1 /*******************************************************************************
2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
4 * All rights reserved. This program and the accompanying materials
5 * are made available under the terms of the Eclipse Public License v1.0
6 * which accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
14 * @author Toni Kalajainen
16 package org.simantics.scenegraph.g2d.events;
19 * @author Toni Kalajainen
21 public interface IEventHandler {
24 * Returns a bit mask based on the constants in {@link EventTypes} to
25 * restrict which type of events should be propagated to this event handler.
26 * The value returned by this method must be constant, it must not change
27 * during the handler's life cycle.
29 * @return a bit mask defining the events to propagate to this handler
35 * Process an event. If this method returns true, the event will be eaten
36 * and not sent to lower levels of the handler stack.
38 * @return true if the handler consumed the event. Consumed events are not
41 boolean handleEvent(Event e);