Java Doc for SimpleCanvasManager.java in  » 6.0-JDK-Modules » j2me » com » sun » perseus » model » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » com.sun.perseus.model 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   com.sun.perseus.model.SimpleCanvasManager

All known Subclasses:   com.sun.perseus.model.CanvasManager,
SimpleCanvasManager
public class SimpleCanvasManager implements UpdateListener,RunnableHandler(Code)

The SimpleCanvasManager class is responsible for keeping the rendering of a ModelNode tree on a RenderGraphics current.

Specifically, the SimpleCanvasManager listens to update events in a ModelNode tree and triggers repaint into the RenderGraphics when necessary.

The SimpleCanvasManager does not handle documents that have not been loaded and does nothing on loadComplete calls.


version:
   $Id: SimpleCanvasManager.java,v 1.15 2006/06/29 10:47:34 ln156897 Exp $


Field Summary
protected  booleancanvasConsumed
     This flag should be used by the consumer of the offscreen buffer to let the SimpleCanvasManager know when the updated offscreen has been consumed.
protected  CanvasUpdateListenercanvasUpdateListener
    
protected  RGBclearPaint
     The color used to clear the canvas.
protected  DirtyAreaManagerdirtyAreaManager
     Dirty area manager.
protected  DocumentNodedocumentNode
    
protected  booleanisOff
     When off, no updates are made to the rendering surface.
final public  Objectlock
     The object used as a lock to synchronize access to the paint surface.
protected  booleanneedRepaint
    
protected  RenderGraphicsrg
     The RenderGraphics which this SimpleCanvasManager keeps up to date with its associated model changes.

Constructor Summary
public  SimpleCanvasManager(RenderGraphics rg, DocumentNode documentNode, CanvasUpdateListener canvasUpdateListener)
    

Method Summary
public  voidconsume()
     Should be called by the SimpleCanvasManager user to notify the SimpleCanvasManager when an update to the canvas has been consumed.
protected  voidfullPaint()
     Utility method used to do a full repaint.
public  RenderGraphicsgetRenderGraphics()
    
public  booleanisOff()
    
public  voidloadBegun(ModelNode node)
    
public  voidloadComplete(ModelNode node)
     Invoked when the input node has finished loading.
public  voidloadStarting(DocumentNode documentNode, InputStream is)
    
public  voidloadingFailed(DocumentNode documentNode, Exception error)
     Invoked when a document error happened before finishing loading.
public  voidmodifiedNode(ModelNode node)
     Invoked when a node modification completed.
public  voidmodifyingNode(ModelNode node)
     Invoked when a node is about to be modified.
public  voidmodifyingNodeRendering(ModelNode node)
    
public  voidnodeInserted(ModelNode node)
    
public  voidrunnableInvoked(RunnableQueue rq, Runnable r)
     Called when the given Runnable has just been invoked and has returned.
public  voidsetClearPaint(RGB clearPaint)
     Sets the paint used to clear the canvas.
public  voidsetRenderGraphics(RenderGraphics rg)
    
Parameters:
  rg - the RenderGraphics which this instance should now update.
public  voidtextInserted(ModelNode node)
     Invoked when a string has been appended, during a load phase.
public  voidturnOff()
     Turns off any rendering updates.
public  voidturnOn()
     Turns rendering updates on.
public  voidupdateCanvas()
     Utility method used to update the canvas appropriately depending on what is needed.

Field Detail
canvasConsumed
protected boolean canvasConsumed(Code)
This flag should be used by the consumer of the offscreen buffer to let the SimpleCanvasManager know when the updated offscreen has been consumed.



canvasUpdateListener
protected CanvasUpdateListener canvasUpdateListener(Code)
Listens to canvas updates



clearPaint
protected RGB clearPaint(Code)
The color used to clear the canvas.



dirtyAreaManager
protected DirtyAreaManager dirtyAreaManager(Code)
Dirty area manager. May be null.



documentNode
protected DocumentNode documentNode(Code)
Model which this SimpleCanvasManager renders to the associated RenderGraphics



isOff
protected boolean isOff(Code)
When off, no updates are made to the rendering surface.



lock
final public Object lock(Code)
The object used as a lock to synchronize access to the paint surface.



needRepaint
protected boolean needRepaint(Code)
Controls whether a repaint is needed or not



rg
protected RenderGraphics rg(Code)
The RenderGraphics which this SimpleCanvasManager keeps up to date with its associated model changes.




Constructor Detail
SimpleCanvasManager
public SimpleCanvasManager(RenderGraphics rg, DocumentNode documentNode, CanvasUpdateListener canvasUpdateListener)(Code)

Parameters:
  rg - the RenderGraphics which this instance will keep up to date with the model changes.
Parameters:
  documentNode - the DocumentNode, root of the tree that this SimpleCanvasManager willdraw and keep current on the RenderGraphics
Parameters:
  canvasUpdateListener - the CanvasUpdateListenerwhich listens to completed updates on the associatedRenderGraphics
throws:
  IllegalArgumentException - if rg, documentNode or listener is null.




Method Detail
consume
public void consume()(Code)
Should be called by the SimpleCanvasManager user to notify the SimpleCanvasManager when an update to the canvas has been consumed.



fullPaint
protected void fullPaint()(Code)
Utility method used to do a full repaint. This method should be called from the update thread only.



getRenderGraphics
public RenderGraphics getRenderGraphics()(Code)
the RenderGraphics to the canvas managed by this SimpleCanvasManager.



isOff
public boolean isOff()(Code)
true if the SimpleCanvasManager is currently bypassing canvasupdates.



loadBegun
public void loadBegun(ModelNode node)(Code)
Invoked when the input node has started loading
Parameters:
  node - the ModelNode for which loadinghas started.



loadComplete
public void loadComplete(ModelNode node)(Code)
Invoked when the input node has finished loading.
Parameters:
  node - the node for which loadingis complete.



loadStarting
public void loadStarting(DocumentNode documentNode, InputStream is)(Code)
Invoked when the document starts loading
Parameters:
  documentNode - the DocumentNode for which loadingis starting
Parameters:
  is - the InputStream from which SVG contentis loaded.



loadingFailed
public void loadingFailed(DocumentNode documentNode, Exception error)(Code)
Invoked when a document error happened before finishing loading.
Parameters:
  documentNode - the DocumentNode for which loadinghas failed.
Parameters:
  error - the exception which describes the reason why loadingfailed.



modifiedNode
public void modifiedNode(ModelNode node)(Code)
Invoked when a node modification completed.
Parameters:
  node - the node which was just modified.



modifyingNode
public void modifyingNode(ModelNode node)(Code)
Invoked when a node is about to be modified. This will be used in the future to track dirty areas.
Parameters:
  node - the node which is about to be modified



modifyingNodeRendering
public void modifyingNodeRendering(ModelNode node)(Code)
Invoked when a node's rendering is about to be modified
Parameters:
  node - the node which is about to be modified



nodeInserted
public void nodeInserted(ModelNode node)(Code)
Invoked when a node has been inserted into the tree
Parameters:
  node - the newly inserted node



runnableInvoked
public void runnableInvoked(RunnableQueue rq, Runnable r)(Code)
Called when the given Runnable has just been invoked and has returned.
Parameters:
  r - the Runnable which just got executed
Parameters:
  rq - the RunnableQueue which executed theinput Runnable



setClearPaint
public void setClearPaint(RGB clearPaint)(Code)
Sets the paint used to clear the canvas.
Parameters:
  clearPaint - the new paint.



setRenderGraphics
public void setRenderGraphics(RenderGraphics rg)(Code)

Parameters:
  rg - the RenderGraphics which this instance should now update. Setting the RenderGraphics causes a full repaintto be scheduled.
throws:
  IllegalArgumentException - if rg is null.



textInserted
public void textInserted(ModelNode node)(Code)
Invoked when a string has been appended, during a load phase. This is only used when parsing a document and is used in support of progressive download, like the other loadXXX methods.
Parameters:
  node - the ModelNode on which text has beeninserted.



turnOff
public void turnOff()(Code)
Turns off any rendering updates.



turnOn
public void turnOn()(Code)
Turns rendering updates on.



updateCanvas
public void updateCanvas()(Code)
Utility method used to update the canvas appropriately depending on what is needed. During the loading phase, while we do progressive rendering, the canvas will only redraw nodes in the progressiveNodes list, unless a repaint has been requested. Important Note: this method should only be called from the update thread, i.e., the thread that also manages the model node tree.



Methods inherited from java.lang.Object
public boolean equals(Object obj)(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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