org.apache.batik.gvt.renderer

Interface Renderer

public interface Renderer

Interface for GVT Renderers.
Method Summary
voiddispose()
Cause the renderer to ask to be removed from external reference lists, de-register as a listener to events, etc.
AffineTransformgetTransform()
Returns a copy of the transform from the current user space (as defined by the top node of the GVT tree) to the device space (1 unit = 1/72nd of an inch / 1 pixel, roughly speaking
GraphicsNodegetTree()
Returns the GVT tree associated with this renderer
booleanisDoubleBuffered()
Returns true if the Renderer is currently doubleBuffering is rendering requests.
voidrepaint(Shape area)
Repaints the associated GVT tree at least under area.
voidrepaint(RectListManager areas)
Repaints the associated GVT tree at least in areas under the list of areas.
voidsetDoubleBuffered(boolean isDoubleBuffered)
Turns on/off double buffering in renderer.
voidsetTransform(AffineTransform usr2dev)
Sets the transform from the current user space (as defined by the top node of the GVT tree, to the associated device space.
voidsetTree(GraphicsNode treeRoot)
This associates the given GVT Tree with this renderer.

Method Detail

dispose

public void dispose()
Cause the renderer to ask to be removed from external reference lists, de-register as a listener to events, etc. This is so that in the absence of other existing references, it can be removed by the garbage collector.

getTransform

public AffineTransform getTransform()
Returns a copy of the transform from the current user space (as defined by the top node of the GVT tree) to the device space (1 unit = 1/72nd of an inch / 1 pixel, roughly speaking

getTree

public GraphicsNode getTree()
Returns the GVT tree associated with this renderer

isDoubleBuffered

public boolean isDoubleBuffered()
Returns true if the Renderer is currently doubleBuffering is rendering requests. If it is then getOffscreen will only return completed renderings (or null if nothing is available).

repaint

public void repaint(Shape area)
Repaints the associated GVT tree at least under area.

Parameters: area the region to be repainted, in the current user space coordinate system.

repaint

public void repaint(RectListManager areas)
Repaints the associated GVT tree at least in areas under the list of areas.

Parameters: areas a List of regions to be repainted, in the current user space coordinate system.

setDoubleBuffered

public void setDoubleBuffered(boolean isDoubleBuffered)
Turns on/off double buffering in renderer. Turning off double buffering makes it possible to see the ongoing results of a render operation.

setTransform

public void setTransform(AffineTransform usr2dev)
Sets the transform from the current user space (as defined by the top node of the GVT tree, to the associated device space.

setTree

public void setTree(GraphicsNode treeRoot)
This associates the given GVT Tree with this renderer. Any previous tree association is forgotten. Not certain if this should be just GraphicsNode, or CanvasGraphicsNode.
Copyright B) 2007 Apache Software Foundation. All Rights Reserved.