Eclipse GEF and Draw2d Plug-in Developer Guide (Galileo) - NativeGraphicsSource (Eclipse Draw2d API Specification)

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Eclipse Draw2d
3.3

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org.eclipse.draw2d
Class NativeGraphicsSource

java.lang.Object
  
org.eclipse.draw2d.NativeGraphicsSource

All Implemented Interfaces:: GraphicsSource

public final class NativeGraphicsSource
extends java.lang.Object
implements GraphicsSource

A graphics source that posts a paint request to the control rather than constructing GC on it directly. This allows the OS's native painting mechanism to be used directly, including any double-buffering that the OS may provide for free.

Since:: 3.2

Constructor Summary

NativeGraphicsSource (Control canvas)
          Constructs a new graphics source on the given control.

Method Summary

void flushGraphics ( Rectangle region)
          Does nothing.

Graphics getGraphics ( Rectangle r)
          Always returns null, because

Methods inherited from class java.lang.Object

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

Constructor Detail

NativeGraphicsSource

public NativeGraphicsSource(Control canvas)

Constructs a new graphics source on the given control.
Parameters:: canvas - the control
Since:: 3.2

Method Detail

getGraphics

public 
Graphics getGraphics(
Rectangle r)

Always returns null, because

Specified by:: getGraphics in interface GraphicsSource

Parameters:: r - The rectangular region
Returns:: A new Graphics object for the given region
See Also:: GraphicsSource.getGraphics(Rectangle)

flushGraphics

public void flushGraphics(
Rectangle region)

Does nothing.

Specified by:: flushGraphics in interface GraphicsSource

Parameters:: region - The rectangular region that that no longer needs the Graphics
See Also:: GraphicsSource.flushGraphics(Rectangle)