diva.canvas.event

Interface EventAcceptor

All Superinterfaces:

CanvasComponent

All Known Implementing Classes:

BasicCanvasPane, BasicGraphPane, BubblePane, CanvasPane, EventLayer, FigureLayer, GraphicsPane, GraphPane, PaneWrapper, SimplePane

public interface EventAcceptor
extends CanvasComponent

An event acceptor is a canvas component object that is prepared to accept an AWT event, and then possibly process and consume it. This interface is also used as a tagging interface so that event-processing routines can tell whether certain objects are smart enough to handle events for themselves.

Version:

$Id$

Author:

John Reekie

Method Summary

Modifier and Type	Method and Description
void	dispatchEvent(java.awt.AWTEvent event) Dispatch an AWT event within this component.
boolean	isEnabled() Test the enabled flag of this object.
void	setEnabled(boolean flag) Set the enabled flag of this object.

Methods inherited from interface diva.canvas.CanvasComponent

getParent, getTransformContext, repaint, repaint

Method Detail

isEnabled

boolean isEnabled()

Test the enabled flag of this object. If true, the object is prepared to handle events with processEvent().

Returns:

true if the object is prepared to handle events with processEvent()

setEnabled

void setEnabled(boolean flag)

Set the enabled flag of this object. If true, the object is prepared to handle events with processEvent().

Parameters:

flag - True if the object is prepared to handle events with processEvent();

dispatchEvent

void dispatchEvent(java.awt.AWTEvent event)

Dispatch an AWT event within this component. The implementing object should test if it is enabled first, and return if not. Otherwise, it should handle the event in whatever way it thinks appropriate.

Parameters:

event - the event.