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java.lang.Objectorg.apache.batik.gvt.event.GraphicsNodeChangeAdapter
org.apache.batik.gvt.UpdateTracker
This class tracks the changes on a GVT tree
Field Summary | |
protected static Rectangle2D |
NULL_RECT
|
Constructor Summary | |
UpdateTracker()
|
Method Summary | |
void |
changeStarted(GraphicsNodeChangeEvent gnce)
Recieves notification of a change to a GraphicsNode. |
void |
clear()
Clears the tracker. |
List |
getDirtyAreas()
Returns the list of dirty areas on GVT. |
Rectangle2D |
getNodeDirtyRegion(GraphicsNode gn)
|
Rectangle2D |
getNodeDirtyRegion(GraphicsNode gn,
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 |
protected static Rectangle2D NULL_RECT
Constructor Detail |
public UpdateTracker()
Method Detail |
public boolean hasChanged()
public List getDirtyAreas()
public Rectangle2D getNodeDirtyRegion(GraphicsNode gn, AffineTransform at)
at.
- Parameters:
gn
- Node tree to return dirty region for.at
- Affine transform to coordinate space to accumulate
dirty regions in.
public 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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