y.view
Class ViewControl

java.lang.Object
  y.view.ViewControl

All Implemented Interfaces:

ViewChangeListener

public class ViewControl
extends Object
implements ViewChangeListener

This class manages the ViewModes on a collection of views. There is always one active View. There is one active Mode for this active View. If a the active View is changed, then the active ViewMode Is transfered to this view.

The active Mode can be changed in two ways:

• Setting a new Mode
• Pushing a new Mode

Field Summary

protected ViewContainer

vc

Constructor Summary

ViewControl()
Creates a new ViewControl

ViewControl(ViewContainer vc)
Creates a new ViewControl for a given ViewContainer.

Method Summary

protected static void	activateMode(Graph2DView v, ViewMode vl) Convenience methods
void	add(ViewMode mode) Registers a mode in this control.
void	addPropertyChangeListener(PropertyChangeListener pcl) Adds a property change listener to this class.
void	currentViewChanged(View v) Current View of the ViewContainer has changed, so transfer the current mode to the new current view
protected static void	deactivateMode(Graph2DView v, ViewMode vl) Convenience methods
void	dropViewContainer() Remove the ViewControl from the ViewContainer.
ViewMode	getCurrentMode() Returns the currently activated mode of this view control.
YCursor	getModes()
ViewContainer	getViewContainer() Get the ViewContainer of this ViewControl
void	popMode() Makes the the mode on the top of the stack active
void	pushMode(ViewMode l) Pushes the current mode on the top of the Stack and activates a new mode
void	remove(ViewMode mode) Removes this mode from this control.
void	setMode(ViewMode viewMode) Sets a new active view mode.
protected void	setToCurrent(ViewMode viewMode) Sets the given view mode as current view mode.
void	setViewContainer(ViewContainer vc) Set the ViewContainer on which this ViewControl works.

Methods inherited from class java.lang.Object

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

Field Detail

vc

protected ViewContainer vc

Constructor Detail

ViewControl

public ViewControl()

Creates a new ViewControl

ViewControl

public ViewControl(ViewContainer vc)

Creates a new ViewControl for a given ViewContainer.

Parameters:

vc - The collection of views which should be controlled

Method Detail

getViewContainer

public ViewContainer getViewContainer()

Get the ViewContainer of this ViewControl

Returns:

The ViewContainer on which this instance works, null if no one is specified.

setViewContainer

public void setViewContainer(ViewContainer vc)

Set the ViewContainer on which this ViewControl works.

Parameters:

vc - A ViewContainer

dropViewContainer

public void dropViewContainer()

Remove the ViewControl from the ViewContainer.

popMode

public void popMode()

Makes the the mode on the top of the stack active

pushMode

public void pushMode(ViewMode l)

Pushes the current mode on the top of the Stack and activates a new mode

Parameters:

l - The mode which should be activated

setMode

public void setMode(ViewMode viewMode)

Sets a new active view mode. Also, this operation clears the stack of formerly pushed modes.

Parameters:

viewMode - a view mode which replaces the current active mode.

setToCurrent

protected void setToCurrent(ViewMode viewMode)

Sets the given view mode as current view mode.

Parameters:

viewMode - The mode which will become the new current mode

getCurrentMode

public ViewMode getCurrentMode()

Returns the currently activated mode of this view control.

add

public void add(ViewMode mode)

Registers a mode in this control.

remove

public void remove(ViewMode mode)

Removes this mode from this control.

getModes

public YCursor getModes()

currentViewChanged

public void currentViewChanged(View v)

Current View of the ViewContainer has changed, so transfer the current mode to the new current view

Specified by:

currentViewChanged in interface ViewChangeListener

Parameters:

v - the new view

activateMode

protected static void activateMode(Graph2DView v,
                                   ViewMode vl)

Convenience methods

deactivateMode

protected static void deactivateMode(Graph2DView v,
                                     ViewMode vl)

Convenience methods

addPropertyChangeListener

public void addPropertyChangeListener(PropertyChangeListener pcl)

Adds a property change listener to this class. Listeners will be informed when the current view mode of this control changes.