org.eclipse.draw2d
Class UpdateManager

java.lang.Object
  |
  +--org.eclipse.draw2d.UpdateManager

Direct Known Subclasses:

DeferredUpdateManager, SubordinateUpdateManager

public abstract class UpdateManager

extends Object

Update managers handle the job of repainting and laying out figures. A desirable implementation is one that batches work to be done and collapses any redundant work. Update managers may contain 0 or more nested update managers. Some optimizations can only be performed after all requests have been batched. For this reason, an UpdateManager should call performUpdate() on its nested UpdateManagers prior to doing its own update. During the nested updates, new requests may be added.

Constructor Summary

UpdateManager()

Method Summary

abstract void	addDirtyRegion(IFigure figure, int x, int y, int w, int h) Adds the dirty region defined by the coordinates on the IFigure figure.
void	addDirtyRegion(IFigure figure, Rectangle rect)
abstract void	addInvalidFigure(IFigure figure) The receiver should call validate() on the IFigure figure in a timely fashion.
void	addUpdateListener(UpdateListener listener)
protected void	firePainting(Rectangle damage)
protected void	fireValidating()
abstract void	performUpdate()
abstract void	performUpdate(Rectangle exposed)
void	removeUpdateListener(UpdateListener listener)
abstract void	setGraphicsSource(GraphicsSource gs)
abstract void	setRoot(IFigure figure)

Methods inherited from class java.lang.Object

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

Constructor Detail

UpdateManager

public UpdateManager()

Method Detail

addDirtyRegion

public abstract void addDirtyRegion(IFigure figure,
                                    int x,
                                    int y,
                                    int w,
                                    int h)

Adds the dirty region defined by the coordinates on the IFigure figure. The update manager should repaint the dirty region in a timely fashion.

addDirtyRegion

public void addDirtyRegion(IFigure figure,
                           Rectangle rect)

addInvalidFigure

public abstract void addInvalidFigure(IFigure figure)

The receiver should call validate() on the IFigure figure in a timely fashion.

addUpdateListener

public void addUpdateListener(UpdateListener listener)

firePainting

protected void firePainting(Rectangle damage)

fireValidating

protected void fireValidating()

performUpdate

public abstract void performUpdate()

performUpdate

public abstract void performUpdate(Rectangle exposed)

removeUpdateListener

public void removeUpdateListener(UpdateListener listener)

setGraphicsSource

public abstract void setGraphicsSource(GraphicsSource gs)

setRoot

public abstract void setRoot(IFigure figure)