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org.apache.batik.gvt
Class UpdateTracker  

java.lang.Object
  org.apache.batik.gvt.event.GraphicsNodeChangeAdapter
      org.apache.batik.gvt.UpdateTracker

All Implemented Interfaces:

java.util.EventListener, org.apache.batik.gvt.event.GraphicsNodeChangeListener

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public class UpdateTracker

extends org.apache.batik.gvt.event.GraphicsNodeChangeAdapter

This class tracks the changes on a GVT tree

Version:

$Id: UpdateTracker.java,v 1.24 2005/03/27 08:58:34 cam Exp $

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Nested Class Summary
(package private)  class	UpdateTracker.ChngSrcRect

 

Field Summary
(package private)  java.util.Map	dirtyNodes
(package private)  java.util.Map	fromBounds
protected static java.awt.geom.Rectangle2D	NULL_RECT

 

Constructor Summary

UpdateTracker()

 

Method Summary
void	changeStarted(org.apache.batik.gvt.event.GraphicsNodeChangeEvent gnce)           Recieves notification of a change to a GraphicsNode.
void	clear()           Clears the tracker.
java.util.List	getDirtyAreas()           Returns the list of dirty areas on GVT.
java.awt.geom.Rectangle2D	getNodeDirtyRegion(GraphicsNode gn)
java.awt.geom.Rectangle2D	getNodeDirtyRegion(GraphicsNode gn, java.awt.geom.AffineTransform at)           This returns the dirty region for gn in the coordinate system given by at.
boolean	hasChanged()           Tells whether the GVT tree has changed.

 

Methods inherited from class org.apache.batik.gvt.event.GraphicsNodeChangeAdapter

changeCompleted

 

Methods inherited from class java.lang.Object

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

 

Field Detail

dirtyNodes

java.util.Map dirtyNodes

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fromBounds

java.util.Map fromBounds

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NULL_RECT

protected static java.awt.geom.Rectangle2D NULL_RECT

Constructor Detail

UpdateTracker

public UpdateTracker()

Method Detail

hasChanged

public boolean hasChanged()

Tells whether the GVT tree has changed.

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getDirtyAreas

public java.util.List getDirtyAreas()

Returns the list of dirty areas on GVT.

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getNodeDirtyRegion

public java.awt.geom.Rectangle2D getNodeDirtyRegion(GraphicsNode gn,
                                                    java.awt.geom.AffineTransform at)

This returns the dirty region for gn in the coordinate system given by at.

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getNodeDirtyRegion

public java.awt.geom.Rectangle2D getNodeDirtyRegion(GraphicsNode gn)

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changeStarted

public void changeStarted(org.apache.batik.gvt.event.GraphicsNodeChangeEvent gnce)

Recieves notification of a change to a GraphicsNode.

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clear

public void clear()

Clears the tracker.

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