y.layout.organic
Class EllipticalGroupBoundsCalculator

java.lang.Object
  y.layout.grouping.InsetsGroupBoundsCalculator
      y.layout.grouping.MinimumSizeGroupBoundsCalculator
          y.layout.organic.EllipticalGroupBoundsCalculator

All Implemented Interfaces:

GroupBoundsCalculator

public class EllipticalGroupBoundsCalculator
extends MinimumSizeGroupBoundsCalculator

An implementation of a GroupBoundsCalculator that assumes that the group node has an elliptical shape. It will calculate the size of the group node so that the containing nodes will be contained in the ellipse defined by the node bounds. This class also supports non-rectangular nodes as the children of the group nodes and will calculate the size according to their shape.

See Also:

EllipticalGroupBoundsCalculator.ShapePointProvider, SHAPE_POINT_PROVIDER_DPKEY

Nested Class Summary

static class	EllipticalGroupBoundsCalculator.EllipticalShapePointProvider A simple default implementation of EllipticalGroupBoundsCalculator.ShapePointProvider that assumes elliptical node shapes.
static interface	EllipticalGroupBoundsCalculator.ShapePointProvider Interface that can be used to query the points that lie on the convex hull of the visual shape of the nodes in the graph.

Field Summary

static Object

SHAPE_POINT_PROVIDER_DPKEY DataProvider-key used for associating EllipticalGroupBoundsCalculator.ShapePointProvider instances with the nodes in the graph.

Constructor Summary

EllipticalGroupBoundsCalculator()

Method Summary

Rectangle2D

calculateBounds(LayoutGraph graph, Node groupNode, NodeList children) This method is called during the layout process.

Methods inherited from class y.layout.grouping.MinimumSizeGroupBoundsCalculator

getDefaultMinimumNodeSize, getMinimumNodeSizeDPKey, getXAlignment, getYAlignment, setDefaultMinimumNodeSize, setMinimumNodeSizeDPKey, setXAlignment, setYAlignment

Methods inherited from class y.layout.grouping.InsetsGroupBoundsCalculator

createEnlargedBounds, getDefaultInsets, getGroupNodeInsetsDPKey, getNodeBounds, setDefaultInsets, setGroupNodeInsetsDPKey

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

SHAPE_POINT_PROVIDER_DPKEY

public static final Object SHAPE_POINT_PROVIDER_DPKEY

DataProvider-key used for associating EllipticalGroupBoundsCalculator.ShapePointProvider instances with the nodes in the graph. The algorithm will query for each node contained in a group node this interface from the dataprovider registered using this key to obtain the convex hull of the visual representation of the node.

Constructor Detail

EllipticalGroupBoundsCalculator

public EllipticalGroupBoundsCalculator()

Method Detail

calculateBounds

public Rectangle2D calculateBounds(LayoutGraph graph,
                                   Node groupNode,
                                   NodeList children)

Description copied from interface: GroupBoundsCalculator

This method is called during the layout process. It calculates the bounds for the given groupNode instance that contains the children.

Specified by:

calculateBounds in interface GroupBoundsCalculator

Overrides:

calculateBounds in class MinimumSizeGroupBoundsCalculator

Parameters:

graph - the graph instance for which the bounds will be calculated

groupNode - the group node whose bounds will be calculated

children - a list of nodes which reside inside the group node

Returns:

a Rectangle2D instance that describes the bounds of the group node.