations.
• The DataProviderAdapter#defined method has been removed since it had no effect.
• The GraphModelManager#ProvideUserObjectOnMainCanvasObject property has been renamed to ProvidingUserObjectOnMainCanvasObjectEnabled.
• The NodeLabelingPolicy enum has been moved from com.yworks.yfiles.layout.tree to com.yworks.yfiles.layout. The reason is that the policy is now not only supported by BalloonLayout but also by CircularLayout, RadialLayout and CactusGroupLayout.
• The type of the EdgeCellInfo#CellSegmentInfos property has been changed from YList to CellSegmentInfo[].
• The HierarchicLayoutData#SubComponents property is replaced by the new HierarchicLayoutData#Subcomponents property with a different signature. The new property uses instances of the new SubcomponentDescriptor class to define subcomponents, and the layout algorithm responsible for a component is now specified via the new SubcomponentDescriptor#LayoutAlgorithm property.
• Similarly, the data provider keys HierarchicLayout#SUB_COMPONENT_ID_DPKEY and HierarchicLayout#SUB_COMPONENT_LAYOUT_ALGORITHM_DPKEY are replaced by the new key HierarchicLayout#SUBCOMPONENT_DESCRIPTOR_ID_DPKEY that assigns instances of the new SubcomponentDescriptor class to nodes.
• The TemporaryGroupNodeInsertionData#Components property is replaced by the new TemporaryGroups property of type TemporaryGroupDescriptor, which now specifies groups and the applied recursive group layout algorithm.
• Similarly, the data provider key TemporaryGroupNodeInsertionStage#COMPONENT_LAYOUT_ALGORITHM_DPKEY was removed and the name of the key TemporaryGroupNodeInsertionStage#COMPONENT_ID_DPKEY was changed to TEMPORARY_GROUP_DESCRIPTOR_DPKEY.
• The Pen#DashStyle property is now marked as @Nonnull, since several internal usages assumed that to be the case anyway.

Changes of Default Behavior

• The semantic of the TraversalDirection#BOTH enumeration value used by the Neighborhood and Bfs algorithms has been changed and does not ignore the direction anymore, but now returns a union of the SUCCESSOR and the PREDECESSOR results instead. The old behavior can be restored by using the new TraversalDirection#UNDIRECTED enum value. Consequently, the default value of the TraversalDirection property of both the Neighborhood and the Bfs algorithm has been changed from BOTH to UNDIRECTED.
• With the graph builder classes, label bindings which don't provide label data (or provide null) no longer add empty labels. Instead, no label will be added. Similarly, for label sources, no label will be added for data items for which the LabelCreator#TextProvider returns null.
• When starting to drag the handle of a selected item, the handle isn't replaced anymore by a new handle instance provided for the selected item. Previously, this happened automatically, regardless of whether necessary to support use cases where state changes should result in a different handle instance. Now, the GraphEditorInputMode#requeryHandles method has to be called explicitly when changes are made that affect handles that are potentially already visible. Alternatively, a proxy implementation can be used that dynamically dispatches to new instances on its own when required.
• The HandleInputMode class doesn't initialize a handle drag as soon as the handle is pressed, anymore. Instead, it waits until the DraggedRecognizer is triggered. When pressed, the mutex is already acquired, which discards other concurrent input modes. This can be turned off by setting the RequestMutexOnPress property to false.
• ResizeStripeInputMode now always uses the N_RESIZE_CURSOR for resizing rows and the W_RESIZE_CURSOR for resizing columns instead of using N_RESIZE_CURSOR, S_RESIZE_CURSOR, W_RESIZE_CURSOR or E_RESIZE_CURSOR depending on the dragged side. The old behavior was inconsistent when dragging the border between two stripes and had no visual difference on most platforms. New cursor properties have been added that can be used to set a custom cursor for different usecases.
• The lists returned by the GraphPartition#getCells, DynamicObstacleDecomposition#getCells and DynamicObstacleDecomposition#getObstacles methods are no longer unmodifiable.
• The value of the DefaultLayerSequencer#MaximumDuration property is now unrestricted. Previously, it was restricted to 10 seconds. It is used by the HierarchicLayout class, which still adheres to its own maximum duration.

Deprecations

• The BevelNodeStyle, ShinyPlateNodeStyle, and PanelNodeStyle classes and their renderers are now deprecated. Their appearance is rather outdated, and some of them are not very configurable. For group nodes, have a look at the new GroupNodeStyle class.

New Demos

• The Group Node Style Demo shows the new GroupNodeStyle in different configurations.
• The Arrow Node Style Demo shows the new ArrowNodeStyle and its setting options.
• The Rectangle Node Style Demo shows the new RectangleNodeStyle and its setting options.
• The Shape Node Style Demo shows the shapes that are available for the ShapeNodeStyle.
• The Default Label Style Demo shows the background shapes that are now available for the DefaultLabelStyle.
• The Text Wrapping Demo shows the various options of the new text wrapping feature for labels.
• The Layout Without View Demo shows shows how to create a graph, run a graph analysis algorithm, and calculate a layout without using a view or the IGraph API.

Major New Features

Smooth animations

• Many viewport transitions are now smoothly animated. This prominently includes scrolling and zooming with the mouse wheel, but also the various commands, such as zooming via a toolbar button, fitting the graph into the viewport, interacting with the overview, and many others. This can be turned off for individual interactions via the new CanvasComponent#AnimatedViewportChanges property, and customized with the new protected method CanvasComponent#getViewportAnimationDuration.

Node Types

• The CircularLayout class is now able to separate nodes that are on the same cycle with respect to their node type. For this, the new NodeTypeAwareSequencer class can be set as NodeSequencer on the CircularLayout#SingleCycleLayout. Node types are specified via the CircularLayoutData#NodeTypes property.
• The ComponentLayout class now supports node types. The types influence the arrangement and ordering of the components such that components consisting mostly of nodes of the same type are put close to other components consisting of nodes of that type. Use the ComponentLayoutData#NodeTypes property to define types.
• The TreeLayout and ClassicTreeLayout classes now support node types. The types influence the ordering of child nodes and the subtrees rooted at them such that nodes of the same type are preferably placed next to each other. Node types are a weak criterion, i.e., if the ordering and placement is determined by other constraints, these are prioritized. Types can be defined via the TreeLayoutData#NodeTypes property.
• The HierarchicLayout class now supports node types. The types influence the ordering of nodes within their layers as a subordinate optimization criteria. More precisely, nodes of the same type are more likely to be placed next to each other if this does not violate other constraints.
• The OrganicLayout class now allows defining node types via the new OrganicLayoutData#NodeTypes property. The types control the detection of substructures (e.g. stars, parallel structures). When types are defined, only nodes of the same type can form a substructure. For star-like and parallel substructures, it is also possible to have a single substructure with nodes of different types, see properties #ParallelSubstructureTypeSeparationEnabled and #StarSubstructureTypeSeparationEnabled. The algorithm still tries to highlight the different types by choosing a suitable layout for these components (e.g., placing nodes of the same type closer together or on the same circle).
• The OrthogonalLayout class now allows defining node types via the new OrthogonalLayoutData#NodeTypes property. The types control the detection of substructures, i.e., chains, cycles and trees. When types are defined, only nodes of the same type can form a substructure.
• The node types feature is shown in the new NodeTypesDemo and the new OrganicSubstructuresDemo.

Edge routing only if needed

• Added the new penalty property PenaltySettings#SketchViolationPenalty supported by the EdgeRouter class. It defines the cost for a deviation from the original edge path if the new routing policy property is set to #SEGMENTS_AS_NEEDED.
• Optionally, the EdgeRouter, ChannelEdgeRouter and BusRouter classes now automatically determine whether a new path should be calculated for a certain edge. This is controlled via the new properties EdgeLayoutDescriptor#RoutingPolicy, ChannelEdgeRouter#RoutingPolicy and BusDescriptor#RoutingPolicy, respectively. The decision is based on the quality of the existing routes - edges with strict violations of the routing style or that intersect other elements will be selected for routing. Available options:
  • RoutingPolicy#ALWAYS: A new route is calculated in any case. This was the previous behavior and remains the default.
  • RoutingPolicy#PATH_AS_NEEDED: The algorithm determines whether a new route is needed. If an edge is selected, its current path is not considered when computing a new route.
  • RoutingPolicy#SEGMENTS_AS_NEEDED: The algorithm determines whether a new route is needed. If an edge is selected, its current path is preserved as much as possible. Only the required segments are changed. This is only supported by the EdgeRouter class.

New Features

Graph, and View

• The graph and tree builders now support bindings for bend locations. This is implemented by new bend-related members of the EdgeCreator class.
• The new EdgePathPortLocationModel for ports owned by edges can be used to define port locations as a ratio of the edge path length. This keeps the port location stable when bends are added onto the edge path, for example during orthogonal edge editing.

Layout and Algorithms

• The new TreeAnalysis algorithm offers a convenient way of analyzing tree structures and querying tree-related properties (e.g. leaf nodes, parent-child relations and more).
• The new ParallelEdges#findParallelEdges method allows to find all sets of parallel edges contained in a given graph or incident to a specific node.
• The new GenericLayoutData class is a generic implementation of LayoutData that allows to pass arbitrary data to layout stages. As a consequence, the LayoutData#apply, ItemCollection#provideMapper and ItemMapping#provideMapper methods were removed.
• The new SelfLoopRouterData class specifies custom data for the SelfLoopRouter class. In more details, it allows defining which self-loop edges should be routed and which should keep their current path.
• The new PortPlacementStageData class specifies custom data for the PortPlacementStage class. In more details, it allows defining port candidates, port constraints, and node port candidate sets which are then considered by that layout stage.
• The SubgraphLayout class now allows defining which edges must be included or excluded in the subgraph. Previously, only nodes could be specified. The new SubgraphLayoutData class offers the #SubgraphNodes and #SubgraphEdges properties to conveniently define the nodes and edges that should form the subgraph the core layout runs on.
• The OrganicLayout class offers the new #ClusteringPolicy property, which allows to specify the clustering algorithm that is applied to the input graph. Three clustering algorithms are available: Louvain modularity, edge betweenness, and label propagation. Previously, the node clustering was always based on edge betweenness. By default, clustering is disabled.
• The PartialLayout class offers a new property #MovingFixedElementsAllowed to allow moving fixed elements. This often yields a better layout quality even though the preservation of the mental map declines because the fixed elements may change their position.
• The OrganicLayout and ClassicOrganicLayout classes support the new scope MAINLY_SUBSET_GEOMETRIC. In addition to the actual affected nodes, this scope may to some degree move nodes that are geometrically close to an affected node. The existing scope MAINLY_SUBSET is similar, but it does determine the closeness of other nodes by using the graph structure instead of the current geometry (i.e. location).

Improvements

Interaction

• The new HandleInputMode#QueryClosestHandle event can be used to provide the closest handle for a certain query location.
• Tooltip contents can now be provided asynchronously. As an alternative to setting the tooltip content directly, the ToolTipQueryEventArgs class also accepts a CompletionStage that provides the tooltip content asynchronously.
• The HandleInputMode#beginDragging method now returns a CompletionStage which indicates whether the drag of a handle has been finished or canceled.
• Validation of the text of edited labels can now be provided asynchronously. The new LabelTextValidatingEventArgs#ValidatedText property accepts a CompletionStage that provides the validated text asynchronously.
• The CanvasComponent#zoomToAnimated method now returns a CompletionStage that is completed when the animation has finished. The parameter of type IEventListener<AnimationEventArgs> has been removed.
• The CreateEdgeInputMode#doStartEdgeCreation method now returns a CompletionStage that completes when the edge creation gestures has been finished or cancelled.
• The methods GraphEditorInputMode#createLabel, #createLabelCore, #editLabel, #editLabelCore, and #addLabel now return a CompletionStage that completes when the label creation, editing or adding has been finished.
• The methods TableEditorInputMode#createLabel, #editLabel, and #addLabel now return a CompletionStage that completes when the label has been created, edited or added.
• The MoveInputMode#doStartDrag method now returns a CompletionStage that completes when the move gestures has been finished or cancelled.
• Changing the selection state of a large number of elements is now faster.
• The OrthogonalEdgeEditingContext#createOrthogonalEdgeDragHandler method now accepts an IPortOwner instead of only an INode as dragged item. This can be used for custom edge drag handling that should support orthogonal edge editing.
• The ItemCopiedEventArgs class now guarantees that its #Original and #Copy properties are not null.

Graph

• The DefaultFolderNodeConverter and AbstractFoldingEdgeConverter classes now have #PortLabelStyle and #PortLabelLayoutParameter properties to control the style and label layout parameter of copied port labels.
• The new NodeInsetsProvider class is an INodeInsetsProvider that returns the same insets for each node.
• The GraphBuilder, TreeBuilder, and AdjacencyGraphBuilder classes no longer throw Exceptions during calls to #updateGraph when the graph was modified.

Organic Layout

• For the substructures in the OrganicLayout it is now possible to explicitly specify whether structures are allowed to be nested or not. Previously, substructures were allowed to be nested by default. New styles were added while the old styles now will not generated nested structures anymore.
  • Star structures offer the new styles StarSubstructureStyle#RADIAL_NESTED and StarSubstructureStyle#CIRCULAR_NESTED.
  • ChainSubstructureStyle#RECTANGULAR_NESTED and ChainSubstructureStyle#STRAIGHT_LINE_NESTED are the new styles for nested chains.
  • CycleSubstructureStyle#CIRCULAR_NESTED is the new style for nested cycles.
• The OrganicLayout class now offers the possibility to define the minimum sizes of substructures (stars, chains, cycles, and parallel structures). Structures of smaller size are not handled as a substructure. For each type of structure a new property was added: OrganicLayout#StarSubstructureSize, OrganicLayout#ChainSubstructureSize, OrganicLayout#CycleSubstructureSize and OrganicLayout#ParallelSubstructureSize.
• With substructures, the OrganicLayout class now often produces more compact results and comes with an improved placement of degree-one nodes.
• When specified for the OrganicLayout class, the scope MAINLY_SUBSET now works together with more of its other features and constraints, and has a larger impact. For example, it previously had very little or no effect when a partition grid or an output restriction was defined.

Edge Routing

• When the EdgeRouter class runs with a highly restricted maximum duration or is aborted via the AbortHandler class, i.e., the router operates in the fastest possible mode, the calculated edge routes now are of higher quality. The quality improvements mainly affect cases with fixed port locations.
• The EdgeRouter class now allows to explicitly define the costs for different types of edge crossings. The new properties PenaltySettings#AdjacentEdgeCrossingPenalty and PenaltySettings#SelfCrossingPenalty relate to crossings between two adjacent edges and crossings between two line segments that belong to the same edge, respectively. Previously, all types of crossings were covered by the existing EdgeCrossingPenalty property.
  • By default, now, crossings of adjacent edges are more expensive than normal ones and self-crossings are the most expensive.
  • Furthermore, the default values of the EdgeLengthPenalty and GroupNodeCrossingPenalty properties were increased to obtain more balanced results.
• The EdgeRouter class now produces more suitable routes for edges with octilinear routing style. Previously, the diagonal segments where often omitted after/before an edge's first/last segment.

Hierarchic Layout

• The HierarchicLayout class now generates shorter paths for edges that cross borders of PartitionGrid columns in cases where there are no other obvious constraints that require the edge to be longer. This holds for the default vertical layout orientation; for a horizontal orientation, edges that cross borders of rows are affected by this improvement.
• The HierarchicLayout class now considers the edge direction when choosing a port candidate for edges with multiple candidates. This new strategy often leads to fewer bends.

Layout

• LayoutExecutor#start, GraphComponent#morphLayout and LayoutUtilities#morphLayout now return a CompletionStage instead of null.
• The new BalloonLayoutData#OutEdgeComparator property specifies a comparison function used to sort a nodes' outgoing edges.
• The new LayoutGraphAdapter#ORIGINAL_TAG_DP_KEY data provider key provides access to the object stored in the tag property of the original graph item from within custom layout code.
• The quality of the curved edge routing was improved with respect to various aspects and such that it yields aesthetically nicer curves. To further configure the curve routing, the following settings were added.
  • CurveShortcutsAllowed: if shortcuts are allowed, curves can become smoother and more direct but may violate other constraints (e.g. edge-edge distance). Available for HierarchicLayout (RoutingStyle#CurveShortcutsAllowed), EdgeRouter (EdgeLayoutDescriptor#CurveShortcutsAllowed) and CurveRoutingStage (CurveEdgeLayoutDescriptor#CurveShortcutsAllowed).
  • CurveUTurnSymmetry: allows to specify the symmetry preference for u-turns (180 degree turns) of curved routes. The default is zero so that results are equal to previous results. Available for HierarchicLayout (RoutingStyle#CurveUTurnSymmetry), EdgeRouter (EdgeLayoutDescriptor#CurveUTurnSymmetry) and CurveRoutingStage (CurveEdgeLayoutDescriptor#CurveUTurnSymmetry).
• The HierarchicLayout, EdgeRouter, and CurveRoutingStage classes now avoid unnecessary, consecutive Bezier segments for modeling larger straight-line parts of an edge path. The resulting reduced bend count improves the user experience when working with the BezierEdgeStyle.
• The ClassicTreeLayout class now features properties #MinimumFirstSegmentLength and #MinimumLastSegmentLength that allow to specify the minimum first and last segment length for the orthogonal routing style.
• The new ParallelEdgeRouterData#RoutedParallelEdges property returns which edges the ParallelEdgeRouter class routed and thus were hidden during the core layout. This can be useful if parallel, non-leading edges need further handling, e.g., for placing their labels.

View

• The CanvasComponent#makeVisible, CanvasComponent#fitContent, and GraphComponent#fitGraphBounds methods now return a CompletionStage that completes when the view port adjustment has been finished.
• The Animator#animate method now returns a CompletionStage that is completed when the animation has finished. The parameter of type IEventListener<AnimationEventArgs> has been removed together with the AnimationEventArgs class.
• The new #install and #uninstall methods of the GraphModelManager class simplify exchanging the manager used by a GraphComponent. They are called when setting/removing a GraphModelManager as GraphComponent#GraphModelManager and should also be called when combining a GraphModelManager with a CanvasComponent.
• The new IAnimation#createDelay method creates an animation that does nothing. This is especially useful in combination with other animations that run in parallel or in sequence to create complex multi-sequence animations. The accompanying method #createDelayedAnimation for the IAnimation interface delays the provided animation.
• The new IAnimation#fromCallback method creates an animation for a given animation callback and duration.
• The CanvasComponent#makeVisible method now respects margins defined by the CanvasComponent#ContentMargins property. Ensure visible is called for example by keyboard navigation,.
• The ZOOM command now respects margins defined by the CanvasComponent#ContentMargins property when executed with a rectangle as parameter.
• The ZOOM_TO_CURRENT_ITEM command now respects the margins defined in the CanvasComponent#ContentMargins property.
• Setting the various descriptor properties of the GraphModelManager class no longer causes updates for every installed item if the descriptor hasn't actually changed.
• The OverviewInputMode now renders its handle on top of the viewport rectangle instead of below it.
• The ViewportLimiter#limitViewport method now has an overload with a parameter that enforces the ViewportLimitingPolicy#STRICT policy.
• The CanvasComponent#makeVisible method now has an overload with a parameter to specify insets to keep around what to make visible in the viewport.
• The CanvasComponent#makeVisible method now has an additional overload to make a set of points visible in the viewport. This is mainly useful when using a Projection and trying to make something visible that is not a rectangle in world coordinates.
• All the following features no longer block user interaction: the viewport animations for CanvasComponent#makeVisible, executing scroll commands when the CanvasComponent#ScrollCommandAnimationEnabled property is enabled, and executing ICommand#ZOOM_TO_CURRENT_ITEM.
• The CanvasComponent#fitContent and GraphComponent#fitGraphBounds methods now have an overload with a parameter that allows changing the viewport in an animated fashion.
• GraphComponent#openFile now auto-completes the chosen filename with the file extension chosen in the FileDialog if missing.

Styles

• Edge cropping now works as expected when using BezierEdgeStyle and the terminating nodes have styles that don't provide an outline in their IShapeGeometry implementation.

Bugfixes

Interaction

• When expanding a closed group, the parent groups of the expanded group no longer become unnecessarily large. The incorrect behavior could be observed only under certain conditions and was caused by a bug in the NavigationInputMode class.
• Auto dragging was not stopped in certain cases.
• The text area shown by the TextEditorInputMode class is now correctly placed if the TextAreaPlacementPolicy#MOVE_TEXT_AREA is set and a projection is used.
• Fixed editing self-loops with PolylineEdgeStyle and orthogonal edge editing enabled.
• HandleInputMode is no longer canceled if a handle is removed during its own DragFinished call. This fixes some very rare exceptions under complicated circumstances.
• Fixed a bug in CreateEdgeInputMode which prevented toggling the direction of an orthogonal edge segment when the mouse was over a potential target.

Graph

• The ITable#StripeChanged event now reports the correct parent when re-parenting will be undone or redone.
• A label with EdgeSegmentLabelModel or EdgePathLabelModel now moves steadily when the segment to which it belongs moves.
• The FilteredGraphWrapper class now dispatches ParentChanged events in the correct order after predicate changes.
• All #setFactory methods of the Node-, Edge-, Label-, Port-, and BendDecorator classes now respect the #nullIsFallback property.
• FilteredGraphWrapper now fires the correct events when filtering out port labels. Previously, the events contained incorrect owner information.
• Fixed CompositeUndoUnit#UndoName setting the RedoName instead.

Styles

• The parameter of type IShapeGeometry of the DefaultEdgePathCropper#isInside and #getIntersection methods is now nullable.
• Built-in styles with rounded corners now have the correct outline shape for certain calculations.
• Edges with Bezier paths can now also be animated to non-Bezier paths.

Geometry

• The #Area property of an empty RectD instance (including RectD#EMPTY) is now always zero, and no longer a negative value.

Hierarchic Layout

• The HierarchicLayout class now correctly processes input graphs with sub-components (HierarchicLayoutData#SubComponents) and curved edge routing style. Previously, such setups may have a caused an exception.
• The HierarchicLayout class now correctly handles grouped input graphs if the node compaction is enabled (see property SimplexNodePlacer#NodeCompactionEnabled). Previously, the algorithm sometimes produced less compact results for such inputs.
• The HierarchicLayout class now correctly considers the specified port groups for edges (see HierarchicLayoutData#SourcePortGroupIds). Previously, such groups were not always considered properly if there are either critical edges or property SimplexNodePlacer#EdgeStraighteningEnabled is true.
• The HierarchicLayout class now correctly considers the specified critical edge priorities (see HierarchicLayoutData#CriticalEdgePriorities) if the input graph contains grouped edges.
• The HierarchicLayout class now adheres more closely to its maximum duration and its AbortHandler.
• The HierarchicLayout now considers the PortCandidate directions correctly for layout orientations other than TOP_TO_BOTTOM. This also improves the optimization results with PortCandidateSets that allow multiple directions to connect to nodes.
• The HierarchicLayout class now correctly considers input graphs with group nodes and a PartitionGrid. Previously, in some rare cases, such inputs may have caused overlapping group nodes.
• The HierarchicLayout class no longer generates broken non-orthogonal edge segments of same-layer edges for some cases in conjunction with integrated edge labeling and edge labels placed at the ports.
• The HierarchicLayout class now correctly routes grouped edges where in some rare cases it could previously lead to node-edge overlaps.
• The HierarchicLayout class not properly satisfies PortCandidates defined for same-layer edges at nodes where additionally other edges with (rather large) source/target port labels exist.
• The HierarchicLayout class now produces a correct edge grouping structure for short edges having the same source and target group ID.
• The HierarchicLayout class no longer produces superfluous port overlaps if there are edges with strong port constraints.
• The HierarchicLayout class now correctly assigns ports to edges incident to groups if the uniform port assignment is enabled (see property HierarchicLayoutData#UniformPortAssignmentGroups) for some cases where it previously did not yield a uniform port distribution.
• The HierarchicLayout now correctly considers the PreferredPlacementDescriptor settings of an edge label when there are additionally edge groupings defined. Previously, it could, for example, happen that the edge label was placed on the wrong side of the edge.
• The HierarchicLayout no longer throws an Exception when the edge directedness feature (HierchicLayoutData#EdgeDirectedness) is used in conjunction with enabled backloop-routing (HierarchicLayout#BackLoopRoutingEnabled).
• The HierarchicLayout class no longer creates unnecessary spacing between sub-components (see HierarchicLayoutData#SubComponents) and other elements, which previously happened in some cases due to edge/node labels being present. In consequence, these cases are now more compact.
• The HierarchicLayout class no longer produces overlaps between (large) external node labels and unrelated edges.
• The HierarchicLayout class no longer produces overlaps between sub-component elements (see HierarchicLayoutData#SubComponents) and edges that are not part of the component.

Organic Layout

• The OrganicLayout class no longer throws an exception when running it on a graph with a partition grid, group nodes and such that the IDs of the group nodes (see provider key GroupingKeys#NODE_ID_DPKEY) are defined using a provider that cannot handle null as argument to its get method.
• The OrganicLayout and ClassicOrganicLayout classes no longer cause undesired layout side effects when a mapper is registered with key RecursiveGroupLayout#GROUP_NODE_LAYOUT_DPKEY or when data is provided via the RecursiveGroupLayoutData#GroupNodeLayouts property. Previously, the layout algorithms registered there could be applied to nodes that should actually be kept fix by the organic layout.
• The OrganicLayout class now produces correct results if auto-clustering is enabled (i.e., property ClusteringPolicy is not NONE) and the GroupNodeMode is set to FIX_BOUNDS or FIX_CONTENTS.
• The OrganicLayout class now correctly considers fix-contents and fix-bounds groups (see enum GroupNodeMode) if the substructure detection is enabled.
• The OrganicLayout class now correctly handles nodes with several degree-one neighbors. Previously, such inputs could cause arrangement artifacts if the StarSubstructureStyle is NONE.
• The OrganicLayout class now correctly detects chain substructures if there are nodes of different types (OrganicLayoutData#NodeTypes).

Circular Layout

• The CircularLayout class no longer crashes when enabling edge bundling, defining node types (CircularLayoutData#NodeTypes) and applying it on a graph that contains parallel edges.
• The CircularLayout class no longer produces node overlaps if property SingleCycleLayout#MinimumNodeDistance is set to 0.

Partial Layout

• The PartialLayout class now correctly routes the edges if property MovingFixedElementsAllowed is enabled. Previously, in some rare cases, this setting could cause broken edge routes.

Clear Area Layout

• The ClearAreaLayout class now correctly routes the edges if property EdgeRoutingStrategy is set to STRAIGHTLINE. Previously, in some rare cases, this setting could cause broken edge routes.

Edge Routing

• The EdgeRouter class no longer generates unnecessary detours in the routes when it is configured with MonotonicPathRestriction#BOTH.
• The CurveRoutingStage class now correctly considers the minimum distance to nodes specified as value of the CurveEdgeLayoutDescriptor#MinimumNodeToEdgeDistance property. Previously, the curves could violate the distance and get too close to nodes.
• The EdgeRouter class no longer has a problem that occasionally resulted in bad edge routing artifacts if edge grouping is enabled and non-affected edges are grouped at both end points.
• The EdgeRouter class no longer occasionally throws an exception if the input contains bus edges (defined via BusDescriptor).
• The OrganicEdgeRouter#KeepingExistingBendsEnabled property now correctly obeys its definition and actually keeps the absolute coordinates of the existing bends.
• The EdgeRouter class no longer produces artifacts if there are edges with curved routing style and labels, and the integrated edge labeling is disabled (see property EdgeRouter#IntegratedEdgeLabelingEnabled).

Layout

• The comparison delegates defined in TreeLayoutData#OutEdgeComparators and SeriesParallelLayoutData#OutEdgeComparators no longer receive null elements during runtime.
• The SimpleProfitModel class now computes meaningful different profits based on the PreferredPlacementDescriptor for candidates that belong to a SliderEdgeLabelLayoutModel or a DiscreteEdgeLabelLayoutModel. Previously, the computed profit was equal for all candidates.
• Fixed a bug in LayoutExecutor which caused port labels not to be placed in their calculated position after a layout animation.
• The LayoutExecutor class now uses the correct target bounds when a projection is set on the GraphComponent.
• The CircularLayout class no longer produces node label overlaps when its PlacingChildrenOnCommonRadiusEnabled property is disabled.
• The ClearAreaLayout class now correctly considers node labels. Previously, there could be results where node labels intersected with the specified area to be cleared.
• The ParallelEdgeRouter class now produces correct parallel routes if its JoiningEndsEnabled property is enabled.
• Curved edge routes generated by HierarchicLayout, EdgeRouter and CurveRoutingStage no longer contain a self-crossing for edges that connect to a group node and where the connection style CurveConnectionStyle#ORGANIC is specified.
• Fixed a bug in TableLayoutConfigurator that resulted in wrong OriginalPositions of the RowDescriptors and ColumnDescriptors when table insets were used.
• Fixed a bug that caused errors in shear transformations.
• Fixed the UndoEngine getting corrupted after a layout exception has been catched.
• The TabularLayout class now correctly handles the case that the input graph contains only a single node. Previously, the node was not properly assigned to a partition cell and the partition cell row/column did not get correct values for its computed width, height and position.

View

• The mouse event coordinates are no longer quantized to very large steps if a projection is used and the viewport is zoomed in afterwards.
• The clipboard now doesn't copy labels or ports if they are not selected and their owner's IClipboardHelper forbids copying the owner.
• The ZOOM_TO_CURRENT_ITEM command no longer moves the current item outside the visible area in rare cases. This was caused by a problem in the ViewportLimiter class.
• Callbacks registered for removed visuals on the CanvasObject tree now reliably run after the visual is indeed no longer visible.
• Callbacks registered with the IRenderContext#setDisposeCallback method now are reliably called, even when a canvas object has been explicitly removed.
• The CanvasComponent#makeVisible method no longer ignores the limited viewport size in certain cases.
• CanvasComponent's or GraphComponent's scrollbars now respect the component's ViewPortLimiter.
• Fixed a bug that didn't reset the cursor when exiting the canvas and hovering over the scrollbars.
• Fixed a potential memory leak that could occur when changing the GraphComponent#GraphModelManager.
• The CanvasComponent#ZoomToAnimated method now works correctly when a Projection is used. This has previously been reported as fixed, but was not.

Incompatible Changes

• The protected method HandleInputMode#isHovering has been removed. To customize what handle should be used for a certain query location, the new HandleInputMode#QueryClosestHandle event can be used.
• The HandleInputMode#beginDragging method now returns a CompletionStage.
• The CanvasComponent#Projection property no longer accepts transforms with a non-zero translation component.
• The CanvasComponent#ContentViewMargins property has been renamed to #ContentMargins. Accordingly, the #onFitContentViewMarginsChanged method and the #FitContentViewMarginsChanged event have been renamed to #onContentMarginsChanged and #ContentMarginsChanged, respectively.
• The CanvasComponent#zoomToAnimated method now returns a CompletionStage that is completed when the animation has finished. The parameter of type IEventListener<AnimationEventArgs> has been removed.
• The CreateEdgeInputMode#doStartEdgeCreation method now returns a CompletionStage that completes when the edge creation gestures has been finished or cancelled.
• The GraphEditorInputMode#onLabelTextEdited method now returns a CompletionStage that completes when the text validation is done and provides whether the validation succeeded or was canceled.
• The methods GraphEditorInputMode#createLabel, #createLabelCore, #editLabel, #editLabelCore, and #addLabel now return a CompletionStage that completes when the label creation, editing or adding has been finished.
• The methods TableEditorInputMode#createLabel, #editLabel, and #addLabel now return a CompletionStage that completes when the label has been created, edited or added.
• The MoveInputMode#doStartDrag method now returns a CompletionStage that completes when the move gestures has been finished or cancelled.
• LayoutExecutor#start, GraphComponent#morphLayout and LayoutUtilities#morphLayout now return a CompletionStage instead of null.
• The Animator#animate method now returns a CompletionStage that is completed when the animation has finished. The parameter of type IEventListener<AnimationEventArgs> has been removed together with the AnimationEventArgs class.
• Animator#animateAndWait has been removed as the waiting didn't work correctly.
• The TextEditorInputMode#getTextBoxBounds method has been removed.
• The new GenericLayoutData class is a generic implementation of LayoutData that allows to pass arbitrary data to layout stages. As a consequence, the LayoutData#apply, ItemCollection#provideMapper and ItemMapping#provideMapper methods were removed.
• The PolylineEdgeRouterData class has been renamed to EdgeRouterData to match the name of the layout algorithm it supports.
• The overload of Centrality#pageRank taking just a Graph parameter has been removed as it only returned the sum of all pageRanks. Use the overload taking a Graph and an INodeMap instead.

Behavior

• The provider returned by IEdgeReconnectionPortCandidateProvider#ALL_NODE_AND_EDGE_CANDIDATES now doesn't return port candidates of the reconnected edge itself anymore as this lead to an unstable reconnection behavior.
• The FIT_CONTENT and FIT_GRAPH_BOUNDS commands now change the viewport in an animated fashion.
• Zooming with the mouse wheel to the center of the viewport by using CanvasComponent's CenterZoomEventRecognizer no longer uses the INCREASE_ZOOM and DECREASE_ZOOM commands.
• During animated viewport transitions, for performance reasons, mouse events are not redispatched, anymore, except for the last frame of the animation.
• LayoutExecutor#start doesn't throw an exception anymore if an error occurred during the layout that wasn't handled in the #LayoutFinished event. Instead the CompletionStage returned by #start is completed exceptionally.
• The OrganicLayout substructure styles StarSubstructureStyle#RADIAL, StarSubstructureStyle#CIRCULAR, ChainSubstructureStyle#RECTANGULAR, ChainSubstructureStyle#STRAIGHT_LINE and CycleSubstructureStyle#CIRCULAR do no longer allow that the detected substructures are nested inside other substructures. To get the old behavior and allow nesting, new style values were added (e.g. StarSubstructureStyle#RADIAL_NESTED).
• The following behavior change applies to class HierarchicLayout with polyline edge routing style: the default value of property EdgeLayoutDescriptor#MinimumSlope was changed from 0.3 to 0.2 which makes the sloped segments less steep and the overall results more compact.
• In organic layout, the way edge grouping influences the layout of certain substructures has changed. Structures are not split-up anymore into several ones when edges of nodes in the structure have different group IDs. Now, the new node types can be used to split-up structures (see OrganicLayoutData#NodeTypes). If a structure contains different edge groups, the grouping is properly considered and may influence the sorting of elements within the structure. Affected substructure styles are StarSubstructureStyle#SEPARATED_RADIAL, ParallelSubstructureStyle#RADIAL, ParallelSubstructureStyle#STRAIGHT_LINE and ParallelSubstructureStyle#RECTANGULAR.
• The OrganicEdgeRouter#KeepingExistingBendsEnabled property now correctly obeys its definition and actually keeps the absolute coordinates of the existing bends. Therefore, the new property OrganicEdgeRouter#ExistingBendsConsiderationEnabled was introduced to get the old behavior. Existing bends are considered, but their absolute coordinates are not kept.
• The default value of the ClassicTreeLayout#MinimumLayerDistance property was changed from 40.0 to 20.0 and the default value of the ClassicTreeLayout#BusAlignment property was changed from 0.3 to 0.5. In addition, the new #MinimumFirstSegmentLength and #MinimumLastSegmentLength properties may lead to different results compared to previous versions. Setting both properties to zero will neutralize their influence on the result.
• For the DefaultNodePlacer class that is used by the TreeLayout, the default values of the #HorizontalDistance and #VerticalDistance properties were changed from 40.0 to 20.0, and the default values of the #MinimumFirstSegmentLength and MinimumLastSegmentLength properties were changed from 0.0 to 20.0.
• For the CompactNodePlacer class that is used by the TreeLayout, the default values of the #HorizontalDistance and #VerticalDistance properties were changed from 40.0 to 20.0, and the default values of the #MinimumFirstSegmentLength and #MinimumLastSegmentLength properties were changed from 10.0 to 20.0.
• The default value of the LayeredNodePlacer#BusAlignment property was changed from 0.3 to 0.5.

Deprecations

• The CanvasComponent#ScrollCommandAnimationEnabled property has been deprecated in favor of the new AnimatedViewportChanges property, which offers more control over viewport animations, not just the scroll commands.
• The OrganicLayout#NodeClusteringEnabled property is now deprecated. It is replaced by the new OrganicLayout#ClusteringPolicy property. To disable clustering specify ClusteringPolicy#NONE. To enable it and use the same algorithm as before, specify ClusteringPolicy#EDGE_BETWEENNESS.
• The class com.yworks.yfiles.analysis.TreeAnalyzer has been deprecated. The more powerful class TreeAnalysis should be used instead.

New Demos

• The new LensInputMode demo shows how to create an InputMode to show a magnifying glass effect on the canvas.
• The new OrganicSubstructuresDemo shows you how substructures are supported by the OrganicLayout algorithm.
• The new NodeTypesDemo shows you how the new node types feature is supported by several layout algorithms.
• The new ReshapeHandleProviderConfigurationDemo shows you how to use a custom IReshapeHandleProvider implementation. The ReshapeHandleProviderDemo has been re-written to show how to use the built-in providers.
• CompositeNodeStyle demo shows how to combine multiple styles into one.
• The NetworkFlowsDemo has been added that shows how to use different network flow algorithms using a network of water pipes.
• The new MavenDemo shows how to set up a basic yFiles for Java (Swing) project using Apache Maven.
• The new GradleDemo shows how to set up a basic yFiles for Java (Swing) project using Gradle.

Demo Improvements

• More sample graphs and configuration options have been added to the LayoutStyle demo.

Improvements

View

• The ViewportLimiter class now always centers the viewport if its HonoringBothDimensionsEnabled property is disabled.

Layout

• The HierarchicLayout class now has an improved strategy for choosing the port candidates for same-layer edges with multiple available candidates. Previously, the chosen candidate may have led to superfluous back-loops.

Algorithms

• The LabelPropagationClustering algorithm now produces normalized, continuous clustering IDs. In other words, for example, if it finds 5 clusters, they get IDs from 0 to 4. Previously, the range of IDs may have contained holes. If initial label values are provided, this normalization is omitted.

GraphML

• The ValueSerializer for well-known color names now supports screaming snake case in addition to camel case and lower case names.

Bugfixes

View

• The clipboard now doesn't copy labels or ports if they are not selected and their owner's IClipboardHelper forbids copying the owner.
• The CanvasComponent#ZoomToAnimated method now works correctly when a Projection is used.
• The ZOOM_TO_CURRENT_ITEM command no longer moves the current item outside the visible area in rare cases. This was caused by a problem in the ViewportLimiter class.
• Fixed a bug in CanvasComponent#FitContent and GraphComponent#FitGraphBounds which caused FitContentViewMargins being incorrectly applied in case a Projection has been set.
• The following issues of the ZOOM_TO_CURRENT_ITEM command have been corrected:
  • The item is now longer placed slightly out of center if scrollbars appear during the operation.
  • If the current item is too large to fit the viewport at zoom 1, the command now zooms out.
• Fixed incorrect margins on an GraphOverviewComponent with a Projection set.
• Fixed a bug which caused the ZOOM command to disrespect the ViewportLimiter if executed with a rectangle as parameter.
• The mouse event coordinates are no longer quantized to very large steps if a projection is used and the viewport is zoomed in afterwards.
• Fixed Animator#animateAndWait to update the canvas during the animation.
• GraphOverviewComponent now considers its border thickness correctly when calculating the visible area of a GraphComponent using a projection.

Graph

• The DefaultFolderNodeConverter and AbstractFoldingEdgeConverter classes (and thus, also the DefaultFoldingEdgeConverter and MergingFoldingEdgeConverter classes) no longer ignore port labels.
• A label with EdgeSegmentLabelModel or EdgePathLabelModel now moves steadily when the segment to which it belongs moves.

Input

• The CreateEdgeInputMode class no longer has an error which prevented the removal of port candidate visualizations after another input mode claimed to be active.

GraphML

• Labels at ports of collapsed nodes are no longer lost during GraphML serialization.

Styles

• HtmlLabelStyle: Fixed text placement when the render size of the label text exceeds the size reserved for the label.

Layout

• The TabularLayout class no longer throws an exception about a missing PartitionGrid when used within RecursiveGroupLayout and RecursiveGroupLayoutData and TabularLayoutData are used without an explicit cell-id mapping.
• The LayoutExecutor class now uses the correct target bounds when a projection is set on the GraphComponent.
• When the MaximumDuration of the EdgeRouter class is exceeded, it now still uses the same port for edges that are grouped. Previously, edge grouping constraints were mostly ignored when the time was up.
• Improved the reaction time of the EdgeRouter class when the MaximumDuration is exceeded or the algorithm should stop due to AbortHandler for some cases where previously the search for a path kept on running for a long time.
• The RadialLayout class is now much faster if the input graph is a very large tree structure.
• The OrganicLayout and ClassicOrganicLayout classes no longer produce an internal integer overflow that may lead to an early exit and, thus, poor layout results for very large input graphs.
• The ClearAreaLayout class no longer throws an exception for some scenarios where the same algorithm instance was first applied to a graph with PartitionGrid and later to a graph without grid.
• The EdgeRouter and PolylineLayoutStage classes no longer produce broken routes for edges with polyline segments. Previously, such broken routes may have appeared in rare cases.
• The HierarchicLayout class now correctly considers the back-loop routing style (HierarchicLayout#BackLoopRoutingEnabled) for graphs with critical edges (see HierarchicLayoutData#CriticalEdgePriorities).
• The ClearAreaLayout and FillAreaLayout classes no longer throw an exception for some input graphs with edge labels if property EdgeLabelConsiderationEnabled is enabled.
• The GenericLabeling class no longer throws an exception for edge labels with preferred placement descriptor if property EdgeLabelPlacementEnabled is disabled.
• The TreeLayout class now correctly handles trees with group nodes. Previously, it sometimes produced overlapping elements and halo violations for such inputs.
• The curved edge routes produced by HierarchicLayout, EdgeRouter or CurveRoutingStage no longer violate the minimum node-edge distance or intersect the node. Intersections could previously happen especially when the specified node-edge distance was zero.
• The RecursiveGroupLayout class now correctly handles setups that use both recursive and non-recursive group nodes. Previously, such use-cases may have led to invisible/ignored edges and, thus, broken edge routes.
• The PartialLayout class now transfers the value of its PartialLayout#MaximumDuration property to the internally used edge routing algorithm. This means that when the partial layout has a restricted running time, the routing part will be restricted, too. Previously, the duration of the edge routing was unrestricted. Note that if the router instance is user-specified, this instance will not get a maximum duration.
• The HierarchicLayout, EdgeRouter and CurveRoutingStage classes no longer occasionally throw an exception when the curved routing style is used for graphs that have self-loop edges.
• The ClearAreaLayout class now produces correct orthogonal routes for edges if its ClearAreaStrategy property is set to a local strategy. Previously, some of the edges may have received a non-orthogonal route.
• The EdgeRouter class no longer throws an exception if the input contains a bus defined via BusDescriptor where all the associated edges are actually fixed.

Hierarchic Layout

• The HierarchicLayout class no longer produces an infinite looping issue in the incremental layout mode for some input graphs with layer constraints that specify that a node should be placed in the topmost/bottommost layer.
• The HierarchicLayout class no longer produces unnecessary edge crossings between self-loop edges at the same node in cases where a larger number of self-loops exist at a node.
• The HierarchicLayout class no longer ignores edges connected to group nodes when the group node contains a bus structure (see HierarchicLayoutData#Buses) and no other elements. Such edges were previously actually removed from the layout graph such that other stages (e.g. the ComponentLayout) could have failed with an exception.
• The HierarchicLayout class no longer occasionally throws an exception when enabling HierarchicLayout#GroupCompactionEnabled and in conjunction with layering constraints and/or a group node marked as incremental.
• The HierarchicLayout class does no longer violate the specified minimum length for edges incident to group nodes.
• The sequencing phase of the HierarchicLayout class is now faster for large graphs with sequence constraints and non-incremental layout mode.

Edge Routing

• The BusRouter class now produces more suitable edge routes for rare cases that were caused by an unsuitable bus placement.
• The EdgeRouter class now uses the given ports for edges of a bus with fixed edges.
• The EdgeRouter class now correctly considers edges incident to a fixed inner port of a group node when the routing algorithm has restricted maximum duration. Previously, this setup sometimes led to strange edge routes with many superfluous bends.
• The EdgeRouter class no longer contains edges with self-crossings in some rare cases where it previously failed to eliminate them.
• The EdgeRouter and CurveRoutingStage classes no longer change the path of unaffected (fixed) edges when the ControlPointCreationEnabled property of their associated EdgeLayoutDescriptor instance (CurveEdgeLayoutDescriptor respectively) is enabled.
• The EdgeRouter class now correctly supports the use case that a subset of edges is routed with the curved routing style while another subset is routed with another routing style and different settings on the associated individual EdgeLayoutDescriptor instances. Previously, with some edges being curved, the settings of the other edges got lost and the default settings were used.
• The OrthogonalSegmentDistributionStage class does no longer crash when receiving input graphs with a very large edge count (greater than approximately 22000). Note that the ChannelEdgeRouter class is affected too, as the stage is by default called from within the router.

Analysis

• The Cycles#FindCycleEdges algorithm no longer crashes when the given input graph contains self-loops.

This release contains many new major features and lots of other new features, improvements, and bugfixes for all parts of the library. In addition to the new demos, there are some notable demo improvements, too.

If you are updating from an older version of yFiles for Java, have a look at the list of incompatible changes.

Major New Features

Isometric Drawing and Other Projections

CanvasComponent (and thus GraphComponent) now has an additional Projection property that can be used to transform the viewport into a different parallel projection, e.g. isometric or cabinet projection. Predefined useful projections are provided as constants on the new Projections class. Interaction, including graph editing, snapping, orthogonal edge editing, etc. still work as expected, just within the new projection. That is, orthogonal edge editing becomes isometric edge editing with an isometric projection. There is a corresponding chapter in the Developer's Guide that goes into further detail what has changed and which customization options exist.

The IsometricDrawingDemo displays graphs in an isometric fashion to create an impression of a 3-dimensional view.

Fill Area Layout and Clear Area Layout

The new ClearAreaLayout algorithm clears a user-specified area in an existing layout by moving elements. It is suitable if the rest of the layout should not change much but some free space is required, e.g., because new elements need to be inserted into the drawing or have been resized.

The new FillAreaLayout algorithm fills a user-specified area in an existing layout by moving elements into or towards it. It can make layouts around the specified area more compact and is suitable if, e.g., elements were removed from the graph or their size has changed substantially.

The following two new demos showcase the new layout algorithms:

• The new MarqueeClearAreaLayoutDemo shows how to make space in a diagram by dragging a marquee rectangle.
• The new FillAreaAfterDeletionDemo shows how to fill free space after deleting nodes using the FillAreaLayout algorithm.

Aggregation and Analysis of (Large) Graphs

Many new algorithms for analyzing graphs are now included, for example to detect components and clusters, to aggregate sub-graphs, and to calculate centrality values. In addition, the analysis algorithms now have the option to define a subset of the graph to work on. In detail, the new classes are:

• The new NodeAggregation class provides an algorithm that intelligently aggregates nodes of (large) input graphs. It does not require complex configuration and can be used without knowledge of specific clustering or aggregation techniques.
• The KCoreComponents class provides a component detection algorithm that finds k-cores.
• The classes LouvainModularityClustering and LabelPropagationClustering provide two new algorithms for cluster detection.
• The EigenvectorCentrality class offers a centrality algorithm that measures the influence of a node in a network based on the Eigenvector score.
• The PageRank class provides a centrality algorithm that calculates the so-called page rank for the nodes.
• The classes ChainSubstructures, CliqueSubstructures, CycleSubstructures, StarSubstructures, and SubtreeSubstructures provide new algorithms that detect isolated substructures like chains, cliques, cycles, stars, or subtrees. This can be used as an input to other (layout) algorithms.
• The class GraphStructureAnalyzer now offers additional methods to calculate the average degree, the average weighted degree, the diameter, and the density of a given graph.

Support for Curved Edges

The new BezierEdgeStyle renders edges with smooth Bezier-curve paths.

In addition, the new edge label models BezierEdgePathLabelModel and BezierEdgeSegmentLabelModel place labels optimally on curved edges rendered with this style.

Support for curved edges has been added to the layout and edge routing algorithms EdgeRouter and the CurveRoutingStage, and HierarchicLayout.

Interactive Node Resizing

Resizing nodes using their handles now supports two new behaviors:

• Center resizing keeps the center fixed and scales the node in all directions. It is active when the NodeReshapeHandleProvider#CenterReshapeRecognizer is triggered which defaults to the Alt key held down.
• Aspect ratio resizing maintains the aspect ratio of a node. It is active when the NodeReshapeHandleProvider#RatioReshapeRecognizer is triggered which defaults the Shift key held down.
• The NodeReshapeHandleProvider#ReshapePolicy property determines how the mouse location is interpreted when aspect ratio resizing is active.

The ReshapeHandleProviderDemo showcases these different resizing behaviors.

Graph Builder

The new GraphBuilder, TreeBuilder, AdjacencyGraphBuilder have been added. These new classes facilitate building graphs from arbitrary data:

• GraphBuilder can be used when the data consists of one or more collections of nodes, edges, and optionally, groups.
• TreeBuilder can be used when the data consists of one or more collections of nodes, each of which knows its child nodes, and optionally, groups.
• AdjacencyGraphBuilder can be used when the data consists of one or more collections of nodes, each of which knows its neighbors, and optionally, groups.

New Features

Graph

• The new NodeLabelModelStripeLabelModelAdapter class allows using node label model parameters for the positioning of the row and column labels of a table.

Algorithms

• New methods of the GraphChecker and Groups classes compute several additional network statistics, namely GraphChecker#getAverageDegree, GraphChecker#getAverageWeightedDegree, GraphChecker#getDiameter, GraphChecker#getDensity, and Groups#getModularity.
• The new NodeAggregation class provides an algorithm that intelligently aggregates nodes of (large) input graphs. It does not require complex configuration and can be used without knowledge of specific clustering or aggregation techniques.
• The new Transitivity#TransitiveEdges method creates the transitive edges that connect the visible nodes in an input graph.
• The new GraphConnectivity#kCore overloaded methods compute the so-called k-cores of an undirected input graph.
• The new Centrality#eigenvectorCentrality method computes the eigenvector centrality for each node in an undirected graph.
• The new Centrality#pageRank method provides an implementation of the page rank algorithm that computes a rank for each node.
• The new Groups#labelPropagation method implements the label propagation algorithm which detects communities in the input graph.
• The new Groups#louvainModularity method detects the communities of an input graph by applying the well-known Louvain method for community detection.
• The new Groups#getClusteringCoefficient method computes the local clustering coefficient for each node as well as the average clustering coefficient.
• The new Substructures class offers methods to detect the following graph structures: Chains, Cliques, Cycles, Stars, and Trees.

Layout

• The new routing style EdgeRoutingStyle#CURVED of the HierarchicLayout class results in edge paths that consist of smooth curves that are constructed using cubic bezier splines.
• The new property EdgeLayoutDescriptor#RoutingStyle allows specifying the routing style individually for each edge routed by the EdgeRouter class. Furthermore, the new properties MaximumOctilinearSegmentRatio and PreferredOctilinearSegmentLength on the descriptor provide means to configure the octilinear routing style.
• The EdgeRouter class now supports a new routing style that generates curved edge paths. It can be specified for each edge individually using the EdgeRoutingStyle#CURVED enum value.
• The new layout stage CurveRoutingStage replaces polyline edge paths with curved segments using cubic bezier splines and provides a generic way to produce layouts with curved edges.
• The CircularLayout class now supports exterior edges that are routed around the exterior of the circle as smooth arcs. This can be specified with the new CircularLayout#EdgeRoutingPolicy property.
• The new EdgeBundlingStage class offers edge bundling for general undirected graphs. Bundling together multiple edges means that their common parts are to some degree merged into a bundled part. Edge bundling is useful to increase the readability of graph drawings with a high number of edges that connect a comparably small number of nodes.
• The RadialLayout class now supports a user-defined layer/circle assignment strategy. This can be specified with the LayeringStrategy#USER_DEFINED enum value and the layout data property RadialLayoutData#LayerIds.

Improvements

• IListEnumerable#create can now be called with any Iterable instead of only with Lists.
• The license mechanism now only logs license messages when no valid license has been found. Previously it was also logged to System#err that a license is valid.
• Added property LicensePath to class LicenseConfig to support license files in places other than the classpath root.

Graph

• The ITable#addLabel method no longer accepts label model parameters that do not support IStripe instances. Previously node label models could be used, but did not work properly at runtime.
• The default method getPathPoints was added for the IEdge interface. The returned IListEnumerable contains a snapshot of the source port location, followed by the bend locations, followed by the target port location of an edge.
• The FilteredGraphWrapper class now has a new overload without the edge predicate, which often just returns true anyway.
• GraphMLIOHandler has been improved to prevent external entity injection attacks by default. To prevent these attacks, GraphMLIOHandler disallows DTD declarations in read XML documents.
• Added new method setDisposeCallback to classes AbstractJComponentLabelStyle, AbstractJComponentNodeStyle, AbstractJComponentPortStyle, and AbstractJComponentStripeStyle. This method enables client code to register a callback for freeing resources that have been allocated in method createComponent once the created component is no longer used.

View

• The CanvasComponent#updateContentRect method now throws an IllegalStateException if an element on the canvas provided invalid bounds, e.g. one with infinite values.
• The CanvasComponent#fitContent method now respects the LimitedFitContentZoom property if a ViewportLimiter is enabled.
• A new policy has been added to the ViewportLimiter class which allows for zooming and panning towards the limits but not away from them. This prevents the viewport from "jumping" from out-of-limit coordinates into the limited bounds.
• The methods raise, lower, toFront and toBack on class GraphModelManager are not final anymore, thus, can now be overridden.
• The new GraphModelManager#ProvideUserObjectOnMainCanvasObject property can be set so that a model is accessible as its main canvas object's user object.
• The classes DefaultFolderNodeConverter and AbstractFoldingEdgeConverter provide a new protected method createPreferredLabelSize to allow for overriding the default implementations.
• The classes NodeStyleLabelStyleAdapter, NodeStylePortStyleAdapter, and NodeStyleStripeStyleAdapter now propagate the tags of labels, ports, and stripes to the node that's rendered with the node style.
• The GridVisualCreator class can now draw only horizontal lines or only vertical lines when its GridStyle property is set to one of the new enum values GridStyle#HORIZONTAL_LINES or GridStyle#VERTICAL_LINES.
• The property GridVisualCreator#GridRenderPolicy has been added and can be used to switch between a high-quality and a fast-performing rendering.
• OverviewInputMode now has a protected method updateVisibleArea which is the callback that fits the client canvas' content rectangle into the overview again after it has changed.
• An Animation can now be paused and unpaused by setting the Paused property on the Animator class after the animation has started.

Projections Feature

• The image export and printing classes (ContextConfigurator, PixelImageExporter, XpsExporter, CanvasPrintDocument, CanvasComponent#Print) have been improved to work better with the new Projections feature by being able to define an arbitrary list of points as well as the projection that should be used for export/printing. The export chooses the exported area in a way that all these points are enclosed in a rectangular area which is axis-parallel to the output coordinates under the given projection.
• The property CanvasPrintable#PrintPoints was added and contains the points in world coordinates which determine the region to print. The property PrintRectangle that was previously used to determine the world bounds to print now delegates to PrintPoints.
• The CanvasComponent class has additional methods to convert between the world, the new intermediate, and the view coordinate system.
• The MarqueeSelectionInputMode, NavigationInputMode, and HandleInputMode classes now have a property UseViewCoordinates, which controls whether the input mode draws its decorations and processes input in view coordinates.
• When the MarqueeSelectionInputMode class uses view coordinates, the resulting shape of the marquee in world coordinates may not be a rectangle. Therefore the MarqueeSelectionEventArgs class now has a Path property of type GeneralPath to describe the marquee shape and a UsePath property that determines whether the Path property or the Rectangle property shall be used.
• MarqueeSelectionInputMode now has a property SelectionPath that returns a GeneralPath representing the current or last selection rectangle in world coordinates. This is necessary for projections where the marquee selection rectangle is not a rectangle in world coordinates.
• The EdgeDecorationInstaller, RectangleIndicatorInstaller, PointSelectionIndicatorInstaller, and DefaultPortCandidateDescriptor classes now have a property UseViewCoordinates that controls whether the decoration is rendered in view coordinates.
• The CreateEdgeInputMode#measureDistance method now has to return the distance in view coordinates if and only if CanvasComponent's Projection is used.
• The IRenderContext interface now has the following additional members that are useful with the new projections feature: getProjection, getToIntermediateTransform, worldToIntermediateCoordinates, and intermediateToViewCoordinates.

Input

• It is now easier to customize the GroupingNodePositionHandler class. The boolean properties AdjustingParentNodeLayoutEnabled, MovingChildNodesEnabled and ReparentingEnabled have been added to control whether an ancestors' node layout should be adjusted when a node is moved, to not move the contents of a group node when a group node is moved or forbid any interactive reparenting.
• The GraphEditorInputMode#requeryHandles method has been made public and can now be used to refresh the displayed handles, if IHandleProvider implementations return different handles over time.
• The GraphClipboard and GraphEditorInputMode classes now provide the new ElementsDuplicated event that occurs when a duplicate operation finished successfully.
• The undo and redo methods of the UndoEngine class now throw an IllegalStateException if the current state does not allow performing undo or redo. Previously either UnsupportedOperationException or RuntimeException have been thrown.
• The default position handler for edges now creates fewer additional bends when the edge is dragged while orthogonal edge editing is enabled.
• A MaximumBoundingArea can now be set on the classes AbstractReshapeHandleProvider, ReshapeHandlerHandle, RectangleHandle, and ReshapeRectangleContext to restrict reshaping to stay inside the given bounds.
• The ReshapeHandlerHandle class has new getters for the IReshapeHandler and the HandlePositions.
• The new NodeDecorator#ReshapeHandlerDecorator property simplifies using custom IReshapeHandler implementations for nodes.
• The new ReshapeRectangleContext#Ratio property specifies the width/height ratio that is kept for aspect ratio resizing.
• The new classes NodeReshapeHandleProvider and NodeReshapeHandlerHandle are used as default implementation for node resize handles.
• With the new ReshapeRectangleContext#ReshapePolicy property, INodeReshapeSnapResultProvider implementations can respect the node aspect ratio for according resize gestures.
• The new NavigationInputMode#fitContent method is called after collapse, expand, enter, and exit operations if the FitContentAfterGroupActions property is enabled.
• The NavigationInputMode class doesn't fit the content anymore after expand and collapse operations if an AutoGroupNodeAlignmentPolicy other then NONE is used.
• An optional parameter preferredSnapType has been added to the SnapLineSnapResult constructor and the SnapResults#createSnapLineSnapResult factory method.
• The new factory method OrthogonalEdgeEditingContext#createOrthogonalEdgeDragHandler can be used for custom node position handler and reshape handler to keep orthogonal edges attached to a node orthogonal during the drag/reshape gesture.
• The properties GridSnapDistance and GridSnapType of the GraphSnapContext class have been pulled up to the SnapContext class.
• The zoom-invariant GridSnapDistance property has been added to the CollectSnapResultsEventArgs class.
• The SnapResults#createResizeSnapResult method now takes a PointD as delta parameter instead of a double so it is possible to create resize snap results where the orientation of the mouse delta differs from the orientation of the snapped size.
• Class ResizeStripeInputMode now has an IsDragging property, indicating whether a drag currently is in progress.
• Class DropInputMode now has an IsDragging property, indicating whether a drag on the canvas currently is in progress.
• Class HandleInputMode now has an IsDragging property, indicating whether a drag currently is in progress.
• The CompositeLabelModel class now supports label snapping.
• The default data flavor for LabelDropInputMode, NodeDropInputMode, PortDropInputMode, and StripeDropInputMode now uses the class loader associated to ILabel, INode, IPort, and IStripe respectively instead of the system class loader.
• The new ClickListenerDecorator property of Bend-, Edge-, Label-, Node- and PortDecorator simplifies using custom IClickListener implementations.

Geometry

• The new method PointD#interpolate calculates the linear interpolation between two points.
• GeneralPath has a few new helper methods, mostly related to cubic Bézier curves:
  • findCurveIntersection finds the intersection between a cubic Bézier curve and the path.
  • getCubicSplitPoints determines new control points for splitting a cubic Bézier curve.
  • getProjection calculates the projection of a point onto a specific segment of the path.

Analysis

• Most of the algorithms in namespace Analysis provide properties SubgraphNodes and SubgraphEdges which facilitate to analyze only a subset of the given graph.
• The GraphStructureAnalyzer class has now methods to determine whether there are multiple edges between the same pair of nodes.
• The GraphCentrality and ClosenessCentrality analysis algorithms now calculate the centrality individually per component instead of returning a centrality value of 0.0 for nodes in graphs that are not connected.
• In a single node graph, the single node's closeness centrality and graph centrality value is now 1.0. (Previously, it was infinity.) This also affects derived values such as minimum, maximum, and normalized centrality. The backing algorithms in the Centrality class are unchanged.
• When EdgeBetweennessClustering and FeedbackEdgeSet are executed, the specified edge weights are checked and in case they are not positive or finite, an IllegalStateException is thrown.

Layout

• Frequently used types of the layout part have now nullability annotations.
• The DefaultPortAllocator class has a new property ConsiderFixedPorts that allows to specify whether edges with strong port constraints or fixed port candidates should be considered during the port assignment. Previously, such edges were ignored which could lead to intersections with the ports of the other edges. This new feature is enabled by default.
• The EdgeRouter class now provides an improved support for early exits. The routing algorithm now often reacts more sensibly to the case that the specified MaximumDuration is reached.
• If the EdgeRouter algorithm runs with highly restricted time (see EdgeRouter#MaximumDuration) or when it gets stopped by means of AbortHandler, it now keeps the minimum edge to edge distance better.
• The PartialLayout class now produces more stable results if it is multiple times applied to the same input graph and property SubgraphPlacement is set to SubgraphPlacement#FROM_SKETCH.
• The HideGroupStage class now offers a new property ResetEdgePaths that allows to specify whether or not the stage resets the path of edges incident to group nodes.
• The ComponentLayout class now correctly considers node and edge labels when using the packed layout styles, e.g., ComponentArrangementStyles#PACKED_RECTANGLE or ComponentArrangementStyles#PackedCircle. Previously, labels could overlap other elements when using these component arrangement styles.
• Constructor overloads have been added to classes SingleItem, ItemCollection, ItemMapping, and ContextItemMapping that initialize one of their properties on construction.
• The LayoutExecutor class now generates more specific port constraints with the FixPorts property enabled, resulting in better edge paths.
• If the Mapper property of class HierarchicLayoutData#EdgeDirectedness is directly accessed (not explicitly set) its default for unset values is 1.0 (directed edge).
• If the Mapper property of class OrganicLayoutData#GroupNodeModes is directly accessed (not explicitly set) its default for unset values is GroupNodeMode#NORMAL. This doesn't change the result of the layout.
• For the RootPlacements, SubtreeRoutingPolicies, and SubtreeAspectRatio properties of the AspectRatioTreeLayoutData class, the type of the mapped values has been made nullable. For null or unset values, the settings on the AspectRatioTreeLayout will now be taken.
• Relaxed the strict type requirements for IncrementalHintItemMapping's setIncrementalSequencingItems(Iterable) overload to accept specific IModelItem sub-types as well.
• Relaxed the strict type requirements for LayoutData setter overloads that take mappings of one kind or the other to accept sub-types of the required value type. This also applies to LayoutExecutor#setPortLabelPolicies and LayoutGraphAdapter#setPortLabelPolicies.

Bugfixes

View

• Layout animations for graphs with ports that are owned by edges no longer throw an exception.
• An animation created with the Animations#createGraphAnimation method no longer throws an exception if the provided IMapper with new bend locations doesn't provide bend locations for all edges.
• The ViewportAnimation no longer throws an Exception when applied on a zero-size GraphComponent.
• Fixed a bug which caused the ZOOM_TO_CURRENT_ITEM command to ignore the ViewportLimiter of the corresponding CanvasComponent.
• The CanvasComponent#zoomTo method no longer triggers two ViewportChanged events.
• Scrolling the viewport with the mouse wheel no longer scrolls in the wrong direction if the mouse wheel is set to scroll one page at a time (instead of several lines).
• The GraphModelManager#getMainCanvasObject method no longer throws a NullPointerException when overriding its getCanvasObject methods for items in an unexpected way.
• Due to better null checks, several styles and input modes no longer throw an exception in the rare case that an IRenderContext doesn't provide a CanvasComponent instance.
• Fixed a bug in FoldingManager where a predicate change in a FilteredGraphWrapper which serves as MasterGraph could trigger an Exception if a child of a folder node has been hidden.
• The methods ICanvasObject#above and below don't unnecessarily trigger IRenderContext#ChildVisual anymore.
• Callbacks registered via IRenderContext#setDisposeCallback are now always called when the visual was disposed. Previously there have been some cases, such as creating visuals outside of rendering (e.g. for measuring), where the callback would never be called.
• Edges between deeper nested nodes are now displayed correctly in front of a common ancestor after that ancestor has been added or removed.
• Fixed a bug in the GraphCopier class which caused the LabelCopied event to be dispatched twice for port labels on folder nodes.
• Fixed a bug in the visualization of the snapping of resized nodes. Due to the bug the arrows indicating that the width or height of the node equals the width or height of other nodes were only rendered at the resized node but not at the other nodes with same width or height.
• The file chooser dialogs shown from GraphComponent's openFile and saveFileAs methods now respect the filter values specified for CanvasResources' GraphComponent#OpenFileDialog#Filter and GraphComponent#SaveFileDialog#Filter resource keys.

Input

• Calling the GraphInputMode#findItems and GraphInputMode#HitTester#enumerateHits methods with a custom IInputModeContext will now always pass that context to the IHitTestable implementations of the items being hit-tested. Previously, the main input mode's own IInputModeContext was used in certain cases.
• The paste and duplicate operations now honor the GraphEditorInputMode#shouldSelect predicate.
• The NodeDropInputMode class now correctly considers port labels, both for creating the new node and for the preview.
• The ICommand#SET_CURRENT_ITEM command can now also be used to “reset” the current item to null by passing null as the command parameter. This also fixes that the NavigationInputMode#SetCurrentItem and GraphInputMode#SetCurrentItem methods did nothing when null was passed as an argument.
• The TextEditorInputMode class now correctly queries the ViewportLimiter if TextBoxPlacementPolicy#SCROLL_CANVAS is used. If the text box is still not visible because it's outside the limited viewport, the text box will be moved as well.
• Undo and redo of additions and removals of bends on folding edges now correctly restores the bends at the location they had at the time of removal.
• The NavigationInputMode#FitContentAfterGroupActions property is no longer ignored when the NavigationInputMode class is used as a child input mode of the GraphEditorInputMode class.
• The NavigationInputMode class now also updates the CanvasComponent#ContentRect property when it is not used as a child input mode of the GraphEditorInputMode class.
• The SnapContext#GridSnapDistance and SnapContext#SnapDistance properties are no longer incorrectly interpreted in world coordinates when calculating SnapResults.
• MouseWheelEventArgs are now set to Handled = true when CanvasComponent scrolls or zooms to avoid those events from bubbling to parent controls.
• Orthogonal edge editing does not add bends anymore to edges that are marked as not orthogonal.
• Input modes are no longer left in an undefined state if another input mode has been activated in an event handler of the first input mode. This usually resulted in the wrong cursor being displayed.

Geometry

• Fixed the MaxX and MaxY properties of RectD#INFINITE which now return Double#POSITIVE_INIFINITY instead of NaN. In turn, RectD#INFINITE's TopRight, BottomRight, and BottomLeft corners were fixed, too.

Analysis

• The EdgeBetweennessClustering#run method no longer throws an exception with its default setting for the MaximumClusterCount property.
• The Manhattan distance metric for HierarchicalClustering no longer ignores the vertical distance component.
• The HierarchicalClustering class no longer throws an exception when applied to an empty graph.
• The results of the Chains class are now correct for undirected cycles, too. If such cycles are not connected to other parts of the graph, the Nodes collection of a resulting Path could have been in an incorrect order.
• The ClosenessCentrality class no longer calculates NaN as result of the NormalizedNodeCentrality property if the graph consists of one single node. Instead, the value of the NormalizedNodeCentrality property is now positive infinity.
• The ClosenessCentrality#run method no longer throws an exception for unconnected graphs. Instead, all values of the NodeCentrality and NormalizedNodeCentrality properties will be 0.0 as the documentation states.
• A number of spurious NullPointerExceptions in various graph analysis algorithms do no longer happen when configuring them with a Mapper that doesn't have an explicit value for every node/edge in the graph.

Layout

• The morphLayout and LayoutExecutor#start methods no longer throw an exception when applied on a zero-size GraphComponent.
• Fixed a bug in ItemCollectionMapping that could result in a NullPointerException for added ItemCollections where no items were specified.
• The HierarchicLayout class now correctly handles inputs that have both bus structures and edges with recursive style. Previously, an exception could be triggered when an edge was marked as recursive and belonged to a bus at the same time.
• The HierarchicLayout class no longer throws an exception that was previously triggered in some cases with bus structures (see property HierarchicLayoutData#Buses) and in conjunction with layering constraints.
• Fixed a bug in the HierarchicLayout class that in some cases caused a violation of the minimum first or last segment length (EdgeLayoutDescriptor#MinimumFirstSegmentLength and EdgeLayoutDescriptor#MinimumLastSegmentLength). The bug was only triggered when the minimum length values were relatively large.
• The OrganicLayout class no longer throws an exception when having a PartitionGrid and at the same time the scope set to SUBSET or MAINLY_SUBSET where all nodes of the graph are marked as affected (could have used scope ALL instead).
• The EdgeRouter class no longer produces unnecessary overlaps for cases where the source or target node is overlapped by (several) label elements. This generally improves the ability of the router to deal with input that contains source/target nodes that are overlapped by other elements and are required to be crossed by an edge route.
• The EdgeRouter class no longer throws an exception when EdgeLayoutDescriptor#IntermediateRoutingPoints are too close together.
• The EdgeRouter class no longer has a problem that appeared with a bus containing affected as well as non-affected (fixed) edges at the same time. Previously, this could trigger an exception or lead to the incorrect behavior that an actually affected other edge was not routed.
• The EdgeRouter class no longer occasionally throws an exception if the input contains bus edges defined via BusDescriptor.
• The EdgeRouter class no longer has a problem that occasionally resulted in bad edge routing artifacts if edge grouping is enabled and non-affected edges are grouped at both end points.
• The EdgeRouter class no longer yields edge labels that overlap with unrelated group nodes when using the integrated label placement feature.
• Resolved a bug in the EdgeRouter class which caused that grouped edges were sometimes actually not grouped together. This mainly appeared in conjunction with a large value of either the minimum first or last segment length.
• The EdgeRouter class no longer produces an exception for some rare cases with fixed grouped edges and octilinear paths.
• The EdgeRouter class now correctly observes inputs where the user specifies buses with both fixed and non-fixed edges at the same time.
• The EdgeRouter class now properly considers ports provided by a PortCandidateSet when the set contains multiple candidates with single capacities and where the candidates are on the same node side. Previously, it could happen that only one of several edges connecting to the node correctly considered the ports.
• The EdgeRouter class does no longer use the same fixed PortCandidate out of a specified PortCandidateSet if another non-saturated candidate can be chosen. Thus, overlapping edge segments are avoided.
• The EdgeRouter class no longer occasionally throws an exception if the input contains bus edges (defined via BusDescriptor).
• The BusRouter class no longer fails to generate connected buses for cases with fixed and incremental edges on the same bus. Previously it sometimes generated a disjoint bus even though the bus IDs were equal.
• The BusRouter class no longer ignores edges that should be routed when a they are on a bus with fixed edges (see BusDescriptor#Fixed property) and when they share both source and target port with a fixed edge.
• The element processing order in the BendConverter layout stage is now deterministic. The previous non-deterministic order of inserting and removing elements could lead to non-deterministic behavior for consecutive layout calculations.
• The ParallelEdgeRouter class no longer throws an exception if the input has both a large number of parallel edges and a leading edge with ports on the node border.
• The OrthogonalLayout class now correctly handles input graphs with parallel edges if the PreferParallelRoutes property is enabled. Previously, such inputs have caused exceptions in some rare cases.
• The FamilyTreeLayout class now properly handles the case that the family tree contains cycles, e.g., due to a family founded by parent and (step-)child. Previously, it sometimes produced a stack overflow or non-orthogonal routes for such an input.
• The AspectRatioTreeLayout class no longer crashes, causing a stack overflow, when applied to a large chain graph.
• The AbstractNodePlacer#placeSubtree method now clears its internal caches, especially the graph cached in field AbstractNodePlacer#graph. Previously, holding onto a node placer instance could lead to subtle memory leaks.
• The OrthogonalSegmentDistributionStage no longer produces degenerated (very large or small) coordinates for edges that contain zero-length segments, that is, duplicate edge path points.
• The ChannelEdgeRouter class no longer yields degenerated routing results (very large or small coordinates) when using the OrthogonalPatternEdgeRouter as path finder strategy and setting its minimum distance to zero. The OrthogonalPatternEdgeRouter class now avoids duplicate points when the MinimumDistance property is set to zero.
• The RecursiveGroupLayout class now correctly moves child nodes along with their group also in case the RecursiveGroupLayout#CoreLayout is null. Previously, if additionally a group node had a specific layout algorithm associated to it, the content was not correctly moved along. If the core layout was not null, the issue did not occur.

Incompatible Changes

API

• The GraphBuilder, TreeBuilder, and AdjacentNodesGraphBuilder in the com.yworks.yfiles.graph package have been replaced with incompatible, new implementations in the com.yworks.yfiles.graph.builder package. API-compatible adapters to the old API can be found in the builder.compatibility demo.
• The return type of ContextConfigurator's createClip method has been changed from RectD to Shape. The return value of this method is intended to be passed to Graphics2D#clip(Shape) to constrain the painting area.
• The method CanvasComponent#createInputModeContext is protected again, after having been made public accidentally previously.
• The GraphEditorInputMode#requeryHandles method is now public.
• The optional IPortLocationModelParameter and IPortStyle parameters of the IGraph#addPort and GraphExtensions#addPort methods can now be null.
• The ModelManager#unInstall method has been renamed to the canonical name uninstall.
• The NodeReshapeSnapResultProvider#getSnapLines method now takes CollectSnapResultsEventArgs as additional parameter.
• Several methods related to snapping now take a PointD instead of a double as delta parameter. In detail, these are SnapResults#createResizeSnapResult, NodeReshapeSnapResultProvider#addSnaplineSnapResult, NodeReshapeSnapResultProvider#addGridLineSnapResult, and NodeReshapeSnapResultProvider#addSameSizeSnapResult.
• The following methods now require an IRenderContext instance as first parameter: AbstractLabelStyle#createLayoutTransform and JComponentLabelStyleRenderer#createLayoutTransform.
• All overloads of YGraphAdapter#createMapper now require an additional parameter specifying the Class of the type argument. This is required for correct fallback values if an item is not explicitly mapped.
• CanvasPrintable#getWorldBounds now returns an Iterable of PointD instead of a RectD to suit the new projection feature.
• IGraph methods getBends, getEdgeLabels, getNodeLabels, and getPortLabels have been changed to return a "live" view of corresponding objects in the graph. Previously, these methods returned a cached view. This change necessitated changing the return type of these methods from IListEnumerable to IEnumerable.
• The HierarchicalClustering#Result#DendrogramRoot property can now return null if the result has been obtained from an empty graph.

Behavior

• The view coordinate system now includes the projection. For customers who do not use a projection, nothing will change. However, when the (old) view coordinate system has been used to render parts of the visualization in a zoom-invariant manner, the equivalent now is called the intermediate coordinate system. The view coordinate system is still necessary when coordinates relative to the control are needed, e.g. for tooltips or a context menu.
• When using the new projections feature, the CanvasComponent#ContentRect property no longer has an effect on scrollbars or the GraphComponent#fitGraphBounds method.
• The CanvasComponent class ignores its ViewportLimiter when projections are used.
• The ViewportLimiter no longer jumps to the limited viewports if the current viewport is outside the limited area. This behavior can be restored by setting the ViewportLimiter#LimitingPolicy property to LimitingPolicy#STRICT.
• Visuals that are rendered in view coordinates relative to the viewport may appear in a different location when exporting an image.
• The NavigationInputMode#adjustContentRect method doesn't fit the graph bounds in the viewport anymore.
• NavigationInputMode#FittingContentAfterGroupActionsEnabled now is false by default.
• The NavigationInputMode class doesn't fit the content after expand and collapse operations anymore. This can be re-enabled by setting the AutoGroupNodeAlignmentPolicy to a value other than NONE and FittingContentAfterGroupActionsEnabled to true.
• For the RootPlacements, SubtreeRoutingPolicies, and SubtreeAspectRatio properties of the AspectRatioTreeLayoutData class, the type of the mapped values has been made nullable. For null or unset values, the settings on the AspectRatioTreeLayout will now be taken. This is the documented behavior, though.
• GraphMLIOHandler has been improved to prevent external entity injection attacks by default. To prevent these attacks, GraphMLIOHandler disallows DTD declarations in read XML documents.
• Added file filters for XML files and all files to the file chooser dialogs shown from GraphComponent's openFile and saveFileAs methods.
• IGraph methods getBends, getEdgeLabels, getNodeLabels, and getPortLabels have been changed to return a "live" view of corresponding objects in the graph. Previously, these methods returned a cached view. This change necessitated changing the return type of these methods from IListEnumerable to IEnumerable.
• The following places now throw a ConcurrentModificationException instead of an IllegalStateException:
  • IGraph: changing graph items while iterating those using the IListEnumerable returned by IGraph#getNodes or IGraph#getEdges.
  • IGraph: changing the bends, labels, or ports at an edge while iterating those using the IListEnumerable returned by the respective getBends, getLabels, or getPorts method.
  • IGraph: changing the labels or ports at a node while iterating those items using the IListEnumerable returned by the respective getLabels or getPorts method.
  • IGraph: changing nodes while iterating those using the IListEnumerable returned by IGraph#getChildren.
• The GraphCentrality and ClosenessCentrality analysis algorithms now calculate the centrality individually per component instead of returning a centrality value of 0.0 for nodes in graphs that are not connected.
• HierarchicLayoutData#EdgeDirectedness: If the Mapper property is directly accessed (not explicitly set), its default for unset values is now 1.0 instead of 0.0. These means that such edges are now treated as directed instead of undirected.
• The value of the read-only property EdgeRouter#Partition is now null after applying the routing algorithm. It is only intended to be used during the execution. Previously, it was cached, even though the documentation stated otherwise.

Deprecations

• The properties EdgeRouter#PolylineRouting, EdgeRouter#PreferredPolylineSegmentLength and EdgeRouter#MaximumPolylineSegmentRatio are now deprecated. To enable polyline routing, specify EdgeRoutingStyle#OCTILINEAR as routing style via EdgeLayoutDescriptor#RoutingStyle. The other two properties are also replaced by respective properties on the EdgeLayoutDescriptor class.

New Demos

• The GanttChartDemo shows how to create a project schedule visualization.
• The ZoomInvariantLabelStyleDemo demonstrates zoom-invariant label rendering.
• The MarqueeClearAreaLayoutDemo shows how to make space in a diagram by dragging a marquee rectangle.
• The FillAreaAfterDeletionDemo shows how to fill free space after deleting nodes using the FillAreaLayout algorithm.

Demo Improvements

• The IsometricDrawingDemo has been reworked to use the new projections functionality (see also the Major New Features section).
• The LayoutStyles demo has been enhanced to include new layout features:
  • Exterior edge routing for CircularLayout.
  • Curved edge routing style for HierarchicLayout and Polyline EdgeRouter.
  • Bus routing for HierarchicLayout and Polyline EdgeRouter.
  • Integrated Edge Labeling for Polyline EdgeRouter.
• Improved support for parsing the BPMN Diagram Interchanged format.
• The BPMN node styles now support setting colors.
• The BPMN demo has been improved to provide more flexibility. Its code now can easier be used in custom projects.
• BpmnDiParser has been improved to prevent external entity injection attacks by default. To prevent these attacks, BpmnDiParser disallows DTD declarations in read XML documents.

Bugfixes

• IFoldingView#Collapse and #Expand now throw an IllegalArgumentException when called with a node not belonging to the graph (instead of a NullPointerException).
• CollapsibleNodeStyleDecorator: When the wrapped style has its own IClickListener defined in its lookup, the IClickListener for the collapse/expand button has precedence but the other one is used when the button is not hit.
• FoldingManager#hasFoldingEdgeState now returns false for non-dummy edges instead of throwing an exception.
• FilteredGraphWrapper: Fixed a possible IllegalArgumentException ("Node not in this graph") which could occur when the parent of a node which is not visible in the filtered graph has been changed in the wrapped graph.
• FoldingManager#getFoldingEdgeState now throws an IllegalArgumentException with a meaningful message instead of a NullPointerException if the state is queried for a master edge (both source and target node are expanded).
• Fixed a bug in TableLayoutConfigurator which in rare cases could cause exceptions in additional layout stages.
• ILabelCandidateDescriptor's #getProfit now is considered properly by the labeling algorithms.
• FoldingManager: Invoking #hasFoldingEdgeState for a master edge (both source and target are expanded) yields now an IllegalArgumentException with an explaining message text instead of throwing a simple NullPointerException.
• Fixed an issue where NavigationInputMode's #AutoGroupNodeAlignmentPolicy would sometimes not work when the expanded and collapsed group node sizes differ.
• The FilteredGraphWrapper class now correctly handles port labels of filtered items.
• The GeneralPath#prepend method no longer loses a part of the combined path in certain circumstances.
• GraphMLIOHandler: Fixed an error that prevented parsing null values by input handlers added via #createMapperInputHandler.

Layout

• Fixed a bug in the HierarchicLayout class that could cause unnecessary (double) edge crossings when the algorithm was executed in incremental layout mode with edge grouping and alternative group bounds.
• The EdgeRouter class now correctly observes fixed ports for some cases where it previously ignored them due to incorrect path cost calculations.
• The EdgeRouter class now considers the correct shape of non-affected, fixed edges. Previously, it sometimes incorrectly parsed their shape which could lead to undesired effects like incorrect path cost calculation of affected edges.
• The BalloonLayout class now longer crashes due to a stack overflow for inputs containing very long chain graphs.
• The HierarchicLayout class now produces better results for input graphs with grouped edges and a PartitionGrid. Previously, such inputs may have produced edge routes with superfluous bends.
• The HierarchicLayout class now correctly considers the properties MaximumNodesAfterBus and MaximumNodesBeforeBus of the BusDescriptor for single line (layer) buses. In addition, for multiple layer buses, the specified minimum node to edge distance is now considered for the distance between nodes and the vertical bus segment.
• The OrganicLayout class now correctly removes node overlaps if its Scope is set to and its NodeOverlapsAllowed property is disabled. Previously, the layout sometimes produced superfluous overlaps for such cases.
• The TreeMapLayout class no longer produces results that may have infinite coordinates.
• The HierarchicLayout class no longer throws an exception that was previously triggered in some cases with bus structures (see property HierarchicLayoutData#Buses) and in conjunction with undirected edges (see HierarchicLayoutData#EdgeDirectedness).
• The constants EdgeLabelLayoutDpKey and NodeLabelLayoutDpKey of the LabelLayoutKeys class now specify correctly that their generic type parameter is LabelLayoutData[] and not just LabelLayoutData.

Input

• Fixed that NavigationInputMode ignores the #shouldSelectItem and #shouldFocus predicate methods of GraphEditorInputMode and GraphViewerInputMode.
• Fixed a bug that executed commands on keypress although the KeyboardInputMode is not enabled.

Incompatible Changes

• FoldingManager#getFoldingEdgeState now throws an IllegalArgumentException instead of a NullPointerException if the state is queried for a master edge (both source and target node are expanded).
• FoldingManager#hasFoldingEdgeState now throws an IllegalArgumentException instead of a NullPointerException if the state is queried for a master edge (both source and target node are expanded).
• FoldingManager#hasFoldingEdgeState now returns false for non-dummy edges instead of throwing an exception.

Demos and Tutorials

The Getting Started and Custom Styles tutorial trails have been moved into the demos directory to simplify project setup for yFiles for Java (Swing)'s programming samples in IDEs.

New Demos

• The LabelHandlerProviderDemo shows how to implement custom handles for interactive rotation and resizing of labels.
• The SplitEdgesDemo shows how to align edges at group nodes using RecursiveGroupLayout together with HierarchicLayout.
• The EdgeGroupingDemo shows the effects of edge and port grouping when arranging graphs with HierachicLayout.
• The PartialLayoutDemo shows how to arrange some elements in a graph while keeping other elements fixed.
• The CriticalPathsDemo shows how to emphazise important paths with hierarchic and tree layout algorithms.
• The CustomLabelModelDemo shows how to create and use a custom label model.
• The SmartClickNavigationDemo shows how to navigate in a large graph, especially when only a part of the graph is visible in the viewport.
• The ToolTipDemo shows how to add tooltips to graph items.
• The GridSnappingDemo shows how to enable grid snapping during interactive changes.
• The SnappingDemo shows how to enable snapping (guide lines) for interactive changes.
• The LevelOfDetailDemo shows how to display different levels of detail depending on the current zoom factor.
• The FamilyTreeDemo uses FamilyTreeLayout to arrange genealogical graphs.
• The TreeMapDemo uses TreeMapLayout to arrange file system nodes.
• The TreeLayoutDemo shows the tree layout style and the different ways in which this algorithm can arrange a node and its children.
• The ClickableStyleDecoratorDemo shows how to handle mouse clicks in specific areas of a node's visualization.
• The BackgroundImageDemo shows how to add background visualizations to a graph component.
• The FilteringAndFoldingDemo shows how to configure filtering and folding in the same application.
• The FoldingDemo shows how to enable collapsing and expanding of group nodes.
• The FilteringDemo shows how to temporarily remove nodes or edges from the graph with filtering.
• The GraphCopyDemo shows how to copy a graph or part of it to another graph.

Major New Features

• A large number of code examples has been added to the API Documentation.
• The HierarchicLayout class is now able to arrange children of a specific root node in a compact bus-like way. These bus substructures are defined by the HierarchicLayoutData#Buses property, and the new BusDescriptor class provides more individual settings for the buses.
• The EdgeRouter class now features integrated edge label placement. Labels are automatically placed when the new property IntegratedEdgeLabelingEnabled is enabled. The placement considers the optional PreferredPlacementDescriptor of a label.
• The EdgeRouter class now supports port grouping of edges at their source and target. To specify the port group IDs, see the associated properties in the PolylineEdgeRouterData class.
• The EdgeRouter class now supports orthogonal bus routing. The new BusDescriptor class specifies the settings for a single bus.
• The powerful analysis algorithms got a new API that is based on the IGraph interface and streamlines working with the results. In particular, it makes working with a special analysis graph class obsolete. The algorithms that are available with the new API include centrality measures, clustering, flow calculation, rank assignment, spanning tree, shortest path, and more. This is accompanied by the new GraphStructureAnalyzer class that provides methods to check structural properties of a given graph.

New Features

Layout

• The HierarchicLayout class is now able to consider individual costs for crossing a group node border. These costs are defined with the HierarchicLayoutData#GroupBorderCrossingCosts property.
• The HierarchicLayout class is now able to consider individual crossing costs for edges. They can be defined with the HierarchicLayoutData#EdgeCrossingCosts property.
• The new callback method DefaultLayerSequencer#getCrossingCost allows for defining an individual crossing cost value for a specific pair of edges when using the said sequencer implementation for the HierarchicLayout algorithm.
• In order to easily retrieve the original edge instance when customizing the hierarchic layout algorithm, the HierarchicLayout#getOriginalEdge method was added.
• The HierarchicLayout class is now able to uniformly distribute ports at group nodes - with a few restrictions. The new property HierarchicLayoutData#UniformPortAssignmentGroups. defines the groups for which the feature should be enabled.
• The OrganicLayout class is now able to produce 3D layout results.
• The OrganicLayout class is now able to consider user-specified inertia and stress values for nodes.
• The new property InteractiveOrganicLayout#CompactnessFactor specifies the compactness of the result. If the graph contains several components, this feature can prevent that the components drift apart.
• The LeftRightNodePlacer class now supports layouts with multiple branches. With this feature, subtrees can not only be placed left/right of a single vertical bus, but left/right of multiple vertical buses (the branches). The new property BranchCount allows to configure the number of branches.
• The tree node placer GridNodePlacer offers the following new features:
  • The placement of the bus for routes to its children can now be configured using the new enumeration BusPlacement. Available placements are LEADING, TRAILING and CENTER.
  • Child sub-trees can be assigned to rows automatically using the new property GridNodePlacer#AutomaticRowAssignmentEnabled.
  • The new alignment policy GridNodePlacer#BUS_ALIGNED aligns the root node with the bus.
• The OrthogonalLayout class is now able to consider custom crossing and bend costs for edges. They can be specified using the new properties OrthogonalLayoutData#EdgeCrossingCosts and OrthogonalLayoutData#EdgeBendCosts respectively.
• The new class GivenCoordinatesStage changes node locations and edge paths to user-specified values before invoking the core layout algorithm. To specify locations and paths, use the new GivenCoordinatesStageData class.
• The new GenericPartitionGridStage class offers generic support for partition grid structures.

Viewer

• The GraphEditorInputMode class provides the new methods raiseSelection, lowerSelection, selectionToFront and selectionToBack that change the z-order of all selected IModelItems.
• The GraphModelManager class has the new methods raise, lower, toFront and toBack that allow for changing the z-order of IModelItems. All these z-order-related methods can also be triggered by the new commands RAISE, LOWER, TO_FRONT and TO_BACK.
• CreateEdgeInputMode can now create edges in reversed direction, i.e. starting from target port.
  • The new EdgeDirectionPolicy supports starting creation at source, target, in the last direction, or depending on the port candidate.
  • A configurable ToggleDirectionRecognizer allows for changing the edge direction during creation.
• The method CreateEdgeInputMode#doStartEdgeCreation that is used to programmatically start an interactive edge creation gesture now returns a Future with the newly created edge as result.
• The method MoveInputMode#doStartDrag that is used to programmatically start an interactive drag gesture now returns a Future with the affected items as result.
• The new property MoveLabelInputMode#MovingUnselectedLabelsAllowed enables moving labels without having to select them first.

New Demos

• The GraphAnalysisDemo shows how to use the new interfaces for the graph analysis algorithms and how to visualize their results.
• The LogicGateDemo shows how yFiles can be used for the visualization of a digital system consisted of logic gates.
• The Neo4jDemo shows how to integrate a Neo4j graph data base in your application.

Improvements

Algorithms

• The new GraphStructureAnalyzer class provides methods to check structural properties of a given graph.

Layout

• Added convenience overloads for ItemCollection and ItemMapping property setters to LayoutData classes with properties of type ItemCollection or ItemMapping. E.g. hierarchicLayoutData#getEdgeLayoutDescriptors().setConstant(newDescriptor) can now be abbreviated to hierarchicLayoutData#setEdgeLayoutDescriptors(newDescriptor).
• The HierarchicLayout class now correctly calculates the group node bounds. Previously, the groups' insets were slightly too large (up to one pixel).
• The HierarchicLayout class now always places a port in the middle of a node side, if it is the only port on that side. Previously the port was only centered if the label was additionally placed on the edge.
• The HierarchicLayout class now also considers critical edge priorities for grouped edges.
• The HierarchicLayout class now requires less memory for graphs with sequence constraints.
• The HierarchicLayout class now uses the specified layer alignment (see NodeLayoutDescriptor#LayerAlignment) to align sub-components (see HierarchicLayoutData#SubComponents).
• The HierarchicLayout class no longer inserts superfluous bends for edges between group nodes if the input graph contains grouped edges.
• With HierarchicLayout, the number of edges crossing through group nodes without starting or ending in them when using the default algorithm settings was reduced. Furthermore, the behavior can be customized using the new group node border crossing costs (see property HierarchicLayoutData#GroupBorderCrossingCosts).
• The HierarchicLayout class now also considers sequence constraints for grouped edges.
• The layering of HierarchicLayout was improved with respect to the resulting edge lengths if the recursive group layering is enabled.
• The HierarchicLayout class now produces less overlapping elements for graphs with fixed coordinate hints.
• The new property OrthogonalLayout#ParallelRoutesPreferenceEnabled allows for controlling how parallel edges (multi-edges) are routed.
• The RecursiveGroupLayout class now allows to define a local PartitionGrid structure for each recursively handled group node. See the new property RecursiveGroupLayoutData#GroupNodePartitionGrids for details.
• The EdgeRouter class now generates less edge-edge overlaps and a better distribution of edge segments when the EdgeRouter#MaximumDuration is strongly restricted or set to zero, or when the algorithm is stopped via the AbortHandler#stop method.
• The EdgeRouter class now avoids superfluous bends that were in some cases caused by group nodes with (small) inset values.
• The path search performance of the EdgeRouter class has been improved for cases where an edge has a strong, external PortConstraint or a fixed, external PortCandidate.
• The EdgeRouter now supports edge grouping on both endpoints. Previously, an edge could only be part of either a source or a target group.
• The EdgeRouter class now generates a proper routing from a group node border to a port location inside this group node defined by a strong PortConstraint or a fixed PortCandidate. Previously, the route was only calculated to the border and then the last segment was extended without consideration of obstacles and other elements.
• The performance of the GenericLabeling algorithm and the quality of the label placements were improved.
• The quality of edge label placement of the GenericLabeling class was improved in case that there are multiple labels with a source or target preference near the same node. They may now be placed further away but avoid undesired overlaps.
• The PortCalculator class now considers edge label positions such that they are not affected by whether this stage is applied or not. Previously, label positions could be changed if the label position was stored relative to the first/last segment or the port.
• If the master edge is clipped on the bounds of its source or target, the ParallelEdgeRouter class now always clips the associated parallel edges on that bounds, too.
• The RemoveCollinearBendsStage.Scale property now also allows zero and negative numbers as its value. This makes it possible to internally round coordinates to full integer values for the comparison of bend points and, thus, the stage can be made more fuzzy.
• The TreeReductionStage now marks non-tree edges if an IDataAcceptor is registered with the input graph with key TreeReductionStage#NonTreeEdgeSelectionKey. This way a user is able to query which edges the algorithm determined to be the non-tree edges.
• New options on class PlaceNodesAtBarycenterStage allow for specifying the size of affected nodes, considering the grouping structure when calculating the barycenter of nodes as well as removing the bends of edges incident to affected nodes.
• The properties Rows and Columns of class PartitionGrid are now of type IEnumerable<RowDescriptor> and IEnumerable<ColumnDescriptor> instead of an un-typed YList.
• The PartitionGridData class has new properties RowOrderOptimizationEnabled and ColumnOrderOptimizationEnabled to indicate whether or not the order of the rows respectively columns should be chosen automatically to minimize edge lengths.
• The new ChannelRoutingTool class brings back the features of the ChannelRouter class that was removed in version 3.0.
• Combining multiple LayoutData classes is now easier:
  • The base class LayoutData offers a new method combineWith that combines the current instance with another LayoutData instance.
  • The class CompositeLayoutData has an additional constructor that takes a variable number of LayoutData instances.
• The new properties AbortHandler, SourcePortConstraints, TargetPortConstraints, SourcePortCandidates, and TargetPortCandidates of ChannelEdgeRouterData facilitate using these features with ChannelEdgeRouter.
• The RowIndices and ColumnIndices properties of the PartitionGridData class can now also be used in combination with the Grid property.
• The ImprovingPortAssignment boolean property of LayoutExecutor and LayoutGraphAdapter was replaced by the PortAdjustmentPolicy property that offers more options how port locations should be adjusted after a layout calculation.

Viewer

• The parameter of the scroll command, that can be used to specify an additional scroll factor, can now be any numeric value of type Number.
• CanvasComponent: Added zoomToAnimated overloads which take an optional event listener that is notified of the animation's end.
• IMapperRegistry#createDelegateMapper has been renamed to createFunctionMapper.
• The property ItemMapping#Delegate has been renamed to Function.
• The property ContextItemMapping#ContextDelegate has been renamed to ContextBiFunction.
• The property ItemCollection#Delegate has been renamed to Predicate.
• The default methods toList and toArray have been added to IEnumerable.
• Added convenience methods to convert view geometry classes (PointD, RectD, SizeD, InsetsD, OrientedRectangle) to layout classes (YPoint, YRectangle, YDimension, YInsets, YOrientedRectangle) and vice versa.
• Added convenience methods for easy conversion between yFiles geometry classes and Java geometry classes:
  • IPoint#toPoint2D and PointD#fromPoint2D.
  • IRectangle#toRectangle2D and RectD#fromRectangle2D.
• HandleInputMode now clears the AffectedItems after the Canceled event has been raised instead of before.
• DefaultEdgePathCropper's methods cropEdgePath and cropEdgePathAtArrow are no longer final.
• The viewport animation of the LayoutExecutor class considers now the value of the LimitingFitContentZoomEnabled property of the corresponding GraphComponent.
• NodeStylePortStyleAdapter and AbstractJComponentPortStyle now have an Offset property that allows to shift the port visualization so that it no longer is centered over the port.
• The GraphModelManager class has new factory methods for creating the ItemModelManager of each item group.
• The GraphModelManager#getModelItem method now always returns the IModelItem for an ICanvasObject retrieved for it via getMainCanvasObject. Previously this only worked in all cases for the ICanvasObject retrieved via getCanvasObject.
• Mouse move and drag events now correctly report the changed modifier keys.
• Reduced number of cases where a new label was created by interactive editing instead of editing an existing one.
• The methods addLabel, createLabel and editLabel of GraphEditorInputMode and TableEditorInputMode that are used to start the respective interactive label editing gesture programmatically return now a Future with the edited or newly created label as result.
• GraphEditorInputMode provides new protected methods createLabelCore and editLabelCore to allow for overriding the default implementations.
• GraphEditorInputMode provides a TextEditorInputModeConfigurator to allow for configuring the TextEditorInputMode before each label editing.
• The GraphEditorInputMode#DeletedItem event provides now context information about the state before the item has been deleted. For example, if a label has been deleted you now can get its old owner.
• The method GraphEditorInputMode#onDeletedItem is no longer final.
• Added the GraphClipboard#getId method to facilitate retrieving the original item from which an item to be pasted has been copied from.
• The new property GraphClipboard#ClipboardContext provides access to the current IGraphClipboardContext during a clipboard operation.
• The new property CreateEdgeInputMode#ShowingTargetHighlightEnabled specifies whether to enable or disable highlighting of potential targets for edge creation. Also, the method updateTargetHighlight has been added to allow for further customization of the highlight.
• NavigationInputMode: Added a property ScrollingToSelectionEnabled that controls whether a node that is focused or selected with a keyboard gesture is automatically scrolled into the viewport if necessary.
• The new properties PortRelocationHandle#ShowingTargetHighlightEnabled and PortRelocationHandleProvider#ShowingTargetHighlightEnabled specify whether to enable or disable highlighting of potential targets for edge creation. Also, the method updateHighlight has been added to the PortRelocationHandle class to allow for further customization of the highlight.
• The new properties PortRelocationHandle#ShowingPortCandidatesEnabled and PortRelocationHandleProvider#ShowingPortCandidatesEnabled specify whether to enable or disable showing port candidates during edge relocation.
• The new PortStyleDecorationInstaller class allows the use of an IPortStyle to render the selection, highlight, or focus indicator of ports.
• The properties RectangleIndicatorInstaller#Template and OrientedRectangleIndicatorInstaller#Template now return always the value that has been set by client code and are not modified by internal code anymore.
• Snaplines are now infinitely long by default.
• The performance of EdgePathLabelModel#getGeometry and EdgeSegmentLabelModel#getGeometry has been strongly increased.
• The GraphMLIOHandler class now supports reading and writing arbitrary objects at graph level.
• GraphML deserialization now supports the symbolic names "Zero" and "Infinite" for reading SizeD values.
• GraphML deserialization now supports the symbolic name "Infinite" for reading RectD values.
• GraphML deserialization now supports the symbolic name "Origin" for reading PointD values.
• The type of property GraphBuilder#EdgeLabelProvider was generalized from Function<TEdge,String> to Function<TEdge,Object>.

Bugfixes

Algorithms

• The Paths#findAllChains method now correctly calculates the chains of input graphs with cycles.
• The GraphChecker#isMultipleEdgeFree method now returns the correct result for input graphs with self-loops.
• The Bfs#getLayers method now correctly stores the layer indices in the specified INodeMap. Previously, the maximum layer index stored in the map exceeded the number of returned layers.

Layout

• The EdgeRouter class no longer produces bad, non-orthogonal edge segments in cases where a selected edge is grouped together with an un-selected edge and where both edges have strong PortConstraints at their common source/target node.
• The PortPlacementStage class no longer destroys the grouping information for the core layout algorithm.
• The EdgeRouter class now correctly considers strong port constraints of edges that belong to a bus structure.
• The HierarchicLayout class no longer throws an exception if the component arrangement policy is set to ComponentArrangementPolicy#COMPACT and bus routing is enabled (see property HierarchicLayoutData#Buses).
• The OrganicLayout class now correctly considers input graphs where substructure handling is enabled and all nodes are located at coordinate (0,0). Previously, such inputs may have triggered an ArgumentException.
• Class EdgeRouter no longer throws an exception if all fixed edges of a bus are non orthogonal/octilinear.
• The GenericLabeling class no longer throws an ArgumentException for some input graphs containing labeled edges with zero length.
• The HierarchicLayout class no longer throws an exception if it is wrapped by an instance of RecursiveGroupLayout and the input graph contains layering constraints between elements of different groups.
• The HierarchicLayout class now correctly considers the group insets for input graphs with nested group nodes. Previously, it sometimes produced too large insets for inner groups.
• The HierarchicLayout class no longer throws an IllegalArgumentException for some rare cases in incremental layout mode.
• The HierarchicLayout class now produces shorter, more direct edge routes for edges connecting at a group node and leaving on the the left/right group side. This only affects cases where the relevant group node also contains direct-content edges (see EdgeLayoutDescriptor#DirectGroupContentEdgeRoutingEnabled).
• Self-loop segments generated by the HierarchicLayout class are now shorter and take up less space if possible. Previously, segments were sometimes unnecessarily long even though the minimum length settings allowed shorter segments.
• The HierarchicLayout class now produces less superfluous crossings if there are same-layer edges with PortConstraints or PortCandidates.
• The HierarchicLayout class now correctly handles port labels with zero height/width. Previously, such labels may have caused very large distances between some nodes.
• The HierarchicLayout class sometimes threw an IllegalArgumentException for input graphs that contained incremental elements in combination with groups.
• The HierarchicLayout class sometimes threw an IllegalArgumentException for input graphs that contained fixed elements in combination with both swimlanes and groups.
• The HierarchicLayout class now places sloped segments of grouped octilinear edges such that they are perfectly overlapping each other. Previously, it could happen that segments were slightly displaced with respect to each other.
• The HierarchicLayout class no longer causes non-orthogonal segments when the input contained port labels in conjunction with edge grouping.
• The HierarchicLayout class now correctly considers fixed nodes with layering constraints. In previous versions there were some rare cases where such inputs caused infinite looping issues.
• The HierarchicLayout class no longer produces intersections between edges and elements of a sub-component (see HierarchicLayoutData#SubComponents). Note that this fix may sometimes cause less compact results within a layer.
• Improved the path search performance of the EdgeRouter class for cases where a large number of fixed and overlapping edge segments exist. Previously, the search could become very slow in such scenarios.
• The EdgeRouter class now correctly groups edges associated with equal group IDs that have a different object ID.
• The EdgeRouter class now avoids unnecessary bends in cases that contain PortCandidates with fixed offsets (or strong PortConstraints) where the fixed port locations have a very similar x- or y-coordinate such that the path must consist of three segments with a single, very short middle segment. Previously, five segments in total were generated.
• A rare exception that was triggered by the EdgeRouter class during routing when a Grid is defined on which edges need to be routed is now fixed.
• The EdgeRouter class now correctly handles edges with external ports. Previously, such inputs may have caused an exception.
• The EdgeRouter class now correctly routes direct content edges with strong port constraints at the group nodes. Previously, the algorithm sometimes produced weird routes for such edges.
• Fixed a bug in the EdgeRouter class that sometimes caused a non-deterministic behavior.
• Fixed two issues in the EdgeRouter class that resulted in the violation of a PortCandidate with fixed offsets or a strong PortConstraint. The first was only triggered for constraints at the target side and only when the target node was additionally partly or fully covered by other obstacles (e.g. node labels). The second issue appeared in cases with the source and target node fully overlapping (e.g. an edge from a group to a child node).
• The EdgeRouter class no longer throws an exception if its PolylineRoutingEnabled property is enabled and the input contains fixed, grouped edges.
• The EdgeRouter class now considers the correct NodeHalo associated with the target node when handling the minimum last segment length setting. Previously it incorrectly considered the halo of the source node which could lead to unnecessarily long or too short last segments.
• The EdgeRouter class now correctly considers intersections between edges and labels of fixed edges if property EdgeLabelConsiderationEnabled is enabled.
• The EdgeRouter class no longer throws an exception during routing in cases where the source or target node is covered by obstacles (i.e. by other nodes or labels).
• The EdgeRouter class now correctly considers intermediate routing points when using the polyline routing style (EdgeRouter#PolylineRoutingEnabled). Previously, it could happen that intermediate points were not part of the final polyline edge path.
• The EdgeRouter class no longer throws an exception during the routing of some graphs with grouped edges.
• The EdgeRouter class no longer considers all PortCandidates with multiple directions as fixed PortCandidates.
• The EdgeRouter class now correctly handles cases where the maximum duration is exceeded and where previously an exception was triggered.
• Fixed a StackOverflowError in EdgeRouter.
• The OrganicLayout class no longer throws an exception when using CycleSubstructureStyle#CIRCULAR and arranging a cycle structure where at least one cycle node is also connected to a group node outside the cycle.
• The OrganicLayout class now produces deterministic results for group nodes if its property DeterministicModeEnabled is enabled.
• The OrthogonalLayout class no longer causes an exception for some input graphs when property FaceMaximizationEnabled is enabled.
• The OrthogonalLayout class no longer runs into an infinite loop for some input graphs that are tree structures with mixed edge directedness (see property OrthogonalLayout#EdgeDirectednessDpKey). Note that the problem only occurred if property OrthogonalLayout#TreeStyle is not set to TreeLayoutStyle#NONE.
• The OrthogonalLayout class no longer throws an exception when its property UniformPortAssignmentEnabled is enabled and the input contains parallel edges.
• When using RecursiveGroupLayout, the values of the properties ComputedWidth, ComputedHeight and ComputedPosition of the classes ColumnDescriptor and RowDescriptor are now correctly set after the layout if EdgeRouter is the corresponding InterEdgeRouter.
• The CompactNodePlacer class no longer throws an exception for input graphs with specified memento strategies (see TreeLayoutData#CompactNodePlacerStrategyMementos or CompactNodePlacer#STRATEGY_MEMENTO_DPKEY).
• The CompactNodePlacer class now correctly considers the specified values of the VerticalDistance and HorizontalDistance properties.
• The CompactNodePlacer class no longer throws an exception for some inputs with specified strategy memento information (either via property TreeLayoutData#CompactNodePlacerStrategyMementos or with a mapper registered with key CompactNodePlacer#STRATEGY_MEMENTO_DPKEY).
• The SimpleNodePlacer class no longer produces very long horizontal edge segments for inputs where it isn't required.
• The GenericLabeling class now correctly places labels of direct content edges (edges that directly connect a group node with a descendant, without leaving the group) with a free edge label model.
• The GenericLabeling class no longer calculates wrong label profit values (AbstractLabeling#getProfit) for some edge labels. Previously, edges that had a PreferredPlacementDescriptor were sometimes affected.
• The GenericLabeling class now produces valid results for edge labels that have a preferred distance to the edge (PreferredPlacementDescriptor#DistanceToEdge) and at the same time multiple SideOfEdge preferences (e.g. left of edge and on the edge). Previously, the algorithm sometimes violated the preferred distance even though it would have been possible to keep it.
• The GenericLabeling class now always prefers LabelCandidates with higher profit values over others with lower profit (see AbstractLabeling#getProfit). Previously, this sometimes happened even though both candidates did not intersect with other elements.
• The GenericLabeling class does no longer assume that all LabelCandidates associated to a label have the same size. Previously, this caused unexpected labeling results if custom candidates with different sizes were given.
• Fixed a rare bug in the GenericLabeling that may have caused an IllegalArgumentException for some input graphs that contain edges with zero length segments and labels associated with a free edge label model.
• The SeriesParallelLayout class now correctly handles input graphs with groups that only contain disconnected nodes. Previously, such inputs caused an exception.
• The PartialLayout class now correctly considers the specified PortCandidates during orthogonal or octilinear routing of edges.
• The PartialLayout class does no longer reduce the size of fixed group nodes if the option PartialLayout#ResizeFixedGroups is disabled.
• The ComponentLayout class now correctly handles input graphs with user-specified components that contain nodes with null as their component ID (see property ComponentLayoutData#ComponentIds). Previously, such inputs may have caused an exception.
• The PolylineLayoutStage does no longer generate overlaps between sloped, polyline segments created by the stage and unrelated other obstacles (e.g. nodes).
• The OrganicRemoveOverlapsStage no longer produces infinite loops in some rare cases.
• Fixed a bug in YGraphAdapter that could trigger a NullPointerException when boolean, integer or double values were requested from registered IMapper but no value had been set beforehand.

Viewer

• Fixed a bug in GraphEditorInputMode where changing the value of ShowHandleItems while handles were already displayed resulted in duplicate handles.
• Fixed a bug in EdgePathLabelModel which could return an invalid geometry for parameters with a ratio < 0 and zero length edge segments.
• A bug in CanvasComponent#fitContent has been fixed that sometimes resulted in a short flickering.
• Mapper: Fixed default value handling for the null key.
• Mapper: Ensured that mappings for the null key are taking into account by method getEntries.
• Changed CommandBindingAction's actionPerformed behavior to always pass the action's target to the associated KeyboardInputMode#ExecuteCommandHandler and KeyboardInputMode#CanExecuteCommandHandler instances instead of the action event's source.
• GeneralPath#flatten(): Fixed unexpected behavior if a curve follows after a close operation.
• Zooming the viewport during interaction no longer synthesizes mouse-move events in the wrong locations.
• Labels at folder nodes and their adjacent edges are no longer lost during GraphML deserialization if the DefaultFolderNodeConverter#CopyFirstLabel property is enabled.
• Fixed a bug in PortRelocationHandleProvider where the settings ShowPortCandidates and ShowTargetHighlight were ignored.
• Fixed a bug in CreateEdgeInputMode#getPortOwner which could return edges even if EdgeToEdgeConnectionsAllowed was set to false. This could result in the edge's IPortCandidateProvider being queried for candidates erroneously.
• Fixed a bug in the graph implementation that sometimes lead to a runtime that was quadratic in the number of nodes when creating large graphs.
• Reparenting an expanded group node into a collapsed group node no longer throws an exception.
• Fixed an exception which could occur in CanvasComponent's method compareRenderOrder and when using GraphModelManager's Comparator property.
• GraphClipboard's methods onElementCut and onElementCopied are no longer called for graph items which are not copied themselves but are owners of copied items.
• When an edge is duplicated using GraphClipboard and a port is newly created during this operation, the new port now gets the old port's style and tag.
• Fixed a memory leak in the UndoEngine class if the tokens returned by getToken were not disposed when the UndoEngine got cleared.
• The CreateEdgeInputMode class now considers the value of the CanvasComponent#HitTestRadius property when its StartingOverCandidateOnlyEnabled property is enabled.
• The visualization of source port candidates by the CreateEdgeInputMode class does not flicker, anymore.
• With SmartEdgeLabelModel, it was impossible to move a label from the left side of an edge to the right side. Instead, the label stopped at the edge.
• The null check for the GridVisualCreator#Pen property works correctly now.
• The type IGridConstraintProvider cannot be used in lookup methods since it has a generic type parameter. Therefore, new specific interfaces have been added for each item type (for example INodeGridConstraintProvider).
• The EdgeStyleDecorationInstaller class no longer causes an exception when used on edges that are attached to other edges.
• Parsing a GraphML file with a folding edge state with a label without a preferred size no longer throws an exception.
• In rare cases, saving a graph with folding to GraphML threw an exception.

Incompatible Changes

Layout

• The ImprovingPortAssignment boolean property of LayoutExecutor and LayoutGraphAdapter has been replaced by the PortAdjustmentPolicy property.
• SingleItemCollection's Item property has been pulled up to ItemCollection. Class SingleItemCollection has been removed, its usages have been replaced by ItemCollection.
• The property HierarchicLayoutData#AlternativeEdgePath has been renamed to HierarchicLayoutData#AlternativeEdgePaths.
• The property HierarchicLayoutData#AlternativeEdgePaths now expects Iterable<IPoint> instead of YPointPath as mapped values.
• The property HierarchicLayoutData#AlternativeGroupBounds now expects IRectangle instead of YRectangle as mapped values.
• The type of the properties BalloonLayoutData#TreeRoot and TreeLayoutData#TreeRoot has been changed to SingleItem<INode>.
• The property TreeLayoutData#LeftRightPlacersLeftNodes has been renamed to TreeLayoutData#LeftRightNodePlacerLeftNodes.
• The property TreeLayoutData#DelegatingNodePlacersPrimaryNodes has been renamed to TreeLayoutData#DelegatingNodePlacerPrimaryNodes.
• The properties SourceGroups and TargetGroups of RadialLayoutData have been removed since edge grouping is not supported by the RadialLayout class.
• The properties Rows and Columns of class PartitionGrid are now of type IEnumerable<RowDescriptor> and IEnumerable<ColumnDescriptor> instead of an un-typed YList.
• The PenaltySettings#InvalidEdgeGroupingPenalty property has been removed. If edge groups are defined, the EdgeRouter class now always considers them. Therefore, this setting no longer applies.
• The following changes regarding the expert API related to the EdgeRouter class were made:
  • The first parameter of the constructors in class AbstractSegmentInfo is now of type Object instead of Edge. The provided type should be either PathRequest for affected edges or Edge for non-affected, fixed ones. Furthermore, the property AbstractSegmentInfo#Edge has been removed as the info is not necessarily associated with an edge anymore.
  • Simialrly, the first parameter of the constructor in class EdgeCellInfo is now of type Object instead of Edge. The provided type should be either PathRequest for affected edges or Edge for non-affected, fixed ones.
  • The constructor of class EdgeInfo now additionally takes a parameter of type Edge.
  • The parameter of type Edge from the constructor of Path as well as the respective property were removed. A path is now not necessarily associated with an edge but only with the newly introduced PathRequest.
  • The method PathSearchResult#getEdgeInfo(Path) was removed.

Viewer

• The property CanvasComponent#Editable and the associated event editableChanged are not necessary and have been removed.
• IMapperRegistry#createDelegateMapper has been renamed to createFunctionMapper.
• The property ItemMapping#Delegate has been renamed to Function.
• The property ContextItemMapping#ContextDelegate has been renamed to ContextBiFunction.
• The property ItemCollection#Delegate has been renamed to Predicate.
• Changed CommandBindingAction's actionPerformed behavior to always pass the action's target to the associated KeyboardInputMode#ExecuteCommandHandler and KeyboardInputMode#CanExecuteCommandHandler instances instead of the action event's source.
• GraphClipboard's methods onElementCut and onElementCopied are no longer called for graph items which are not copied themselves but are owners of copied items. As a consequence, the methods cut and copy of the IClipboardHelper implementations of these elements are no longer called, either.
• The classes GeneralPath and GeneralPath.PathCursor are now final.

Changes of Default Behavior

Layout

• Renamed property PartialLayout#ResizeFixedGroups to FixedGroupResizingEnabled.
• The HierarchicLayout class now uses a higher crossing cost for group node borders. To specify custom values, use the property HierarchicLayoutData#GroupBorderCrossingCosts.
• The GroupingSupport class no longer throws an IllegalArgumentException if there is a node without associated ID (see GroupingKeys#NODE_ID_DPKEY). Instead the class uses the node itself as ID.
• The SimplexNodePlacer#BarycenterMode property is now enabled by default. Thus, the HierarchicLayout class with default settings now produces different (usually more symmetric) layouts.
• The default value of the property GridNodePlacer#RootAlignment was changed to GridNodePlacer#BUS_ALIGNED from AbstractRotatableNodePlacer#RootAlignment#TRAILING.
• If the master edge is clipped on the bounds of its source or target, the ParallelEdgeRouter class now always clips the associated parallel edges on that bounds, too.

Viewer

• The following places now throw a ConcurrentModificationException instead of an IllegalStateException:
  • FilteredGraphWrapper: Changing graph items while iterating those using the IListEnumerable returned by FilteredGraphWrapper#getNodes, FilteredGraphWrapper#getEdges, FilteredGraphWrapper#getLabels or FilteredGraphWrapper#getPorts.
  • FilteredGraphWrapper: Changing the edges at a port or node while iterating those edges using the IListEnumerable returned by edgesAt.
  • GeneralPath: Changing the path's structure while iterating the path using a PathCursor returned by GeneralPath#createCursor.
• The default tooltip in the class ToolTipQueryEventArgs is now set to null. Thus, the tooltip is not displayed when the event is handled without setting the tooltip content.
• The properties RectangleIndicatorInstaller#Template and OrientedRectangleIndicatorInstaller#Template now return always the value that has been set by client code and are not modified by internal code anymore.

Bugfixes

Viewer

• With SmartEdgeLabelModel, it was impossible to move a label from the left side of an edge to the right side. Instead, the label stopped at the edge.
• Fixed an exception which could occur in CanvasComponent's method #compareRenderOrder and when using GraphModelManager's #Comparator property.
• Parsing a GraphML file with a folding edge state with a label without a preferred size no longer throws an exception.
• In rare cases, saving a graph with folding to GraphML threw an exception.
• The NodeAlignmentPolicy values CENTER_LEFT, CENTER_RIGHT, TOP_CENTER, BOTTOM_CENTER, and BOTTOM_LEFT now work correctly.
• Reparenting an expanded group node into a collapsed group node no longer throws an exception.
• DefaultLabelStyle: Fixed insets calculation.

Layout

• Fixed a potential exception in LayoutExecutor which could occur when a layout is applied to a graph which contains table nodes which are not group nodes.

New Demos

• Added RotatableNodesDemo that shows how support for rotated node visualizations can be implemented on top of the yFiles library.
• Added PartitionGridDemo that shows how a PartitionGrid can be used in layout calculations to restrict the node positions to grid cells.
• Added RenderingOrderDemo that shows the effect of different render policies on the z-order of nodes, edges, labels and ports.
• Added EdgeToEdgeDemo that demonstrates the use of edge-to-edge connections.

Improvements

Layout

• Slightly improved the performance of the GenericLabeling algorithm and improved the quality of the label placements for some cases.

Bugfixes

View

• Fixed null check for GridVisualCreator#Pen property.
• Fixed an issue where EdgeStyleDecorationInstaller would cause an exception when used on edges that connect to other edges.
• Fixed a bug, which might occur in very rare cases in the undo/redo processing of several consecutive reparent actions.
• Fixed a bug in the graph implementation that sometimes led to a runtime that was quadratic in the number of nodes when creating large graphs.
• CreateEdgeInputMode: Fixed a bug that caused the visualization of source port candidates to flicker.
• The EdgeStyleDecorationsInstaller class now properly displays decorations for edges between group nodes and their descendants when displayed in view coordinates.
• CollapsibleNodeStyleDecorator: Although the wrapped style has its own IClickListener defined in its lookup, it was not always used by the CollapsibleNodeStyleDecorator.
• Fixed a bug in the UndoEngine that could lead to memory leaks if the tokens returned by getToken were not disposed of when the UndoEngine got cleared.
• Fixed a bug that rendered labels or ports neither in a separate layer nor at their owner when exactly one of LabelLayerPolicy#AT_OWNER or PortLayerPolicy#AT_OWNER was used.
• Fixed a bug in GridVisualCreator that rendered the grid at the wrong location when the viewport contained negative coordinates.
• CollapsibleNodeStyleDecorator: IsHit respects buttons outside the node bounds.

Algorithms

• Method Paths#findAllChains now correctly calculates the chains of input graphs with cycles.

Layout

• Fixed a bug in class EdgeRouter that sometimes caused a non-deterministic behavior.
• The PolylineLayoutStage does no longer generate overlaps between sloped, polyline segments created by the stage and unrelated other obstacles (e.g. nodes).
• Fixed a rare exception that was triggered by the EdgeRouter class during routing in cases where the input contained grouped edges.
• The GenericLabeling class now produces better results for edge labels that have a preferred distance to the edge (PreferredPlacementDescriptor#DistanceToEdge) and at the same time multiple SideOfEdge preferences (e.g. left of edge and on the edge). Previously, the algorithm sometimes violated the preferred distance even though it would have been possible to keep it.
• Fixed two issues that induced the violation of a PortCandidate with fixed offsets (or a strong PortConstraint) by the EdgeRouter class. The first was only triggered for constraints at the target side and only when the target node was additionally partly or fully covered by other obstacles (e.g. node labels). The second issue appeared in cases with the source and target node fully overlapping (e.g. an edge from a group to a child node).
• The EdgeRouter class no longer throws an exception for inputs (rare) containing fixed, grouped edges and when EdgeRouter#PolylineRoutingEnabled is enabled.
• The EdgeRouter now considers the correct NodeHalo associated with the target node when handling the minimum last segment length setting. Previously it incorrectly considered the halo of the source node which could lead to unnecessarily long or too short last segments.
• Class EdgeRouter now correctly considers intersections between edges and labels of fixed edges if property EdgeLabelConsiderationEnabled is enabled.
• Fixed a very rare exception that was triggered by the EdgeRouter class during routing in cases where the source/target node is covered by obstacles (i.e. other nodes, labels).
• The EdgeRouter class now correctly considers intermediate routing points when using the polyline routing style (EdgeRouter#PolylineRoutingEnabled). Previously, it could happen that intermediate points were not part of the final polyline edge path.
• Class PartialLayout now correctly considers the specified PortCandidates during the orthogonal/octilinear routing of edges.
• Class EdgeRouter no longer considers all PortCandidates with multiple directions as fixed PortCandidates.
• The OrthogonalLayout class no longer throws an exception when property OrthogonalLayout#UniformPortAssignmentEnabled is enabled and the input contains parallel edges.
• The CompactNodePlacer class now correctly considers the specified values of the VerticalDistance and HorizontalDistance properties.
• Class OrganicRemoveOverlapsStage no longer produces infinite loops for some rare cases.
• The CompactNodePlacer class no longer throws an exception for some inputs with specified strategy memento information (either via property TreeLayoutData#CompactNodePlacerStrategyMementos or with a mapper registered with key CompactNodePlacer#STRATEGY_MEMENTO_DPKEY).
• Self-loop segments generated by the HierarchicLayout class are now shorter and take up less space if possible. Previously, segments were sometimes unnecessarily long even though the minimum length settings allowed shorter segments.
• When using RecursiveGroupLayout, the values of the properties ComputedWidth, ComputedHeight and ComputedPosition of the classes ColumnDescriptor and RowDescriptor are now correctly set after the layout if EdgeRouter is the corresponding InterEdgeRouter.
• The HierarchicLayout class now produces less superfluous crossings if there are same-layer edges with PortConstraints or PortCandidates.
• Improved the path search performance of the EdgeRouter class for cases where a large number of fixed and overlapping edge segments exist. Previously, the search could become very slow in such scenarios.
• The HierarchicLayout class now correctly handles port labels with zero height/width. Previously, such labels may have caused very large distances between some nodes.
• The HierarchicLayout class sometimes threw an ArgumentException for input graphs that contained incremental elements in combination with groups.
• The HierarchicLayout class now prevents intersections between labels and the horizontal grid lines of a PartitionGrid.
• The EdgeRouter class no longer throws an exception for some inputs containing edges with intermediate routing points.
• The HierarchicLayout class now places sloped segments of grouped octilinear edges such that they are perfectly overlapping each other. Previously, it could happen that segments were slightly displaced with respect to each other.
• Class SeriesParallelLayout now correctly handles input graphs with groups that only contain disconnected nodes. Previously, such inputs caused an exception.
• Fixed a bug in the HierarchicLayout that could cause non-orthogonal segments when the input contained port labels in conjunction with edge grouping.
• The OrganicLayout class now produces deterministic results for group nodes (if property DeterministicModeEnabled is enabled).
• Fixed a StackOverflowError in EdgeRouter.

Improvements

Styles

• PolylineEdgeStyle and ArcEdgeStyle now consider property changes of their source and target arrows. Previously the source or target arrow properties had to be changed to instantly see the effect.

Layout

• OrganicLayoutData: The new properties SourceGroupIds and TargetGroupIds can be used to group edges when some preconditions are met.

Bugfixes

Viewer

• Scrolling with CanvasComponent#ScrollCommandAnimationEnabled enabled no longer changes the zoom level.
• Fixed a bug in RectangleIndicatorInstaller, OrientedRectangleIndicatorInstaller, HandleInputMode and in SnapResultProvider and SnapResult implementations, that has caused a NullPointerException when the corresponding template is null.
• DefaultLabelStyleRenderer: Fixed vanishing text when using a shared renderer instance between labels with non-empty text and label with empty text.

Input

• PortDropInputMode: The labels of dragged ports were not displayed correctly.

Graph Model

• Fixed an exception which might occur upon user interactions in a folded graph which contains labels at ports.
• Fixed a bug which might have caused an edge in a folded view to lose its bends and labels after repeatedly reversing the edge.

Layout

• HierarchicLayout: Fixed a problem that sometimes caused too long straight-line same-layer edges. Note that the additional length was equal to the value of HierarchicLayout#NodeToEdgeDistance
• HierarchicLayout: Fixed endless loop issue causing a StackOverflowError if a sub-component with a nested layout algorithm that again applied an instance of HierarchicLayout was defined.
• HierarchicLayout: Fixed possible NullPointerException for input graphs with source/target port labels (see LabelPlacements#AT_SOURCE_PORT and LabelPlacements.AT_TARGET_PORT) and with a subset of nodes associated with halos (see NodeHalo).
• HierarchicLayout: Fixed a bug that sometimes caused a wrong placement of source/target edge labels when integrated edge labeling was enabled and if there were either critical edges (see HierarchicLayout.CRITICAL_EDGE_DPKEY) or property SimplexNodePlacer.EdgeStraighteningEnabled was enabled.
• HierarchicLayout and SimplexNodePlacer: Fixed a very rare IllegalArgumentException that was caused by some input graphs that contain both swimlanes and groups as well as fixed elements.
• HierarchicLayout: Fixed bug that could cause the violation of fixed port candidates if there were critical edges (see HierarchicLayout.CRITICAL_EDGE_DPKEY) and edges connecting to group nodes.
• OrganicLayout: Fixed bug that caused that movable nodes kept their initial location if the scope is set to SUBSET or MAINLY_SUBSET and if there are output restrictions (see OrganicLayout#OutputRestriction).
• TreeLayout: Fixed bug that caused less compact results when using the CompactNodePlacer.
• TreeLayout: Fixed bug that caused that the layout algorithm sometimes did not pass on exceptions that occurred during the layout calculation but caught them without proper handling.
• CompactNodePlacer: Fixed NullPointerException that was triggered when the tree root was marked as assistant node, see AssistantNodePlacer#ASSISTANT_DPKEY.
• CompactNodePlacer: Fixed IllegalStateException that could occur for input graphs that contain assistant nodes (see AssistantNodePlacer#ASSISTANT_DPKEY) and given placement strategies (see CompactNodePlacer#STRATEGY_MEMENTO_DPKEY).
• OrthogonalLayout: Fixed NullPointerException that occurred when the subtree layout style TreeLayoutStyle#INTEGRATED was specified, the subtree orientation was fixed and the graph was almost a tree graph with the exception that the root node contained additional self-loop edges.
• SeriesParallelLayout: Fixed a rare bug that triggered a NullPointerException when the input location of a node was set to a very large value (e.g. largest possible floating-point value). This applies if the algorithm is not in from-sketch mode. For the from-sketch mode, an exception can still occur - this case is considered to be bad input.
• RadialLayout: Fixed NullPointerException that was triggered when there was a DataProvider registered with the graph with key HierarchicalLayout.SUB_COMPONENT_ID_DPKEY.
• ComponentLayout: Fixed an IllegalArgumentException that was triggered for some input graphs with user-defined components (see COMPONENT_ID_DPKEY) where at least one node had null as its component id.
• RecursiveGroupLayout: Fixed a bug that caused violation of PortConstraints or PortCandidates for self-loops where both endpoints were restricted to the same node side.
• Polyline.EdgeRouter: Fixed a rare NullPointerException that was triggered for some input graphs when the maximum duration was exceeded.
• Polyline.EdgeRouter: Fixed bug that could cause unnecessary bends for edges that need to cross group node borders.
• Polyline.EdgeRouter: Fixed an issue that caused edge-to-edge distance violations (for segments directly connecting at a node) even if a cheaper route that e.g., introduces a bend - which costs less by default - was available.
• PolylineLayoutStage: Fixed a bug that caused collinear bends to be removed from fixed edges. Now, such fixed edges are not changed anymore.
• GenericLabeling: Fixed a very rare IllegalArgumentException that was caused by some input graphs that contain edges with zero length segments and labels associated with a free edge label model (i.e., SmartEdgeLabelModel or FreeEdgeLabelModel).

Major New Features

• The new LabelDropInputMode and PortDropInputMode classes implement drag and drop for labels and ports, respectively. The API of these classes is similar to NodeDropInputMode for nodes.
• Labels can now be added to ports and the new label models FreePortLabelModel and InsideOutsideLabelModel can be used to place such labels. On the technical side, IPort now extends the ILabelOwner interface and the enum constant GraphItemTypes#PORT_LABEL was added.
• The new LassoSelectionInputMode selects all model items inside a hand-drawn lasso region. This mode allows combinations of free-hand and straight-line sections during path creation. The following types and methods were added to support this mode.
  • Added the GraphEditorInputMode#LassoSelectionInputMode and GraphViewerInputMode#LassoSelectionInputMode properties and a corresponding factory method. LassoSelectionInputMode is disabled per default.
  • The new GraphEditorInputMode#lassoSelect and GraphViewerInputMode#lassoSelect methods programmatically selects all items in the provided GeneralPath.
  • The new ILassoTestable interface specifies whether the item is considered to be inside the lasso path. This is analog to the IMarqueeTestable interface for marquee selection.
  • Any model item can be decorated with an instance of ILassoTestable or provide one in its lookup. For this, the Node/Edge/Port/Label/BendDecorator classes got the new LassoTestableDecorator property for decorating an item with a custom ILassoTestable.
  • The new #isInPath method of AbstractNode/Edge/Port/ LabelStyle can be overridden to customize the lasso testing behavior.
• Labels and ports can now optionally be rendered directly in front of their owner. Such a rendering order can make the ownership of labels and ports more clear if nodes overlap. Previously, all label and ports were rendered in front of all nodes. The new rendering order can be enabled by setting the new properties LabelLayerPolicy and PortLayerPolicy of GraphModelManager to LabelLayerPolicy#AT_OWNER and PortLayerPolicy#AT_OWNER.

New Features

• The new GraphBuilder, TreeBuilder, and AdjacentNodesGraphBuilder classes can be used to build a graph from custom data.
• The nesting options of GraphModelManager for the visualizations of nodes and edges have been improved and clearified.
  • The properties HierarchicNodeNestingEnabled and HierarchicEdgeNestingEnabled are superseded by the new HierarchicNestingPolicy property. This property has the enum type HierarchicNestingPolicy.
  • The new option HierarchicNestingPolicy#GROUP_NODES configures GraphModelManager to visualize all leaf nodes in one canvas object group while nesting all group nodes depending on their hierarchical depth.
• The mouse wheel behavior of the overview can now be switched between ZOOM, SCROLL, and NONE, and optionally, the action can be performed only when the control is focused. This can be configured with the new OverviewInputMode#MouseWheelBehavior property.
• TableEditorInputMode: Double clicking a stripe or stripe label now edits the label in the same way as for other graph items.
• RectD and InsetsD: Added methods to reduce the size of an RectD and InsetsD instance, respectively.
• The new static methods IPositionHandler#combine combine multiple position handler instances into a single instance.
• Added the events ElementsCopied, ElementsCut, and ElementsPasted to GraphEditorInputMode, and the event ElementsCopied to GraphViewerInputMode.
• The new static IAnimation#createSequentialAnimation method creates an animation that animates multiple animations in sequence.
• The rectangle of the marquee selection can now be customized with the new protected method MarqueeSelectionInputModes#calculateMarqueeRectangle.
• Added new decorator implementations for table items. You can access these new decorators via the new method ITable#getDecorator with the RowDecorator, ColumnDecorator and StripeLabelDecorator properties.
• If the new CanvasComponent#QuantizingInputCoordinatesEnabled property is enabled, world coordinates of mouse events are rounded to nicer values to avoid unnecessary precision. For example, you'll get the value 326.375 instead of 326.3758109495. The rounding is chosen based on the zoom level to ensure that there is almost no visual deviation. Lower zoom levels will result in coarser rounding, higher zoom levels will use exactly as much precision as necessary. By default, this option is enabled.

Layout

• OrthogonalLayout: Added support for parallel routing of parallel edges (multi-edges that share the same source and target node). They are routed as parallel as possible; if there are edge labels, the routes must differ somewhat. Previously, parallel edges were not handled explicitly and their routes were often very different, making the recognition of parallel structures difficult.
• OrthogonalLayout: Added new property MaximumDuration, which enables to control the preferred time limit of the layout algorithms.
• OrthogonalLayout: Added property UniformPortAssignmentEnabled that allows to obtain results with a more uniform port assignment.
• Added convenience layout stage TemporaryGroupNodesInsertionStage that automatically generates a (non-nested) grouping structure from a given mapping of nodes to a component Id. This temporary grouping is meant for use during the run of the core layout algorithm of the stage. It allows, for example, easy use of RecursiveGroupLayout without the need for a real grouping structure when the requirement is that different sub-graphs need to be arranged with different layout algorithms.
• Added the TemporaryGroupNodeInsertionData configuration class for the new TemporaryGroupNodeInsertionStage layout stage.
• TreeLayout: Added node placer CompactNodePlacer that produces more compact tree layouts. It uses a dynamic optimization approach that chooses a placement strategy of the children such that the overall result is compact with respect to a specified aspect ratio, see property CompactNodePlacer#PreferredAspectRatio.
• The new TreeLayoutData#CompactNodePlacerStrategyMementos property can be used to to maintain similar layout styles over subsequent runs of compact tree layout.
• Added the new layout algorithm TabularLayout that generates simple tabular arrangements of nodes. It allows for placing nodes in rows and columns, such that each table cell contains at most one node. Among its features is, for example, a from-sketch mode, the possibility to exactly map nodes to specific cells or different vertical and horizontal alignments.
• Added the TabularLayoutData configuration class for the new TabularLayout algorithm.
• OrthogonalLayout: Added support for special layout styles of various substructures that are automatically detected in the input graph. Supported substructures are trees, chains and cycles - see the according properties OrthogonalLayout#TreeStyle, OrthogonalLayout#ChainStyle and OrthogonalLayout#CycleStyle. In addition to the style, the new feature offers more settings, like, for example, the desired tree layout orientation (see OrthogonalLayout#TreeOrientation). The orthogonal layout style LayoutStyle#NORMAL_TREE has been removed as the new tree style feature allows more settings for the arrangement of tree-like graphs.
• Added the new layout algorithm TreeMapLayout that generates tree maps. Tree maps present hierarchical data using nested rectangles (nodes) where each rectangle (node) gets its size depending on a specific dimension of data associated to it.
• Added the TreeMapLayoutData configuration class for the new TreeMapLayout algorithm.
• Polyline.EdgeRouter now supports routing through user-specified intermediate points. All specified points will lie on the edge route in the given order. See new property EdgeLayoutDescriptor#IntermediateRoutingPoints.
• Polyline.EdgeRouter: Edges that connect group nodes with their descendants can now directly connect from the inside to the group node border. Previously, an edge needed to always leave the group node before connecting to it. The feature can be enabled/disabled individually for each edge using the new property EdgeLayoutDescriptor#DirectGroupContentEdgeRoutingEnabled.
• HierarchicLayout: Added feature that allows to define sub-components of the input graph such that each sub-component is arranged by a user-specified layout algorithm. This allows for hierarchical layouts where parts of the graph are arranged in a different fashion, e.g., to emphasize special sub-structures. The sub-components can be specified by a data provider registered with the input graph with key HierarchicLayout.SUB_COMPONENT_ID_DPKEY or with the new HierarchicLayoutData#SubComponents property .
• ShortestPaths: Added a-star (A*) algorithm for finding the shortest path between two nodes in a directed or undirected, arbitrary graph.

Improvements

Graph Model

• All methods that set a node layout or a bend location are now fail-fast if the provided layout or location contains a NaN value. Previously, this resulted not in an immediate error but broke subsequent code like an automatic layout or a content rectangle calculation.
• The performance of FilteredGraphWrapper has been improved. Now, it depends mainly on the size of the resulting filtered graph. This allows for loading very large graphs into memory and displaying only a subset of them using FilteredGraphWrapper.
• For ITable's default methods findRow, findColumn, findStripe and findStripes, overloads without the Predicate parameter have been added.
• DefaultGraph has new factory methods to customize undo unit creation.
• DefaultGraph now fills the undo engine and triggers events in a consistent manner for all graph element factory methods.
• Many label model createParameter methods now have overloads without those parameters that are not needed every time.
• InteriorStretchLabelModel: Added new parameters CENTER_HORIZONTAL and CENTER_VERTICAL for horizontal or vertical centered one-line labels.
• The factory method IMapper#fromMap has been added which returns an implementation of IMapper that delegates to a java.util.Map.

View

• The new method GraphModelManager#getMainCanvasObject returns the canvas object that should be used when changing the visibility or z-order of a model item.
• Assigning a new graph instance to GraphOverviewComponent now keeps configuration changes made to the overview's GraphVisualCreator instance.
• Selfloop edges are now properly displayed in the GraphOverviewComponent.
• Animations after a layout don't break anymore if the graph is modified concurrently.
• Added the new CanvasComponent#LimitingFitContentZoomEnabled property which controls whether the maximum zoom level for the CanvasComponent#fitContent method as well as the FitContent command is restricted to 1 or the value of the MaximumZoom property.
• Akin to the two CanvasComponent#zoomTo methods, there are now two CanvasComponent#zoomToAnimated methods that animate the viewport change.
• ICanvasObjectGroup#addChild: A default method without the ICanvasObjectDescriptor parameter was added as overload which uses the ICanvasObjectDescriptor#ALWAYS_DIRTY_INSTANCE.
• GraphModelManager now avoids unnecessary re-installation of items if they keep their ICanvasObjectGroup. By these re-installations the z-order of the item in its group was lost and a new visual was created.
• The factory method IAnimation#createLayoutAnimation has been added which delegates to LayoutUtilities#createLayoutAnimation as the method is easier to find in IAnimation.
• The factory methods IAnimation#createParallelAnimation now takes covariant Iterables, i.e. Iterable<T extends IAnimation> instead of Iterable<IAnimation>.
• Inertia scrolling of the viewport behaves now in a more natural way. The scrolling stops now after a fixed amount of time and we fixed several problems that caused erratic behavior.
• The stroke thickness is now considered for the calculation of the origin of the default arrow visualizations. Therefore, the visualizations no longer extend into the node bounds.

Input

• Don't run unneccessary hit tests when a mode is canceled.
• The INode parameter of the NavigationInputMode#enterGroup method is now optional. If it is null the whole graph will be revealed.
• The CanvasComponent#createInputModeContext method is now public instead of protected.
• ItemClickedEventArgs now extends ClickEventArgs and therefore provides additional information like the InputModeContext.
• The new overload of the CreateEdgeInputMode#doStartEdgeCreation method taking an initialTargetLocation parameter can be used to define the initial location that shall be used to find a target node.
• CreateEdgeInputMode now removes coinciding bends if orthogonal edge creation is enabled.
• CreateEdgeInputMode provides access to a dummy target node which is used during the interactive edge creation. This allows making the node visible during creation by setting a style and size.
• CreateEdgeInputMode now supports edges ending without a valid target port candidate. This allows for creating new target nodes together with newly created edges.
• The new property CreateEdgeInputMode#PrematureEndHitTestable allows for considering any location as valid target point for an edge.
• The new CreateEdgeInputMode#DragCursor property specifies the cursor that is used during edge creation when no bend may be created at the current location.
• CreateEdgeInputMode now supports showing port candidates at potential sources for edge creation, too.
• CreateEdgeInputMode now always creates dummy ports during a gesture, instead of temporarily reusing real ports if available. This makes it possible to change e.g. the dummy edge's source port's style during the gesture.
• The new CreateEdgeInputMode#StartingOverCandidateOnlyEnabled property can be used to restrict the start of an edge creation gesture to directly hovered port candidates.
• The new protected CreateEdgeInputMode#getSourcePortCandidates method makes determining source port candidates more flexible.
• GraphEditorInputMode and TableEditorInputMode: Method editLabel now also returns a Future, similar to addLabel and createLabel.
• ClickInputMode now dispatches the clicked events in the same order as GraphEditorInputMode and GraphViewerInputMode, i.e. the more specific events LeftClicked, RightClicked, LeftDoubleClicked and RightDoubleClicked are now dispatched before Clicked and DoubleClicked. Hence, Clicked and DoubleClicked will only be triggered if the event wasn't handled before.
• TableEditorInputMode now handles clicks similar to GraphEditorInputMode:
  • New ItemClicked, ItemLeftClicked, ItemRightClicked, ItemDoubleClicked, ItemLeftDoubleClicked, ItemRightDoubleClicked events are raised.
  • If an event is handled, its default behavior is prevented.
  • The new properties ClickableItems and ClickableRegions determine for which items and regions a click event will be raised.
• The properties MaximumSnapDistance, ShowingHitPortOwnerCandidatesOnlyEnabled and Visualization have been added to PortRelocationHandleProvider and are applied to each PortRelocationHandle created by this provider.
• The default value of DefaultPortCandidate#LocationParameter is now FreeNodePortLocationModel#NODE_CENTER_ANCHORED for nodes and BendAnchoredPortLocationModel#FIRST_BEND for edges instead of a parameter of an internal model.
• During interactive edge creation, the tip of a newly created edge now only snaps to valid target port candidates to create orthogonal end segments.
• Moving a node with the MoveInputMode for unselected nodes now moves the bends of adjacent self-loops, too.
• Added overridable methods to PortRelocationHandle to allow customization of the port candidates.
• The new TextEditorInputMode#TextAreaPlacementPolicy property provides finer control of what happens when the TextArea is (partially) outside of the viewport.
• The new TextEditorInputMode#TextAreaPadding property controls the padding between the TextArea and the border of the canvas.
• The CanvasComponent#Mouse2DClicked event now reports the position of the mouse down event as its location. Previously, this was the location of the up events which can be slightly different.
• The new PortRelocationHandle#Visualization property controls how the preview during edge reconnection is handled. A new option is to change the edge during the gesture, which improves fidelity of the preview in certain cases.
• MoveLabelInputMode: The visualization of a moved label has been improved. The new property Visualization allows easy switching between a symbolic preview, a preview or a live view.
• The following input modes now release the mutex before dispatching their final event:
  • CreateEdgeInputMode now releases the mutex before dispatching the EdgeCreated event.
  • MoveInputMode now releases the mutex before dispatching the DragFinished event.
  • ResizeStripeInputMode now releases the mutex before dispatching the DragFinished event.
• The new methods findNextItem and findNearestItem of NavigationInputMode can be used to configure the determination of the "next" item.
• The type parameter T of class ItemDropInputMode<T> is no longer restricted to IModelItem.
• Overloads of the methods GraphCopier#copy and GraphClipboard#duplicate without the IElementCopiedCallback parameter have been added.
• The new GraphEditorInputMode#MoveUnselectedInputMode property provides a child input mode for moving unselected items. It supersedes the previous #createMoveUnselectedInputMode method. This input mode is disabled by default.
• The static constants SELECTED_MOVABLES_POSITION_HANDLER and SELECTED_MOVABLES_HIT_TESTABLE have been added to GraphEditorInputMode. These are used as default PositionHandler and HitTestable properties of GraphEditorInputMode#MoveInputMode and can be reused for other input modes.

Layout

• HierarchicLayout: Reduced required memory for graphs with sequence constraints.
• Polyline.EdgeRouter: Improved routing quality for edges between group nodes and their descendants in the case that the routing is aborted via AbortHandler or when the maximum duration time limit is up. Previously, such edges might not have been handled in this case, whereas now they always get a simple but valid orthogonal route.
• HierarchicLayout: Improved handling of sequence and layering constraints between sub-components, see HierarchicLayout#SUB_COMPONENT_ID_DPKEY or HierarchicLayoutData#SubComponent. Previously, such constraints were ignored.
• OrthogonalLayout: Reduced the number of bends of directed edges.
• OrthogonalLayout: Reduced number of crossings for directed edges.
• BusRouter: Now automatically ignores non-orthogonal edges with fixed bus descriptor (see BusDescriptor#isFixed) or transforms them into orthogonal edges if they are octilinear. In previous versions, the layout algorithm simply throws an IllegalArgumentException in such cases.
• OrthogonalLayout: Improved compactness of the layout results.
• OrthogonalLayout: Improved result of the perceived bends optimization (see OrthogonalLayout#PerceivedBendsOptimizationEnabled).
• OrthogonalLayout: The postprocessing step now also applies special transformations that can reduce the overall edge length.
• MultiPageLayout: Improved runtime as well as layout quality if the input is a tree structure and the specified #CoreLayout is either an instance of class TreeLayout or ClassicTreeLayout. Furthermore, property MultiPageLayout#AdditionalParentCount allows for specifing the number of additional proxies that the algorithm tries to add to a subtree. The original nodes associated with these proxies lie on the path of the tree's root to the subtree placed on a page.
• MultiPageLayout: Added property #ProxyReferenceNodeCreationEnabled that allows for disabling the creation of proxy reference nodes as well as property #MultipleComponentsOnSinglePagePlacementEnabled that allows to prevent that elements of different connected components are placed on the same page.
• PortPlacementStage now additionally considers port grouping constraints. If two edges are port-grouped at a certain node, the stage assigns the same port location to the edges. For more information about port grouping, see PortConstraintKeys#SOURCE_PORT_GROUP_ID_DPKEY and PortConstraintKeys#TARGET_PORT_GROUP_ID_DPKEY.
• TreeComponentLayout: Added property UndirectedTreeConsiderationEnabled that allows for specifing whether or not undirected tree structures should be handled or not. Previously, only directed tree structures were considered.
• OrthogonalLayout: Reduced the length of straight-line edges which can lead to layouts that are significantly more compact.
• OrthogonalLayout: Improved optimization that reduces the number of perceived bends, see OrthogonalLayout#PerceivedBendsOptimizationEnabled.
• HierarchicLayout: Fixed problem that sometimes caused an unnecessarily large distance between adjacent layers.
• Added new stage PlaceNodesAtBarycenterStage that places a user-specified subset of nodes on the barycenter of their neighbors. During the core layout, these node are hidden.
• DefaultNodePlacer and SimpleNodePlacer now both support to specify a minimum distance between the edge segments that are routed orthogonally in the channel between the root node and the child nodes, see method DefaultNodePlacer#MinimumChannelSegmentDistance and SimpleNodePlacer#MinimumChannelSegmentDistance respectively.
• ClassicTreeLayout now allows for specifying a minimum vertical distance for the horizontal edge segments of the bus, see ClassicTreeLayout#MinimumBusSegmentDistance.
• Major performance improvement for Polyline.EdgeRouter and routing scenarios where it is unavoidable to cross obstacles (e.g. other nodes, labels) in order to reach the target, including cases where a crossing is necessary to guarantee that port candidates/constraints at the target side are satisfied.
• Polyline.EdgeRouter: Improved quality in maze routing scenarios. Previously, it could happen that edge-node overlaps occurred even though there exists a more complicated path that yields no overlaps.
• Several minor performance improvements for Polyline.EdgeRouter that affect the path search phase as well as the segment location assignment phase.
• The new TreeLayoutData#CriticalEdgePriorities property can be used to specify critical edges.
• The new LayoutExecutor#createLayoutGraphAdapter callback method makes it possible to configure the LayoutGraphAdapter that is used for the layout calculation.
• SmartEdgeLabelModel now is properly handled by labeling algorithms, resulting in better label placements.
• The new ImprovingPortAssignmentEnabled property of LayoutExecutor and LayoutGraphAdapter enables PortCalculator to improve the port assignment.
• The combination of PartitionGridData and TableLayoutConfigurator has been improved:
  • PartitionGridData now reuses the PartitionGrid created by the TableLayoutConfigurator.
  • Several methods have been added to TableLayoutConfigurator which provide access to the PartitionCellId assignment of the configurator as well as the mappings between IRow/IColumn and RowDescriptor/ColumnDescriptor.
• The new properties LayerConstraints and SequenceConstraints of HierarchicLayoutData can be used to configure layer and sequence constraints for the HierarchicLayout. These supersede the previous LayerConstraintFactory and SequenceConstraintFactory properties.
• The property ItemMapping#Map has been added that allows you to use a java.util.Map for the mapping from items to values.

Demos

• A new LargeGraphsDemo has been added that shows some strategies how to keep a smooth UI when large graphs shall be visualized.
• The new GraphBuilderDemo and InteractiveNodesGraphBuilderDemo have been added that demonstrate basic usage of yFiles' new GraphBuilder classes.
• A new CustomPortModelDemo has been added that shows how to create and use a custom IPortLocationModel.

Further improvements

• The PointD#toMutablePoint and RectD#toMutableRectangle methods now return a MutablePoint instead of IMutablePoint and a MutableRectangle instead of a IMutableRectangle, respectively.
• The new method GeneralPath#intersects(GeneralPath) determines whether the path intersects with another GeneralPath.
• The GeneralPath#createSmoothedPath method now has additional parameters to change how smoothing is applied. Those new options result in nicer smoothing when combined with large smoothing lengths and many different segment lengths in the path.
• When reading GraphML with the deserialization property IgnoreXamlDeserializationErrors enabled, invalid property content is now skipped instead of discarding the whole object with such content.
• Added a remove method to NodeDecorator, LabelDecorator, EdgeDecorator, PortDecorator, and BendDecorator for easy removal of decorations.
• PolylineEdgeStyle renders better looking paths for self loop edges whose ports are near the node border.
• The performance of the DefaultLabelStyle has been improved. Using another VisualCachingPolicy then VisualCachingPolicy#Never now also speeds up the DefaultLabelStyle.
• The class CanvasResourceBundle has been added which can be used to replace the default command binding key strokes and command names via ResourceBundles.
• The new class LicenseConfig has been added whose static INSTANCE can be optionally used to configure the license resolving:
  • If the content of the license file is set as LicenseString property, it is used directly instead of trying to load a license file.
  • Otherwise if the LicenseClassLoader property is set, this ClassLoader is used to load the license file.
• The PlatformClassloader introduced with JDK 9 is now recognized per default when writing GraphML. For JDK classes of JDK 9 that are no longer known to the bootstrap classloader but only to the platform classloader no explicit XamlNamespaceMapping has to be added to GraphMLIOHandler.

Bugfixes

Graph Model

• The SmartEdgeLabelModel#findBestParameter method returned a parameter that was centered on the edge even if the desired label layout overlapped only a little bit with an edge segment or was directly aside of one.
• The graph of an IFoldingView now raises the NodeCreated, EdgeCreated, PortAdded, LabelAdded, and BendAdded events after the created element is registered. This fixes a bug where the master item of the created item was not available in handlers for these events.
• Table: The methods setLabelText, remove, setLabelPreferredSize and setLabelLayoutParameter now throw an IllegalArgumentException instead of an InvalidStateException.
• DefaultGraph now calls the onRemovingEdge and onRemovingPort methods before their incident items are removed.
• When a stripe is removed, ITable#LabelRemoved events for the implicitly removed associated labels are now raised, too.
• The implementations of IStripeHitTestHelper and IBoundsProvider in the lookup of an IStripe could neither be decorated nor overridden by the context lookup provided by a stripe style.
• The INodeInsetsProvider implementations which can be retrieved from InteriorLabelModel and InteriorStretchLabelModel now correctly sum up the space required by overlapping labels.

View

• The methods getBounds and isVisible describing the RectangleIndicatorInstaller returned wrong values. This could impact the performance as e.g. some node selection highlights were updated although they were not in the view port and result in unnecessary large content rectangles.
• GraphModelManager: Fixed NullPointerException that occured when any of the Descriptor properties were set while the GraphModelManager instance was not yet associated to an IGraph.
• Bridges: For edges which cross each other with the same absolute slope now a bridge is added on exactly one of these edges, depending on the crossing policy (was: either on both edges or none of them).
• Reduced memory consumption of DefaultEdgePathCropper.
• Removing an item that is currently highlighted with a custom HighlightIndicatorManager, FocusIndicatorManager, or SelectionIndicatorManager no longer results in a NullPointerException.
• Selected stripe labels no longer remain selected after their owning stripe is deleted.
• Selected stripe labels no longer cause exceptions when hovering over them.
• The selection indicator for selected stripe labels is now shown correctly.
• The methods GraphClipboard#copy and GraphClipboard#cut don't copy items anymore which depend on items that are selected but not included in GraphClipboard#CopyItems.
• Undo units created by the execution of a layout algorithm are now correctly merged with undo units of the previously executed interactive gesture.
• Corrected weird scrolling behavior of the scroll bar when the viewport was outside the content rectangle.
• The commands COPY, CUT, and DUPLICATE are no longer enabled if there are no elements to cut, copy or duplicate.
• Fixed a bug that sometimes prevented dispatching the mouse up event.
• CanvasComponent#fitContent now takes into account that scroll bars that are currently visible may vanish.
• Mouse wheel scrolling and scroll commands no longer move the view to the top left corner if a the viewport is limited by a ViewportLimiter.
• Bridges did sometimes not appear on edges when they were scrolled into the viewport.

Input

• PortRelocationHandleProvider now can handle null as graph constructor parameter.
• PortRelocationHandle#GHOST_VISUALIZATION_PEN_KEY now is excluded from obfuscation.
• Fixed IHitTestable implementation of DefaultPortCandidateDescriptor which used incorrect coordinates.
• The ParentInputMode property of the InputModeEventArgs now is the input mode which has raised the event. Previously, some input modes erroneously set the ParentInputMode to the containing GraphEditorInputMode or GraphViewerInputMode.
• Switching the input mode in an event handler of the current input mode no longer throws an exception.
• ItemHoverInputMode updates the hovered item upon mouse drag events, too. This is the documented behavior. Previously, the hovered item was only updated on mouse move events.
• ItemHoverInputMode removes the hovered item upon cancel.
• GraphClipboard: The contents of a folder node was not copied if the folder was copied from within a group view, i.e. if the user entered a group node. In the worst case, this might have frozen the complete application.
• Fixed an exception when an edge or label is pasted without selected target while its original owner is not in the current view.
• ClickInputMode provided wrong click locations in the Clicked event if a Mouse2DEventTypes#CLICKED event without preceding Mouse2DEventTypes#PRESSED event was processed.
• CreateEdgeInputMode and CreateBendInputMode now cancel on MOUSE_LOST_CAPTURE_DURING_DRAG event.
• CreateEdgeInputMode did not show port candidates after re-installation of the input mode.
• Moving an edge label with SmartEdgeLabelModel that is owned by an edge without visible path no longer throws an exception.
• ItemHoverInputMode now resets the hovered item when moving the mouse out of the component.
• GraphEditorInputMode and GraphViewerInputMode no longer ignore changes to their sub-input modes after having been installed once.
• The HitTestRadius property of the following implementations of ICanvasContext now correctly contain the value in world coordinates instead of view coordinates:
  • The context created by ICanvasContext#create when passing a CanvasComponent but no hit test radius.
  • The context passed to IDisposeVisualCallback.
  • The context passed to IPositionHandlers by MoveInputMode.
  • The context passed to adjacent handles when moving a bend handle.
• Disabling MarqueeSelectionInputMode during the gesture via code left the marquee visible on the screen.
• When a selected stripe label is edited its TextArea now is correctly placed.
• While relocating edges, dropping a port over an invalid target or empty canvas no longer creates an empty undo unit.
• The Clicked and DoubleClicked events of ClickInputMode were sometimes missing when clicking on a node or edge. Now, they are always triggered unless the event was handled before.
• Snap lines which indicate the same size are no longer shown for implicitly re-sized parent group nodes.
• TextEditorInputMode: Inserting a line break now replaces selected text.
• Node-to-edge snapping is now disabled by default which is the documented and intended value. For this, the initial value of the GraphSnapContext#NodeToEdgeDistance property is set to -1.0.
• The LabelEditingEventArgs#Context#ParentInputMode property provided in the events GraphEditorInputMode#LabelAdding, GraphEditorInputMode#LabelEditing, TableEditorInputMode#LabelAdding and TableEditorInputMode#LabelEditing now contains the corresponding GraphEditorInputMode or TableEditorInputMode instance.
• The default implementation of IPortSnapResultProvider never returned any snap results.
• CreateEdgeInputMode: The ValidBeginCursor is now correctly hidden during edge creation when bend creation isn't allowed.
• CreateEdgeInputMode didn't always update the highlight of possible source port candidates when its ShowPortCandidates property was configured to show the source port candidates.
• GraphEditorInputMode/GraphViewerInputMode: Corrected the popup menu location if the menu is opened using the keyboard. Previously, the menu could appear outside the GraphComponent if the selected items or the current item were not completely inside the current viewport. Now the popup menu location (i.e. the menu's upper left corner) will be always inside the GraphComponent.
• ReparentStripePositionHandler: The source and target ghost visualization was not always updated correctly when custom ghosts were used.
• Changing the values of the CreateEdgeInputMode#DummyEdgeGraph#EdgeDefaults property had no effect for some interactions.
• Fixed a possible infinite loop in OrthogonalEdgeHelper.
• The cursor is now correctly reset after editing an orthogonal edge.
• Fixed a possible NullPointerException which could occur in customized LabelDropInputMode and PortDropInputMode classes.
• The CreateEdgeInputMode doesn't show port candidates anymore if bend creation is enforced (by pressing CTRL key during edge creation).
• The indicators for bend grid snapping were not always drawn at the correct position for bends which were implicitly moved with a selected edge.

Layout

• HierarchicLayout: Fixed problem where edges between group nodes contained superfluous bends if there were grouped edges in the input graph.
• Polyline.EdgeRouter: Fixed issue that sometimes caused weird edge routes if there are edges with intermediate routing points.
• Polyline.EdgeRouter: Fixed NullPointerException that was triggered when the list of intermediate points for an edge consisted of exactly two equal points.
• OrganicLayout: Fixed IllegalArgumentException that could appear if cycle substructure detection is enabled, see OrganicLayout#CycleSubstructureStyle.
• HierarchicLayout: Fixed an issue that caused non-symmetric results for grouped edges even though property SimplexNodePlacer#BaryCenterModeEnabled was enabled.
• OrthogonalLayout: Fixed rare infinite loop issue for grouped graphs.
• Polyline.EdgeRouter: Fixed rare NullPointerException.
• Polyline.EdgeRouter: Fixed NullPointerException that occurred when there were intermediate routing points and the path search got aborted (e.g. because of maximum duration time limit).
• ShortestPaths: Fixed possible NullPointerException that occurred when the a-star algorithm was applied to a graph with non-monotonic heuristic costs.
• HierarchicLayout: Fixed UnsupportedOperationException that was triggered when a DataProviderAdapter that does not implement IDataProvider#get was registered with key GivenLayersLayerer#LAYER_ID_DPKEY. The issue only appeared in conjunction with sub-components, see HierarchicLayout#SUB_COMPONENT_ID_DPKEY.
• FamilyTreeLayout: Fixed bug that caused that the preferred family member order wasn't considered, see FamilyTreeLayout#FamilyMembersSortingPolicy.
• GenericLabeling: Fixed bug that could cause that a label candidate with a lower profit (see AbstractLabeling#Profit) was preferred over another candidate with higher profit even though both candidates did not overlap with any other elements.
• GenericLabeling: Fixed unexpected labeling results that occurred if a label had label candidates with different sizes. The labeling algorithm previously calculated profits of candidates under the assumption that all candidates have equal size.
• HierarchicLayout: Fixed rare infinite looping issue for input graphs with fixed (i.e., non-incremental) nodes and layering constraints.
• Polyline.EdgeRouter: Fixed a rare bug that caused port candidate failures for edges grouped with fixed edges.
• Polyline.EdgeRouter: Fixed a bug that caused collinear bends and self-crossings to be removed from fixed edges. Now, such fixed edges are not changed anymore.
• HierarchicLayout: Fixed bug that sometimes caused a NullPointerException if the input graph contains port groups, see PortConstraintKeys#SOURCE_PORT_GROUP_ID_DPKEY and PortConstraintKeys#TARGET_PORT_GROUP_ID_DPKEY.
• HierarchicLayout: Fixed bug that sometimes caused superfluous bends if the edges were routed on a grid and the grid reference point was different from (0,0), see property NodeLayoutDescriptor#GridReference.
• GraphLayoutLineWrapper: Fixed bug that sometimes caused a large empty space inside the drawing.
• CircularLayout: Now correctly considers whether or not an inter-partition edge should be bundled or not (see EdgeBundleDescriptor#isBundled). Previously, when having multiple partitions, inter-partition edges where sometimes bundled even if the bundling property was disabled.
• HierarchicLayout: Fixed a bug where the edge thickness of grouped edge segments was not considered correctly (e.g. there was not enough space for a thick edge).
• BusRouter: Fixed non-deterministic behavior with respect to multiple runs that occurred in very rare cases.
• Corrected an error in the Rectangle2D#Contains(Rectangle2D) method. As a consequence of this error, the results of various algorithms and automatic layouts could have been wrong.
• OrthogonalLayout now considers edge grouping also if there are no directed edges specified.

Further Bugfixes

• GenericLabelModel serialization: Fixed cyclic reference in GraphML which could happen while serializing a GenericLabelModel with a parameter with associated descriptor.
• PolylineEdgeStyle now takes arrow heads into account for visibility checks.
• The default method IOrientedRectangle#getCenter didn't return the correct center if the width or height of the rectangle was equal to 0.
• Sometimes the GroupNodeDefaults#LabelDefaults#AutoAdjustingPreferredSizeEnabled property and the GroupNodeDefaults#PortDefaults#AutoCleanupEnabled property were not considered for labels and ports of groups.
• The GroupingSupport#hasGroupNodes method now returns only true if there are actually group nodes in the graph. Previously, it returned also true if there once were group nodes which had been removed in the meantime.
• TableNodeStyle: Fixed missing default visualization.
• Fixed a possible NullPointerException in TableNodeStyleRenderer when a TableNodeStyle is rendered with #Table set to null.
• The clone method now is overridable in all style implementations.

Incompatible Changes

• ReparentStripePositionHandler: All callback methods dealing with ghost objects have been renamed consistently:
  • UpdateXyzVisualization to UpdateXyzGhost.
  • UpdateTargetVisualizationBounds to UpdateTargetGhostBounds.
• The method Arrow#getAsFrozen was removed as there was no benefit in converting the Arrow instance in an immutable instance.
• The protected factory method MoveLabelInputMode#createLabelHitTestable has been removed. Developers who want to set a custom instance need to set it directly to the HitTestable property.
• The #CanvasClicked event of GraphEditorInputMode/GraphViewerInputMode now provides the GraphEditorInputMode/GraphViewerInputMode as parent input mode in the Context property of its ClickEventArgs.
• The ITable#RelativeLocation property has been removed. Use ITable#Insets with corresponding Left and Top values instead.
• Renamed all occurrences of Cleanup to CleanUp in API names.
• ItemClickedEventArgs now extends ClickEventArgs.
• CreateEdgeInputMode's EdgeCreator might receive null as targetPortCandidate parameter. Callbacks must handle this case by either creating a target port of their own or canceling the edge creation by returning null.
• The StripeSubregion#TargetTableNode property is now read-only.
• Renamed the enumeration value ShowFocusPolicy#WHEN_FOCUSED to ONLY_WHEN_FOCUSED.
• Renamed the Animator#destroy method to stop.
• The GraphEditorInputMode#createMoveUnselectedInputMode method has been removed. Use the property MoveUnselectedInputMode instead.
• The boolean CreateEdgeInputMode#PortCandidateShowingEnabled property has been replaced by the CreateEdgeInputMode#ShowPortCandidates property which has the enum type ShowPortCandidates.
• The boolean OverviewInputMode#AutoMouseWheelZoomEnabled property has been replaced by the OverviewInputMode#MouseWheelBehavior property which has the enum type MouseWheelBehaviors.
• Classes PropertyInfo, TypedKey, XamlHelper and XmlName were removed from the layout distribution where they were not used.
• CanvasComponent: Removed the events MouseWheelZoomFactorChanged, MouseWheelScrollFactorChanged, AutoDragChanged and HitTestRadiusChanged. These events are unneeded since the corresponding properties are not changed by library code.
• The method Pen#adopt has been renamed to #commit to better reflect what it really does.
• DpKeyBase has been renamed to AbstractDpKey and made an abstract class. AbstractDpKey and all subclasses now take the value type as additional constructor parameter. This value type may be retrieved through read-only property ValueType.
• IMapperRegistry: The value type parameter was removed from all default methods taking NodeDpKey, EdgeDpKey or ILabelLayoutDpKey.
• MoveViewportInputMode: The properties that controlled the inertia behavior have been removed since they no longer apply to the new algorithm. Instead, the new property InertiaDuration can be used to specify the duration of the inertia scrolling.
• GraphModelManager#HierarchicNodeNestingEnabled has been removed. Set the new HierarchicNestingPolicy property to HierarchicNestingPolicy#NONE to disable node nesting or to either HierarchicNestingPolicy#NODES or HierarchicNestingPolicy#NODES_AND_EDGES to use nesting. Similarly, GraphModelManager#HierarchicEdgeNestingEnabled has been removed. Use either HierarchicNestingPolicy#NODES_AND_EDGES to enable edge nesting or any other policy to disable it.
• The method CanvasComponent#animateScrollTo has been removed and is superseded by the new #zoomToAnimated methods.
• The property SliderEdgeLabelLayoutModel#AutoFlipping has been renamed to #AutoFlippingEnabled.
• The property TableLayoutConfigurator#Compaction has been renamed to #CompactionEnabled.
• The property GraphPartitionManager#FiringGraphEventsEnabled has been removed.
• The overloads of ValueSerializer#getSerializerFor taking no context have been removed.
• The class com.yworks.yfiles.layout.hierarchic.GroupingSupport has been removed.

Changes of Default Behavior

• The IGraph#setNodeLayout method and the various methods to create a node now throw an IllegalArgumentException if the layout rectangle contains one or more NaN values. Similarly, the IGraph#setBendLocation and the various methods to add a bend to an edge now throw an IllegalArgumentException if the location point contains one or two NaN values.
• By default, stripe labels that are programmatically selected or highlighted don't show a selection or highlight indicator anymore.
• Inertia scrolling of the viewport behaves now in a more natural way. The scrolling stops now after a fixed amount of time. Previously, the duration depended on the initial inertia velocity.
• GraphML: Duplicate properties on XAML input are now considered an error in accordance with the XAML specification.
• The stroke thickness is now considered for the calculation of the origin of the default arrow visualizations. This can result in a slightly different rendering of the arrows.
• The CreateEdgeInputMode#DummyEdge property is now always reset after the edge creation was finished or canceled.
• RectD#isFinite and SizeD#isFinite now also consider empty instances as not finite.
• MoveLabelInputMode: The moved label now is visualized as a preview instead of a symbolic rectangle. Set the Visualization property to Visualization#GHOST to restore the old mode.
• The LayoutExecutor#ContentRectUpdatingEnabled property is now enabled by default.
• CreateEdgeInputMode: The determination whether the mouse hovers over a valid end has changed. If ForcingSnapToCandidateEnabled is disabled, the EndHitTestable now is queried first and a target port candidate is only searched if the hit testable returns true. Previously, the hit testable was only queried if no target port candidate was found at the current location.
• Previously, even if the GraphModelManager#UsingHierarchicEdgeNestingEnabled property was set to true, canvas objects for edges were added to the GraphModelManager#EdgeGroup as long as no group nodes were part of the graph. The corresponding new HierarchicNestingPolicy NODES_AND_EDGES has no such behavior and thus, EdgeGroup is empty by default. Use one of the other polices if canvas objects for edges should be part of EdgeGroup.
• PolylineEdgeStyle defaults to an improved smoothing algorithm when using the SmoothingLength property. This is especially apparent when using large values for SmoothingLength.
• The method CollapsibleNodeStyleDecorator#createSelectionInstaller has been removed.
• ClickInputMode now dispatches the more specific events LeftClicked, RightClicked, LeftDoubleClicked and RightDoubleClicked before the general Clicked and DoubleClicked events. Hence, Clicked and DoubleClicked will only be triggered if the event wasn't handled before.

Deprecated

• The properties LayerConstraintFactory and SequenceConstraintFactory of HierarchicLayoutData have been marked as deprecated. The new properties LayerConstraints and SequenceConstraints should be used instead. Similarly, the factory methods LayoutUtilities#createLayerConstraintFactory(IGraph) and LayoutUtilities#createSequenceConstraintFactory(IGraph) have been marked as @Deprecated.
• PartitionGrid#hasAtLeastTwoNonEmptyRows has been marked as @Deprecated and may be removed in future releases.

Improvements

Demos

• Added new demos:
  • The GraphEvents demo can be used to explore the different kinds of events dispatched by yFiles for Java.
  • The IsometricDrawing demo displays graphs in an isometric fashion to create an impression of a 3-dimensional view.
  • The EdgeBundling demo shows how to reduce visual clutter through edge bundling.
  • The Uml demo shows interactive creation and editing of UML class diagrams.
• PDFImageExportDemo, SVGImageExportDemo and SVGNodeStyleDemo: Made the build scripts Java 9 ready.

Viewer

• Improved general rendering performance, which especially affects large graphs dramatically.
• GridVisualCreator now respects the clip of the render context passed to its #createVisual and #updateVisual methods.
• IArrow#CIRCLE now uses a real circle for rendering.
• Removed unusable SnapLine resource keys from CanvasComponent's client properties.

Bugfixes

Viewer

• GraphEditorInputMode and GraphViewerInputMode no longer ignore changes to the sub-input modes exposed as properties after having been installed once.
• Fixed a bug in CanvasComponent that moved the viewpoint too much when changing the zoom property.
• Fixed a bug in GraphML serialization that always looked for singletons on classes that were annotated with @GraphML even if the GraphML#singletonContainers property was not set.
• TextEditorInputMode: The size calculation for the editing #TextArea was fixed to respect all properties of the #TextArea.
• TextEditorInputMode: Using ENTER as #LineBreakRecognizer no longer results in two new lines each time ENTER is pressed.
• Fixed a bug that might occur when changing wrapped styles in CollapsibleNodeStyleDecorator, ShadowNodeStyleDecorator, FixedShapeShadowNodeStyleDecorator and NodeStylePortStyleAdapter.
• DefaultLabelStyle: Fixed line breaks when text wrapping is enabled.
• Added missing Obfuscation annotation for DashStyle constants.
• Fixed serialization of shared collection resources.
• Fixed parsing of font style constants of GraphML files written with yFiles for Java 3.0.
• DefaultLabelStyle: Fixed #updateVisual to take all style properties into account when determining whether or not the visualization has to be re-created.
• AbstractJComponentStyle: Fixed a bug that prevented serialization of the #ContextLookup property after obfuscating the library.
• XmlWriter: Fixed JDK 9 only additional, undesired whitespace when writing CData nodes.
• Several context implementations throughout the library now use the correct value in world coordinates for the HitTestRadius property instead of view coordinates:
  • The context created by ICanvasContext.createCanvasContext when passing a CanvasComponent, but no hit test radius.
  • The IRenderContext passed to IDisposeVisualCallback.
  • The IInputModeContext passed to IPositionHandlers by MoveInputMode.
  • The IInputModeContext passed to adjacent handles when moving a bend handle.
• InteriorStretchLabelModel#getMinimumNodeSize now uses the correct insets for width calculation. Previously the top insets were erroneously used for the width.
• The NodeStyleStripeStyleAdapter#updateVisual method always created a new visual by delegating to the #createVisual method.
• Mouse wheel zoom during an input gesture no longer results in incorrect coordinates for the subsequently dispatched mouse event.
• Switching the GraphComponent's #InputMode in a key event handler no longer throws an exception.
• MapperRegistry#addMapper no longer throws an exception when trying to replace a mapper for an existing key.
• Labels with NinePositionsEdgeLabelModel now disappear when the owner edge has no visible edge path. This can happen for example when nodes are moved onto each other. Previously they appeared at unexpected locations, including the origin (0,0) and the upper left corner of the source node.
• GeneralPath#getTangent now returns null if there is no tangent at the requested position. Previously, it returned a bogus tangent.
• FreeLabelModel#INSTANCE, FreeEdgeLabelModel#INSTANCE, and FreeNodeLabelModel#INSTANCE are now serialized correctly to GraphML when not used as part of their parameters (e.g. within CompositeLabelModel).
• Fixed an unnecessary exception in IGraph#calculateLabelPreferredSize which was thrown when the label owner was not part of the graph, but all optional parameters have been passed anyway. In that case there was no need to fetch the appropriate LabelDefaults and thus the question of whether the owner is in the graph or not is irrelevant.
• During reparenting, the edges at reparenting nodes were drawn below the group(s) and thus they were not visible. If reparenting was canceled, these edges stayed behind the group(s) and remained invisible.
• CreateEdgeInputMode did not always start correctly for quick gestures on slow devices.
• CreateEdgeInputMode did not trigger the #EdgeCreationStarted event for programmatic initialization of the edge creation gesture.
• HandleInputMode's #CurrentHandle property could not always be obtained during the #DragFinished, #DragFinishing, #DragCanceling, and #DragCanceled events of HandleInputMode.
• Setting CreateEdgeInputMode's #CancelRecognizer could potentially get the input mode into a broken state.
• The ICommand#COPY command is no longer executed twice.
• Fixed a bug in ViewportAnimation that sometimes moved the viewport a bit before the animation started.
• Fixed an exception in DropInputMode which occurred if a drag enter was recognized while another drag action was still running.
• CreateEdgeInputMode no longer fires gesture cancel events if it has not been started before.
• StripeDropInputMode no longer calls #ItemCreator twice.
• The StripeDropInputMode#ItemCreated event was not raised.
• GeneralPath#isVisible often returned true for invisible paths.
• UndoEngine now uses the end time of the previous undo unit for automatic bracketing instead of the start time. This improves auto-bracketing to work as intended for undo units spanning a time greater than #AutoMergeTime.

Layout

• Corrected an error in the Rectangle2D#contains(Rectangle2D) method. As a consequence, the results of various algorithms and automatic layouts could have been wrong.
• PortPlacementStage: Fixed bug that caused NullPointerException when the ports of edges in the input graph were outside the node bounds.
• BusRouter: Fixed rare NullPointerException that could be triggered if there are buses with both fixed and movable edges at the same time.
• AbstractLabelLayout: Fixed bug that the box returned by AbstractLabelLayout#BoundingBox was not consistent with the bounding box of the oriented box (AbstractLabelLayout#OrientedBox). This was the case when the mutable oriented box instance was changed.
• LayeredNodePlacer: Fixed bug that caused node-edge overlaps for some configurations.
• MultiPageLayout: Fixed bug that edge type EdgeType#PROXY was never used.
• Setting PartialLayout#EdgeRoutingStrategy to StraightLine erroneously rerouted all edges in the graph instead of just the ones that were required.
• polyline.EdgeRouter: Fixed RuntimeException that could be triggered when the graph contained fixed edges (see EdgeRouter#SphereOfAction) with very short segments.
• HierarchicLayout: Fixed IllegalArgumentException that could be triggered when the user specified both edge directedness (see HierarchicLayout#EDGE_DIRECTEDNESS_DPKEY) and layering constraints.
• OrthogonalLayout: Fixed rare bug that caused node-edge overlaps.
• HierarchicLayout and SimplexNodePlacer: Fixed rare IllegalArgumentException that could be triggered when the input graph had a partition grid and PortCandidates or PortConstraints.
• OrganicRemoveOverlapsStage: Improved adherence to the specified maximum duration.
• HierarchicLayout: Improved port assignment for edges incident to group nodes that are routed directly (see EdgeLayoutDescriptor#DirectGroupContentEdgeRouting). Previously, such edges were often reversed.
• HierarchicLayout: Fixed bug that caused violation of specified PortCandidates of edges with labels with preferred placement specifier LabelPlacements#AT_SOURCE_PORT or LabelPlacements#AT_TARGET_PORT when using an orientation other than top-to-bottom.
• SeriesParallelLayout: Fixed bug that caused misplaced edge labels for graphs containing only a single edge.
• HierarchicLayout: Improved adherence to the specified maximum duration by applying a suitable runtime restriction to class PortCandidateOptimizer. Previously, this class didn't have any runtime restrictions.
• OrthogonalLayout: Fixed rare bug that caused overlapping nodes.
• OrthogonalLayout: Improved from-sketch mode (see UseSketchDrawing) in conjunction with node labels or node halos. Previously, in the presence of the mentioned elements, the layout results did not always correctly resemble the sketch drawing, even if it was a good sketch.
• HierarchicLayout: Fixed bug that caused that property HierarchicLayout#ComponentArrangementPolicy was not correctly considered when there are undirected edges (see HierarchicLayout#EDGE_DIRECTEDNESS_DPKEY).
• HierarchicLayout: Fixed bug that lead to edge ports lying outside the node boundaries when using the edge thickness feature (i.e. edges with thickness greater than zero, see HierarchicLayout#EDGE_THICKNESS_DPKEY) together with a (rather large) grid spacing value and the default port assignment PortAssignmentMode#DEFAULT.
• HierarchicLayout: Fixed bug that caused unnecessarily large layer distances in case that there exist empty partition grid rows with a minimum row height.
• HierarchicLayout with partition grid: Fixed bug that in some cases caused an IllegalArgumentException when the layout algorithm was configured to stop after the layering or sequencing phase (see HierarchicLayout#StopAfterLayeringEnabled and HierarchicLayout#StopAfterSequencingEnabled).
• DefaultNodePlacer: Fixed bug in DefaultNodePlacer#MinimumLastSegmentLength that caused that the value of DefaultNodePlacer#MinimumFirstSegmentLength was returned.
• TreeLayout: Fixed bug in DefaultPortAssignment that caused a memory leak.
• TreeLayout: Fixed bug in the integrated edge labeling feature that caused that multiple edge labels were not always ordered correctly along the edge with respect to their preferred placement setting (i.e., place at source, center or target preference). For example, a source label should always come before a target label in the direction of the actual edge flow.
• polyline.EdgeRouter: Fixed bug that sometimes caused a violation of the minimum first or last segment length if they were set to relatively large values.
• OrthogonalLayout: Fixed rare bug that caused non-orthogonal line segments and bad edge end points.

Incompatible Changes

View

• CreateEdgeInputMode now triggers the EdgeCreationStarted event for programmatic edge creation with the doStartEdgeCreation method.

General Improvements

• The naming of classes, members and parameters has been reviewed and now uses more consistent and intuitive names. Please consult the Developer's Guide for a complete list of renamings.
• Some functionality has been removed from the API to reduce its complexity and some of the functionality has been moved to different classes or packages. Again, see the Developer's Guide to get a full list of moved/removed functionality.

Features

Layout

• HierarchicLayout: Added support for port grouping, see PortConstraintKeys#SOURCE_GROUP_ID_DPKEY and PortConstraintKeys#TARGET_GROUP_ID_DPKEY. Edges are bundled at their ports, but routed independently.
• HierarchicLayout now allows to specify the directedness of edges, see HierarchicLayout#EDGE_DIRECTEDNESS_DPKEY. This new feature enables to, for example, support mixed graphs that contain both directed and undirected edges: While for directed edges the layering step tries to find a solution where the source of an edge is placed above the target (with respect to the main layout direction), for undirected edges the direction doesn't matter and the edge may also be inserted as same-layer edge. This feature also enables to force some edges to specifically point against the main layout direction.
• HierarchicLayout: Added support for edges with a specific thickness. Minimum distances in the layout will consider these thicknesses, see HierarchicLayout#EDGE_THICKNESS_DPKEY.
• LabelPlacements: Added preferred placement specifiers #AT_SOURCE_PORT and #AT_TARGET_PORT for edge labels which express that the label should be placed directly at the source/target port of the edge. Currently, the specifiers are only considered by the integrated labeling of the HierarchicLayout and can be specified with property PreferredPlacementDescriptor#PlaceAlongEdge.
• OrganicLayout now supports the detection of regular substructures in the graph (see methods #setChainSubstructureStyle(ChainSubstructureStyle), #setStarSubstructureStyle(StarSubstructureStyle), #setCycleSubstructureStyle(CycleSubstructureStyle), and #setParallelSubstructureStyle(ParallelSubstructureStyle) and applies a specific layout style to them such that they can be better recognized.
• TreeReductionStage: Added possibility to specify a custom labeling algorithm that places labels of non-tree edges. Now, users do not need to take care of such edge labels themselves after using a tree layout algorithm on a non-tree input graph in conjunction with the reduction stage. See properties #NonTreeEdgeLabelingAlgorithm and #NonTreeEdgeLabelSelectionKey.
• SeriesParallelLayout: Added possibility to specify a custom labeling algorithm that places labels of non-series-parallel edges. Such labels are now automatically handled. Users do not need to handle them after running the algorithm with a non-series-parallel input graph. See properties #NonSeriesParallelEdgeLabelingAlgorithm and #NonSeriesParallelEdgeLabelSelectionKey.

Improvements

Viewer

• IGraph: The default methods #applyLayout(ILayoutAlgorithm) and #applyLayout(ILayoutAlgorithm, LayoutData) have been added.
• FilteredGraphWrapper now no longer queries the node and edge predicates as often.
• IMapperRegistry: Several overloads for the #create*Mapper methods have been added that take more specific tags but allow to omit the keyType parameter.
• GraphComponent: Four #morphLayout convenience methods have been added that run a layout on the graph of the component and animate the results.
• The property GraphComponent#GraphMLIOHandler has been added to set a custom GraphMLIOHandler to be used by the IO commands and convenience IO methods. Previously the lookup of the class needed to be decorated.
• GraphComponent: The overloads #importFromGraphML(java.io.Reader), #importFromGraphML(java.io.InputStream), #exportToGraphML(java.io.OutputStream, java.net.URI) and #exportToGraphML(java.io.Writer, java.net.URI) have been added.
• Animator: A getter for the CanvasComponent, which had been passed to the constructor, was added.
• The types of the static #INSTANCE fields of VoidNodeStyle, VoidEdgeStyle, VoidLabelStyle, VoidPortStyle, VoidStripeStyle and VoidStripeStyleRenderer have been changed to the concrete types instead of the interface types (e.g. INodeStyle).
• IconLabelStyle: A constructor has been added that only takes a custom renderer as argument.
• Class DefaultPortCandidateDescriptor, which is used to visualize IPortCandidates, now provides static ResourceKey fields that are used to lookup IVisualTemplates for the different states of IPortCandidates. Custom IVisualTemplates can be used by either registering them via CanvasComponent#putClientProperty or by the new convenience method DefaultPortCandidateDescriptor#setTemplate.
• Resizing a table row or column now respects the GraphEditorInputMode#AdjustContentRectPolicy.
• CreateEdgeInputMode now respects the settings #SnappingBendsToSnapLinesEnabled and #SnappingBendAdjacentSegmentsEnabled on GraphSnapContext. It also handles grid snapping according to the configuration for snapping.
• Nodes now show their target grouping hierarchy z-order during a reparenting gesture.
• GraphMLIOHandler now has #addXamlNamespaceMapping methods for easier control of the XML namespace for certain types.
• GraphMLIOHandler has two new events, #QueryType and #QueryName that allow for fine-grained control over XML namespace writing and parsing for certain types.
• GraphMLIOHandler: The overloads #read(IGraph,java.io.Reader), #read(IGraph, java.io.InputStream), #write(IGraph, java.io.OutputStream, java.nio.charset.Charset, java.net.URI) and #write(IGraph, java.io.Writer, java.net.URI) have been added.
• GraphMLParser: The overloads #parse(IGraph,Reader,IGraphElementFactory) and #parse(IGraph, InputStream, IGraphElementFactory) have been added.
• GraphML: The performance for parsing java enums and FlagsEnums has been improved.
• GraphML: Parsing java enums and FlagsEnums has been refactored and now respects SerializationProperties#IGNORE_PROPERTY_CASE.

Layout

• HierarchicLayout: Slightly reduced the number of bends when integrated edge labeling is enabled.
• HierarchicLayout: Fixed unstable from-sketch behavior for non-default layout orientations when group nodes are folded or expanded. Applies to orientations LayoutOrientation#LEFT_TO_RIGHT, LayoutOrientation#RIGHT_TO_LEFT and LayoutOrientation#BOTTOM_TO_TOP. Geometry information registered with data providers with keys HierarchicLayout#ALTERNATIVE_GROUP_BOUNDS_DP_KEY and HierarchicLayout#ALTERNATIVE_EDGE_PATH_DP_KEY is now automatically rotated according to the specified layout orientation.
• HierarchicLayout: Improved support for PortCandidates at group nodes. Previously, they were only obeyed if there was just a single candidate defined, which also applied to the opposite node (not necessarily a group node). Now, out of the given candidates, one is selected and considered for the routing. Still, fixed candidates are treated like free ones and are not supported at the side of group nodes.
• HierarchicLayout: Routing of grouped edges that connect to nodes of different groups now assures that the whole bus segment remains outside the different group nodes. This avoids that group nodes get unnecessarily large and potentially makes drawings more symmetric.
• HierarchicLayout: Improved edge grouping such that it is now possible to group incoming/outgoing edges as well as same-layer/backloop edges with common edges.
• HierarchicLayout: Can now take the original edge route into account to determine the route of a self-loop.
• MultiPageLayout: Added new option #StrictClusterSeparationEnabled that allows to specify whether or not nodes with different cluster IDs may be placed onto the same page.
• The tree algorithms BalloonLayout, TreeLayout and AspectRatioTreeLayout now support custom selection of the root node of the tree.
• BalloonLayout: Interleaved child placement now works in conjunction with from sketch-mode and custom child order comparators. This means that the settings #FromSketchModeEnabled and #Comparator are no longer ignored when enabling the interleaved placement mode (see #InterleavedMode).
• TreeLayout: Now take into consideration the minimum group node size specified by the user with a IDataProvider registered with the graph with key GroupingKeys#MINIMUM_NODE_SIZE_DPKEY.
• SeriesParallelLayout: Now takes into consideration the minimum node size specified by the user with a IDataProvider registered with the graph with key GroupingKeys#MINIMUM_NODE_SIZE_DPKEY.
• Improved the runtime of EdgeRouter when routing edges that have PortConstraints or PortCandidates.
• Improved the performance of OrthogonalSegmentDistributionStage and thus also ChannelEdgeRouter which by default uses the mentioned stage as edge distribution strategy.
• ChannelRouter: Improved order of segments to avoid edge crossings when there are multiple segments that have one common end point.
• Improved the performance of PartialLayout for input graphs that feature a high number of large subgraph components. Does not apply for component assignment strategy ComponentAssignmentStrategy#SINGLE.
• LayoutUtilities#applyLayout now supports layout of tables.
• ItemMapping: The property #Mapper is now automatically set on first read-access to the property, enabling more convenient use of the mapper without first having to instantiate a matching instance.
• PartitionGridData: It is now sufficient to specify one of a row mapping or the column mapping. The unspecified one will automatically be set to 0, resulting in a single row or column being used.
• BalloonLayoutData, HierarchicLayoutData, LabelingData, OrthogonalLayoutData, SeriesParallelLayoutData and TreeLayoutData now have an EdgeLabelPreferredPlacement property which supports an ItemMapping for edge labels to provide a PrefererredPlacementDescriptor. Can be used as alternative to mappers registered with LayoutGraphAdapter#EDGE_LABEL_LAYOUT_PREFERRED_PLACEMENT_DESCRIPTOR_DPKEY.
• PlanarEmbedding has been added and allows to calculate and query an embedding of a planar graph.

Bugfixes

Viewer

Model

• Fixed a bug in IGraph#addLabel that ignored an explicitly specified preferred size if folding is enabled.
• FilteredGraphWrapper: The fail-fast mechanism to detect concurrent modification changes in the #Nodes, #Edges, #Labels and #Ports IListEnumerables didn't detect all modifications correctly.
• Folding:
  • Fixed a bug that sometimes ignored the view state for a port on a folder node when a folding edge was created.
  • Fixed a potential exception when using folding on a filtered graph when either nodes with labels or ports, or edges with bends or labels are shown for the first time after being hidden before.
  • Fixed a bug that treated group nodes with no children als non-group nodes after they have been expanded.
  • Fixed a bug that creates folders with empty size when manually creating groups and the folding view is configured to collapse group nodes by default.
• SandwichLabelModel: Fixed incorrect DefaultValue annotation for some created parameters.
• SmartEdgeLabelModel: An exception was thrown if the path of the corresponding edge contained bends that were close together or at the same location.
• NinePositionsEdgeLabelModel: Fixed the placement for the positions #SOURCE_BELOW and #TARGET_BELOW.

Geometry

• GeneralPath#equals does no longer check for path equivalence (same coordinates etc.), but simply checks reference equality. This makes it consistent with the #hashCode method. To check for path value equivalence, use the new method #isEquivalentTo instead.

View

• Fixed GraphComponent's #importFromGraphML(java.io.File) method to respect the GraphMLIOHandler's #ClearingGraphBeforeReadEnabled property. (All the other #importFromGraphML methods already did so.)
• Label text isn't mirrored anymore if ComponentOrientation#RIGHT_TO_LEFT is set on the GraphComponent.
• GraphOverviewComponent: Setting a new #OverviewInputMode updates now the #InputMode property accordingly.
• Fixed a bug that might occur when changing wrapped styles in CollapsibleNodeStyleDecorator, ShadowNodeStyleDecorator, NodeStyleLabelStyleAdapter and NodeStylePortStyleAdapter.
• Fixed a bug in GraphModelManager that didn't update the child groups if a new #ContentGroup is set.
• Fixed a bug in GraphModelManager where #HierarchicEdgeNestingEnabled set to false was not respected when the graph changed or a group node was created first on a yet ungrouped graph.
• Fixed some styles to call IRenderContext#childVisualRemoved after the IVisual actually has been removed instead of just before the removal.
• Fixed a possible NullPointerException in the graph rendering code when items were removed from the graph during their style's #updateVisual method. This could happen when removing graph items from a different thread (which is still not supported, but at least this particular case won't crash anymore).
• Fixed the maximum y-coordinate for horizontal grid lines produced by GridVisualCreator with grid style LINES.

Input

• All shortcuts have been adapted to the operation system conventions, e.g. shortcuts on Mac do not use the Control key anymore but the Command key as modifier instead.
• CreateEdgeInputMode: Fixed a bug that didn't show the edge preview when the edge would be created between a node and one of its ancestors or vice versa.
• CreateEdgeInputMode: The #EdgeCreated event triggered before the corresponding undoable edit was committed. This could result in a broken undo queue, if e.g. an animated layout was started during in the event listener. The event now triggers after the edit has been committed. With automatic undo unit merging, this should not make a difference for the end user, however from the perspective of the code there will be two subsequent edits, rather than one compound, if the code in the listener actually modifies the edge.
• CreateEdgeInputMode: Fixed a bug that broke the edge preview after the input mode was uninstalled and reinstalled again.
• Fixed a bug in bend creation for orthogonal edges when grid snapping was enabled.
• A bug in orthogonal edge editing was fixed where an edge could become non-orthogonal when a non-selected bend was moved.
• Fixed an issue with orthogonal edge editing where canceling moving a port or node would add bends to otherwise straight edge segments.
• Self-loops with same source and target location are now treated as orthogonal.
• When dragging an unselected bend and canceling the gesture by pressing ESC, the dragged bend was removed.
• Fixed a bug that prevented individually disabling certain grouping commands.
• OverviewInputMode: Fixed a bug that could break the overview visualization if the overview has a specific very small width or height.
• StripeDropInputMode: Fixed a bug that could result in nodes being moved to a wrong stripe when a new stripe was created or an existing one relocated.
• NodeDropInputMode: Fixed a possible exception when snapping is enabled, but preview disabled.
• When a node and its parent group node were both selected and moved with the SHIFT key held down the node was erroneously reparented to the root.
• Fixed reparent highlighting when multiple nodes are reparented together.
• Fixed an issue where the parameter finder for FreeEdgeLabelModel cannot place the label correctly for self-loops. Labels previously always appeared at the port location in this case.
• Hiding INodeSnapResultProvider or IBendSnapResultProvider from the lookup no longer leads to a crash when nodes or bends are moved.
• Fixed an issue where ICommand#EDIT_LABEL would not work directly on labels when a TableEditorInputMode is active.

Styles

• DefaultLabelStyle: Fixed vertical text alignment for instances with non-empty insets.
• IconLabelStyle: Fixed a NullPointerException that occurred when rendering the style while the #Icon property is set to null

GraphML

• Fixed a bug in GraphML parsing that prevented finding the annotated @GraphML#contentProperty of a class.
• Fixed a bug in GraphML parsing that could result in an exception when parsing an empty text element.
• Fixed a bug in GraphML serialization that ignored @GraphML annotations for static fields.
• Fixed structured GraphML serialization of DashStyle, Pen and URL instances.
• The ValueSerializer used for predefined Pens and IArrows now also respects the SerializationProperty#IGNORE_PROPERTY_CASE.
• Methods GraphMLIOHandler#addRegistryOutputMapper(String,Object) and #addRegistryOutputMapper(String, String, Object, IEventListener) created multiple GraphML key definitions for the same mapper instance
• Arrow: Added @Obfuscation annotation to exclude the class from obfuscation. Excluding Arrow from obfuscation is necessary for properly reading (and writing) GraphML files.
• Fixed the @DefaultValue annotations for the #Pen and #Paint properties in ArcEdgeStyle, PolylineEdgeStyle, GeneralPathNodeStyle and ShapeNodeStyle.
• Fixed GraphML (de-)serialization of ports using SegmentRatioPortLocationModel and corresponding port location parameter instances.

Layout

• HierarchicLayout: Fixed bug that caused a violation of the specified minimum distance or edge overlaps in the case of same-layer edges.
• HierarchicLayout: Fixed rare bug that caused same-layer edge to cross through their source or target node, e.g., the port was at the top of the source node but the edge crossed through the source node to leave it at the bottom.
• HierarchicLayout: Fixed bug that sometimes caused the route of back-loop edges with at least one endpoint incident to a group node to unnecessarily enter this group node.
• HierarchicLayout: Fixed bug that sometimes caused superfluous bends in edge routes when integrated edge labeling was enabled.
• HierarchicLayout: Fixed bug that caused that the directedness of edges incident to groups wasn't considered correctly (see HierarchicLayout#EDGE_DIRECTEDNESS_DP_KEY).
• HierarchicLayout: Fixed bug that caused node-edge overlaps in conjunction with some complex edge grouping specifications.
• RecursiveGroupLayout when used with HierarchicLayout as core layout algorithm: Fixed IllegalStateException that could be triggered when group nodes of the input graph have PortCandidates.
• RecursiveGroupLayout: Fixed bug that caused edges to share the same port even though they should be assigned to different ports. Note that this problem only appeared if the core layout algorithm (see CoreLayout) is an instance of class HierarchicLayout.
• SimplexNodePlacer: Fixed bug that caused overlaps between edges and nodes when enabling node compaction (see #NodeCompaction) and having edges with either strong PortConstraints or PortCandidates.
• OrganicLayout: Fixed bug that caused group nodes with zero height/width in the layout result. The bug appeared when having empty groups, group node insets smaller than one (defined via GroupingKeys#GROUP_NODE_INSETS_DPKEY) and no minimum group node size specified (GroupingKeys#MINIMUM_NODE_SIZE_DPKEY).
• OrganicLayout and ClassicOrganicLayout: Fixed bug that caused the algorithm to not consider the specified custom IGroupBoundsCalculator (see ClassicOrganicLayout#GroupBoundsCalculator).
• Fixed OrganicLayout ignoring the GroupNodeMode settings.
• OrganicLayout, ClassicOrganicLayout and InteractiveOrganicLayout: Fixed IllegalArgumentException that was triggered due to NaN values that could occur in case the input graph has a very large number of nodes.
• CircularLayout and RadialLayout: Fixed bug that caused that always all edges are bundled if bundling is enabled for at least one single edge. More precisely, property EdgeBundleDescriptor#Bundled wasn't considered correctly.
• CircularLayout: Fixed bug that in some cases produced self-intersecting edges when edge bundling is enabled.
• SingleCycleLayout: Fixed bug that may lead to a ClassCastException if edge bundling is enabled and a custom node sequencer is specified (see SingleCycleLayout#NodeSequencer).
• AspectRatioTreeLayout#ROOT_PLACEMENT_DPKEY is now of type NodeDpKey<RootPlacement>.
• AspectRatioTreeLayout#SUBTREE_ROUTING_POLICY_DPKEY is now of type NodeDpKey<SubtreeArrangement>.
• AspectRatioTreeLayoutData did not register the correct values with the graph for the root placement and the subtree routing policy.
• MultiPageLayout: Fixed rare bug that sometimes caused straight-line edge routes instead of orthogonal routes.
• IsolatedGroupComponentLayout: Fixed bug that caused edge labels that intersect with group nodes even though option ComponentLayout#LabelConsiderationEnabled is enabled.
• EdgeRouter: Fixed rare RuntimeException that appeared if there were fixed (see #Scope) and grouped edges at the same time.
• EdgeRouter: Fixed rare IllegalArgumentException that was triggered when having multiple target port candidates, where at least one must be fixed. Furthermore, to trigger the exception it is necessary that the path search algorithm tries to perform an early exit due to maximum duration restrictions or a stop request via AbortHandler.
• EdgeRouter: Fixed bug that caused violations of minimum first/last segment lengths of grouped edges when using different edge layout descriptors and, second, made the layout algorithm remove a user-registered IDataProvider with key EdgeRouter#EDGE_LAYOUT_DESCRIPTOR_DPKEY.
• EdgeRouter: Fixed rare node overlaps in conjunction with monotonic path restrictions (see EdgeLayoutDescriptor.MonotonicPathRestriction).
• ChannelEdgeRouter: Fixed routing of self-loops that have both source and target end point at the same side of the node. Previously, when multiple such self-loops were present at the same node, the routing produced bad end points located outside of the node.
• Groups#hierarchicalClustering(Graph,int,INodeMap,INodeDistanceProvider,Linkage): Fixed NullPointerException that occurred when the given maximum number of clusters was 0 or 1.
• Fixed NullPointerExceptions in some LayoutData implementations that could happen if some of the mappings where accessed but were never really used in client code.
• Fixed a bug in TableLayoutConfigurator which altered the size of a column or row if an edge routing algorithm has been applied.
• Fixed a bug in TableLayoutConfigurator which sometimes used the wrong table insets.
• LayoutGraphAdapter/CopiedLayoutIGraph: IMappers which use ILabels as key and boolean, int or double as value are now correctly translated into data providers for layout algorithms.
• Fixed a bug that a dataprovider with key LayoutGraphAdapter#EDGE_LABEL_LAYOUT_PREFERRED_PLACEMENT_DESCRIPTOR_DPKEY that has been filled by a LayoutData has been ignored.

Incompatible Changes

Viewer

Model

• IGraph: The signature of method #addBend(IEdge, int, PointD) has been changed to #addBend(IEdge, PointD, int).
• IMapperRegistry: Renamed the methods #add* to #create*. The type of property #MapperMetadata has been changed from IMapperMetadata to MapperMetadata.
• DefaultGraph and AbstractGraphWrapper: The signature of method #addBend(IEdge, int, PointD) has been changed to #addBend(IEdge, PointD, int).
• FoldingEdgeState: The signature of method #addBend(int, PointD) has been changed to #addBend(PointD, int).

Geometry

• GeneralPath: The return value type of method createPath has been changed from Path3D.Double to Path3D.

View

• Most implementations and some usages of IAnimation have been removed and are now available as factory methods in IAnimation. This included the classes LayoutMorpher, EasedAnimation, GeneralPathAnimation, ParallelAnimation, LabelAnimation, NodeAnimation, PortAnimation, EdgeAnimation.
• GraphModelManager: Signature of method #typedHitElementsAt(IInputModeContext, Class<T>, PointD, ICanvasObjectGroup) has been changed to #typedHitElementsAt(Class<T>, IInputModeContext, PointD, ICanvasObjectGroup).
• CanvasComponent: The property #Editable has been removed. It had no effect on almost all input modes anyway. To no longer allow editing a CanvasComponent use a different input mode instead, e.g. GraphViewerInputMode, or configure the current input mode in a way that it no longer allows changes.
• GraphComponent: Decorating the lookup of GraphComponent or IGraph to set the GraphMLIOHandler used by the IO commands and convenience IO methods on GraphComponent is no longer supported. Use the #GraphMLIOHandler property on GraphComponent instead.
• The interface IRectanglePainter has been replaced by the more powerful interface IVisualTemplate. Implementations have been adjusted accordingly and members and classes with name *Painter or *RectanglePainter have been renamed to *Template or *VisualTemplate.
• EdgeDecorationInstaller: The method #getBendVisual(IRenderContext,IBend) returning an IVisual was replaced by the method #getBendDrawing(CanvasComponent,IEdge) returning an IVisualTemplate that is used for all bends of the passed edge.
  The subclasses EdgeFocusIndicatorInstaller, EdgeHighlightIndicatorInstaller and EdgeSelectionIndicatorInstaller now contain static ResourceKey fields #BEND_TEMPLATE_KEY that can be used to register custom IVisualTemplates for bends on the GraphComponent.

Input

• The command mechanism has been refactored:

  • ICommand, CommandAction, CommandBindingAction have been moved to package com.yworks.yfiles.view.input. Classes Command, CommandBinding, CommandManager, CanExecuteRoutedEventArgs, ExecutedRoutedEventArgs as well as the related properties on CanvasComponent have been removed. KeyboardInputMode offers new methods #addCommandBinding and #addKeyBinding for binding commands to actions and keyboard gestures to commands.
  • Class KeyboardInputMode has been refactored. New interfaces CanExecuteCommandHandler and ExecuteCommandHandler for handling commands have been introduced. All methods for binding commands to IEventListener implementations have been retrofitted to the aforementioned handlers. All methods for removing command or key bindings have been removed. Methods for adding such bindings now return a KeyboardInputModeBinding instance that offers a #remove method for this purpose.
• OverviewInputMode now allows to zoom out further.
• OrthogonalEdgeEditingContext: Changed return value of methods #getMovementInfos(IEdge) and #getSegmentOrientations(IEdge) to IListEnumerable.
• HandleInputMode: For all HandleTypes a corresponding ResourceKey was added as static field that can be used to register a custom IVisualTemplate for this handle type. Per default the #createVisual(IRenderContext,IHandle) method now looks up the IVisualTemplate for the ResourceKey matching the HandleType for the passed IHandle. The #updateVisual method is no longer used and was removed.
• An initially collapsed group node as a result of ICommand#GROUP_SELECTION now has a reasonable size.
• IClipboardIdProvider: Signature of method #getId(IModelItem, IGraphClipboardContext) has been changed to #getId(IGraphClipboardContext, IModelItem).
• GraphCopier: Changed signature of method #addBend(IGraph, IGraph, IEdge, IBend, int, PointD) to #addBend(IGraph, IGraph, IEdge, IBend, PointD, int).

Styles

• AbstractEdgeStyle and AbstractStripeStyle: The return type of method #clone() has been changed from AbstractEdgeStyle<TVisual> to AbstractEdgeStyle. Furthermore, the return type of methods #createVisual(IRenderContext, IEdge) and #updateVisual(IRenderContext, IVisual, IEdge) has been changed from TVisual extends IVisual to IVisual.
• IconLabelStyle:
  • The type of property #Url has been changed from String to java.net.URL.
  • The constructors have been changed and now take the URL of the icon instead of its Image.
• MemoryIconLabelStyle: Simplified constructors that now only allow to specify the image of the icon as well as a custom renderer.
• The type of ArcEdgeStyle#Renderer has been changed from IEdgeStyleRenderer to ArcEdgeStyleRenderer.
• The type of PolylineEdgeStyle#Renderer has been changed from IEdgeStyleRenderer to PolylineEdgeStyleRenderer.
• TableNodeStyle: The type of property #Renderer has been changed from INodeStyleRenderer to TableNodeStyleRenderer. Furthermore, the parameter type of methods #addPropertyChangedListener(IEventListener<PropertyChangedEventArgs>) and #removePropertyChangedListener(IEventListener<PropertyChangedEventArgs>) has been changed from IEventListener to IEventListener<PropertyChangedEventArgs>.
• The type of VoidStripeStyle#Renderer has been changed from IStripeStyleRenderer to VoidStripeStyleRenderer.

GraphML

• GraphML annotations: SerializationVisibilityType and GraphMLSerializationMode have been merged to GraphMLMemberVisibility.
• Property: The properties #Value and #OwnerInstance have been removed. The new methods getValue and setValue now take the owner instance as parameter.
• HandleSerializationEventArgs: The property #SourceType is now of type java.lang.reflect.Type instead of java.lang.Class.
• IWriteContext and IParseContext: A parameter of type Class<T> that describes the target type has been added to the #getCurrent methods.
• XamlSerializer: Signature of method #serialize(Type, IWriteContext, Object) has been changed to #serialize(IWriteContext, Object).
• IXamlNameMapper: The return type of method getName(IWriteContext, Type) has been changed from String to XmlName.
• QueryOutputHandlersEventArgs: Constructor QueryOutputHandlersEventArgs(IWriteContext, KeyScope, Map<Object, IOutputHandler>) has been changed to QueryOutputHandlersEventArgs(IWriteContext, KeyScope).
• GraphMLWriter: Return type of method #getOutputHandlers(IWriteContext, KeyScope) has been changed from Map<Object, IOutputHandler> to Iterable<IOutputHandler>.
• AbstractInputHandler: The return type of method #initializeFromKeyDefinition(IParseContext, Element) has been changed from boolean to void.

Algorithms

• The following classes have been deprecated: GraphEvent, IGraphListener, Maps.HighPerformanceIntMap and Maps.HighPerformanceDoubleMap.
• YList: The constructor YList(Collection<Object>) has been changed to YList(Collection<Iterable>). Method #remove(int) has been deprecated.
• Comparators: Method #compare(int, int) has been deprecated.
• Graph: Methods #addGraphListener(IGraphListener), #edgeObjects(), #getSource(Object), #getTarget(Object), #nodeObjects(), #removeGraphListener(IGraphListener), #firePostEvent() and #firePreEvent() have been deprecated.

Layout

• ClassicOrganicLayout: The return type of method property #PreferredEdgeLength has been changed from int to double. Note that this also induces a corresponding change in class OrganicLayoutData.
• OrganicLayout and ClassicOrganicLayout: The type of constant #PREFERRED_EDGE_LENGTH_DPKEY has been changed from EdgeDpKey<Integer> to EdgeDpKey<Double>.
• LayoutGraph: Methods #getEdgeLabelLayout(Object), #getEdgeLayout(Object), #getNodeLabelLayout(Object) and #getNodeLayout(Object) have been deprecated.
• HierarchicLayoutCore.IncrementalHint has been deprecated. Method INodeData#getIncrementalHint() now returns Object.
• LayoutGraphAdapter: The type of the provided data provider keys have been changed from Object to a more specific type.
• PartitionCellId: The return type of property #Cells has been changed from Collection<Object> to Iterable<Cell>.
• HierarchicLayout:
  • The edge grouping now supports to group incoming and outgoing edges of a node. In previous versions incoming and outgoing edges always defined separate groups even though the user specified the same group IDs for such edges.
  • Method #isIntegratedEdgeLabelingEnabled does now always return false if the labeling algorithm is disabled (see MultiStageLayout#isLabelingEnabled. In previous versions it was only required that an appropriate labeling algorithm was specified, but it was not necessary that it is enabled. Therefore, the integrated labeling state queried from the property might not have corresponded to what the layout algorithm actually did. The same behavior change applies for the following methods:
    • HierarchicLayout#isNodeLabelConsiderationEnabled
    • OrthogonalLayout#isIntegratedEdgeLabelingEnabled
    • OrthogonalLayout#isNodeLabelConsiderationEnabled
  • HierarchicLayout may now place source/target labels in layers that contain common nodes. In previous versions such labels were always placed in separate layers which often led to less compact drawings with superfluous bends.
  • Geometry information registered with data providers with keys #ALTERNATIVE_GROUP_BOUNDS_DP_KEY and #ALTERNATIVE_EDGE_PATH_DP_KEY is now automatically rotated according to the specified layout orientation. This fixes unstable from-sketch behavior in incremental layout mode when using an orientation other than top-to-bottom. User that
• OrganicLayout does no longer resize empty group nodes, possible ignoring a minimum group node size for them (see GroupingKeys#MINIMUM_NODE_SIZE_DPKEY). The behavior with respect to empty group nodes is now in line with the behavior of other common layout algorithms.
• Method Centrality#closenessCentrality now sets the closeness of a node to Infinity if the sum of the shortest path distances is 0. Before, it was set to NaN in such cases.
• Groups.Dendrogram does no longer extend class Graph. To enable convenient iteration of a dendrogram, method #getChildren(Node) was added.
• SingleCycleLayout: Property #NodeSequencer now allows to specify null to return to the default sequencer. In previous versions, specifying null leads to an IllegalStateException.

Demo Improvements

• The package structure of the source code demos has been changed to a more intuitive structure.
• The Viewer distribution now provides several source code demos.
• The layout code in the BPMN demo was simplified and is now easier to adjust
• A new demo application that shows how to configure hierarchic layout for arranging Sankey diagrams was added.
• The new GraphMLCompatibilityDemo that shows how to load GraphML files created by yFiles for Java 3.0.x was added.

Improvements

Demos

• BPMNEditorDemo: The class BpmnLayoutData was added and is now used instead of the BpmnLayoutConfigurator.
• BPMNEditorDemo: Fixed the initialization of snapping and of the default group node style.
• LayoutStylesDemo: The bound restrictions of the Organic layout can now be specified explicitly.
• LayoutStylesDemo: Fixed the configuration for the minimum node distance of the Organic layout that was not editable before.

Bugfixes

Viewer

• Folding: Fixed a bug in the folding mechanism that could lead to an endless loop when loading a GraphML file containing FoldingEdgeState information.
• PathBasedEdgeStyleRenderer: Fixed bug that could leave visual artifacts when switching to an arrow that returned a null visual.
• CanvasComponent: Fixed a bug in the mouse wheel scroll behavior that moved the viewport in the wrong direction when scrolling page-wise vertically.

Layout

• Fixed java.lang.IllegalArgumentException: Comparison method violates its general contract! problems caused by calling java.util.Arrays.sort for java.util.Comparator implementations that do not imply a total order.
• HierarchicLayout: Fixed bug that caused a violation of the minimum first/last segment length for reversed/backloop edges which connect to group nodes.
• HierarchicLayout: Fixed rare bug that may cause overlaps between labels and segments of edges with octilinear routes.
• HierarchicLayout: Fixed possible infinite loop if there are critical edges (see CRITICAL_EDGE_DP_KEY).
• TreeLayout: Fixed possible group node overlaps in conjunction with some node placers, for example AssistantNodePlacer.
• TreeLayout: Fixed bug that caused less compact layout results when using node halos (see NodeHalo).
• OrganicLayout: The type of the dataprovider key GROUP_NODE_MODE_DPKEY was fixed from NodeDpKey<Object> to NodeDpKey<GroupNodeMode>.
• OrganicLayoutData: The type of the property GroupNodeModes was fixed from ItemMapping<Node, GroupNodeMode> to ItemMapping<INode, GroupNodeMode>.

Bugfixes

Viewer

• Folding: when using a MergingFoldingEdgeConverter the FoldingEdgeState representing multiple edges could become inconsistent after removing or reconnecting some of the edges.
• Path Cropping: fixed a certain case where inaccurate numeric results with ports on node shape outlines would result in the first or last edge segment being completely removed.
• DefaultEdgePathCropper: fixed an issue where getIntersection would not be called when cropping an edge at the source end.
• IInputModeContext: fixed a bug in getGraph that could cause a stack overflow.
• Edge Creation: fixed bug that could cause a 'Node not in this graph' exception during interactive edge creation.
• PopupMenuInputMode: moved the default popup menu location one pixel to the right and one pixel down to prevent the mouse cursor from being positioned directly on the popup menu's border. (Mouse clicks on the popup menu's border do neither close the popup menu nor trigger any of the popup menu's entries.)

Layout

• HierarchicLayout: fixed rare NullPointerException triggered in AsIsSequencer for edges incident to group nodes that have a sketch without bend points as well as port constraints.
• HierarchicLayout: fixed bug that may cause non-orthogonal segments of grouped edges even though orthogonal edge routing is enabled.
• HierarchicLayout: improved compactness of layouts that feature group nodes with insets and (group) nodes with halos (NodeHalo). Previously, the specification of halos could enlarge the insets of group nodes by an unnecessary large amount.
• HierarchicLayout: fixed an exception that sometimes got triggered when sequence constraints were used.
• PartialLayout: fixed NullPointerException that appeared if no DataProvider with key PARTIAL_NODES_DP_KEY is registered with the input graph.

Improvements

Documentation

• The Developer's Guide has been completely revised. Now it consists of two parts: The first part covers the basics of yFiles for Java, while the second part describes in detail how the behavior of the library can be adapted to the customer's requirements.

Viewer

• Events defined on DropInputMode now carry additional event arguments DropTargetEventArgs which hold the original Java Swing drag and drop events.

Bugfixes

Viewer

• Fixed shortcut Ctrl+O for the command to open a document.
• Methods GraphMLIOHandler.addRegistryOutputMapper(String,Object) and addRegistryOutputMapper(String, String, Object, IEventListener) wrongly created multiple GraphML key definitions for the same mapper instance.
• Some GraphML annotations have been added to properties of label models and enums to increase the cross-product compatibility of generated GraphML files. The following properties have been annotated:
  • SmartEdgeLabelModel.AutoRotationEnabled is now annotated AutoRotation
  • HorizontalAlignment's CENTER, LEFT and RIGHT values are now annotated Center, Left and Right
  • TextTrimming's NONE, CHARACTER_ELLIPSIS and WORD_ELLIPSIS values are now annotated None, CharacterEllipsis and WordEllipsis
  • TextWrapping's WRAP_WITH_OVERFLOW, NO_WRAP and WRAP values are now annotated WrapWithOverflow, NoWrap and Wrap
  • EdgePathLabelModel.AutoRotationEnabled is now annotated AutoRotation
  • EdgeSegmentLabelModel.AutoRotationEnabled is now annotated AutoRotation
  • FreeEdgeLabelModel.RelativeAngleEnabled is now annotated EdgeRelativeAngle
  • AbstractJComponentLabelStyle.AutoFlippingEnabled is now annotated AutoFlip
  • ArcEdgeStyle.FixedHeightEnabled is now annotated FixedHeight
  • HtmlLabelStyle.AutoFlippingEnabled is now annotated AutoFlip
  • NodeStyleLabelStyleAdapter.AutoFlippingEnabled is now annotated AutoFlip
• The default value for GraphML serialization of PanelNodeStyle.Color is now Black.

Layout

• HierarchicLayout: Fixed NullPointerException that could happen in AsIsSequencer when incremental group hints are defined (see IncrementalHintsFactory.createIncrementalGroupHint) along with specific port constraints on edges incident to an incremental group node.
• HierarchicLayout: Improved result if compact label placement is enabled (which is the default), see SimplexNodePlacer.LabelCompaction. In previous versions the labels may have been placed in a stacked style even if this did not make the result more compact (e.g. if all labels are placed to the right of the edges).
• GraphPartitionManager: Fixed functionality to hide edges when using methods GraphPartitionManager.hide. Previously, edges were actually not hidden from the graph.
• HierarchicLayout: Fixed distance between vertical (in a top-to-bottom layout) segments of same layer edges that connect to group nodes. This also applies to self-loops that connect to the top or bottom of a group node with both ends as well as same layer parts of other edges like back-loops.
• HierarchicLayout: Fixed bug that caused the minimum edge-to-edge distance to be violated by edges with strong port constraints that cross each other.

Demos

• BPMNEditorDemo: Fixed positioning of the dynamic substate button of activity and choreography nodes.
• Fixed invalid HTML structure of demo readmes.

Demos and Tutorials

• Added new demo layout.LayoutStylesDemo that presents all major layout algorithms in an easily explorable and configurable manner.
• Added new demo viewer.svgimageexport.SVGImageExportDemo that shows how to export the contents of a GraphComponent to SVG.
• Added new demo viewer.pdfimageexport.PDFImageExportDemo that shows how to export the contents of a GraphComponent to PDF, EPS and EMF.
• Added new demo viewer.svgnodestyle.SVGNodeStyleDemo that shows how to use SVG for node visualization.
• Added new demo bpmn.editor.BPMNEditorDemo with corresponding graph element styles and a customized layout algorithm that demonstrates how to use yFiles for BPMN applications
• GraphViewerDemo: Shift click on a node in the movie graph opens now a related link in the default browser (as already stated by the graph's description).

Improvements

Viewer

• CanvasComponent: Added an event FitContentViewMarginsChanged that gets invoked when the propery #FitContentViewMargins has been changed.

Documentation Viewer

• Method parameters are shown in search results and quick navigation popups.
• Default properties are listed in a separate member section.
• The documentation viewer can be used offline by running bower install and opening index-offline.html.
• Fixed links to package documentation pages.

Bugfixes

Viewer

• Property CanvasComponent#FitContentViewMargins is now initialized to (10,10,10,10) as mentioned in its documentation.
• The SerializationVisibility annotation as well as the SerializationVisibilityType enum that are used to customize the serialization behavior of properties are now public to work properly.
• Renaming FlagsEnum members with GraphML annotations did not work.
• CollapsibleNodeStyleDecorator didn't handle the hit testing correctly when different button sizes for the collapsed and expanded state were used.
• NodeStyleLabelStyleAdapter sometimes produced a NullPointerException during rendering.
• NodeStylePortStyleAdapter didn't work well together with AbstractComponentNodeStyle as inner style.
• The AutoCleanupEnabled property of PortDefaults wasn't serialized correctly as 'AutoCleanup' due to a missing GraphML rename.
• Port location model parameters created with GenericPortLocationModel weren't serialized correctly.
• ITable#setStyle(ILabel, ILabelStyle) and ITable#setLabelModelParameter ignored the provided style resp. label model parameter.

Layout

• SeriesParallelLayout: Fixed possible NullPointerException when handling graphs with group nodes.
• ParallelEdgeLayout: Fixed bug that caused wrong edge port coordinates.
• SeriesParallelLayout: Fixed violations of the minimum first and last segment length and self-crossings of octilinear edges.
• SeriesParallelLayout: Fixed bug that caused node-to-node or node-to-edge overlaps in the case where the graph contained group nodes and node/edge labels.
• HierarchicLayout: Fixed bug that caused critical edges to not be aligned (see CRITICAL_EDGE_PRIORITY_DPKEY).
• BusRouter: Fixed rare IllegalStateException caused by non-orthogonal edge segments.
• TreeLayout: Fixed bug that occurs when edges with single port constraints are reversed during the layout.
• Polyline.EdgeRouter: Fixed possible NullPointerException that may appear if a specified PortCandidate has multiple directions.
• OrganicLayout: Fixed a bug that may occur when using OrganicLayout with RecursiveGroupLayout and LayoutMultiplexer.

Incompatible Changes

Changes in Default Behavior

Viewer

• FlagsEnum members now respect GraphML annotations for renaming. Such members can't be read back in prior versions of the library. Reading older files with the current version still works.

This is the initial release of the 3.0 series that brings a modernized API, many new or improved library features and support for current Java language features.

Please see the Developer's Guide for migration instructions from yFiles for Java 2.x