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