//
// Event support methods
//
public void fireGraphicsNodeChangeStarted(GraphicsNode changeSrc) {
if (changeStartedEvent == null)
changeStartedEvent = new GraphicsNodeChangeEvent
(this, GraphicsNodeChangeEvent.CHANGE_STARTED);
changeStartedEvent.setChangeSrc(changeSrc);
fireGraphicsNodeChangeStarted(changeStartedEvent);
changeStartedEvent.setChangeSrc(null);
}