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java.lang.Objectorg.apache.batik.gvt.event.GraphicsNodeChangeAdapter
org.apache.batik.gvt.UpdateTracker
public class UpdateTracker
This class tracks the changes on a GVT tree
Field Summary | |
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protected static java.awt.geom.Rectangle2D |
NULL_RECT
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Constructor Summary | |
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UpdateTracker()
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Method Summary | |
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void |
changeStarted(GraphicsNodeChangeEvent gnce)
Receives 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)
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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 |
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changeCompleted |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected static java.awt.geom.Rectangle2D NULL_RECT
Constructor Detail |
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public UpdateTracker()
Method Detail |
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public boolean hasChanged()
public java.util.List getDirtyAreas()
public java.awt.geom.Rectangle2D getNodeDirtyRegion(GraphicsNode gn, java.awt.geom.AffineTransform at)
at
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gn
- Node tree to return dirty region for.at
- Affine transform to coordinate space to accumulate
dirty regions in.public java.awt.geom.Rectangle2D getNodeDirtyRegion(GraphicsNode gn)
public void changeStarted(GraphicsNodeChangeEvent gnce)
changeStarted
in interface GraphicsNodeChangeListener
changeStarted
in class GraphicsNodeChangeAdapter
gnce
- The event object describing the GraphicsNode change.public void clear()
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