org.eclipse.draw2d
Class NativeGraphicsSource

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

All Implemented Interfaces:

GraphicsSource

public final class NativeGraphicsSource
extends 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)