bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/events/MouseEventCoalescer.java

   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
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.scenegraph.g2d.events;\r
  13 \r
  14 import org.simantics.scenegraph.g2d.events.IEventQueue.EventCoalescer;\r
  15 import org.simantics.scenegraph.g2d.events.MouseEvent.MouseMovedEvent;\r
  16 \r
  17 /**\r
  18  * Coalescales mouse events\r
  19  * \r
  20  * @author Toni Kalajainen\r
  21  */\r
  22 public class MouseEventCoalescer implements EventCoalescer {\r
  23 \r
  24     public static final MouseEventCoalescer INSTANCE = new MouseEventCoalescer();\r
  25 \r
  26     @Override\r
  27     public Event coalesce(Event apriori, Event aposterior) {\r
  28         if (!(apriori instanceof MouseMovedEvent)) return null;\r
  29         if (!(aposterior instanceof MouseMovedEvent)) return null;\r
  30         MouseMovedEvent m1 = (MouseMovedEvent) apriori;\r
  31         MouseMovedEvent m2 = (MouseMovedEvent) aposterior;\r
  32         if (m1.mouseId!=m2.mouseId) return null;\r
  33         return aposterior;\r
  34     }\r
  35 \r
  36 }\r