bundles/org.simantics.g2d/src/org/simantics/g2d/participant/KeyUtil.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 /*\r
  13  *\r
  14  * @author Toni Kalajainen\r
  15  */\r
  16 package org.simantics.g2d.participant;\r
  17 \r
  18 import java.util.HashSet;\r
  19 import java.util.Set;\r
  20 \r
  21 import org.simantics.g2d.canvas.impl.AbstractCanvasParticipant;\r
  22 import org.simantics.scenegraph.g2d.events.KeyEvent;\r
  23 import org.simantics.scenegraph.g2d.events.EventHandlerReflection.EventHandler;\r
  24 import org.simantics.scenegraph.g2d.events.KeyEvent.KeyPressedEvent;\r
  25 import org.simantics.scenegraph.g2d.events.KeyEvent.KeyReleasedEvent;\r
  26 \r
  27 \r
  28 /**\r
  29  * KeyStatus monitors statuses of keys.\r
  30  * @see java.awt.event.KeyEvent\r
  31  */\r
  32 public class KeyUtil extends AbstractCanvasParticipant {        \r
  33         \r
  34         /** Key info */\r
  35     private Set<Integer> pressedByKeyCode = new HashSet<Integer>();\r
  36     private Set<Character> pressedByChar = new HashSet<Character>();\r
  37         \r
  38     @EventHandler(priority = Integer.MAX_VALUE)\r
  39     public boolean handleClick(KeyEvent e) {\r
  40         if (e instanceof KeyPressedEvent) {\r
  41             pressedByKeyCode.add(e.keyCode);\r
  42             pressedByChar.add(e.character);\r
  43         } else\r
  44         if (e instanceof KeyReleasedEvent) {\r
  45             pressedByKeyCode.remove(e.keyCode);\r
  46             pressedByChar.remove(e.character);\r
  47         }\r
  48         return false;\r
  49     }\r
  50     \r
  51     public boolean isCharPressed(char c)\r
  52     {\r
  53         return pressedByChar.contains(c);\r
  54     }\r
  55     \r
  56     /**\r
  57      * See awt key event \r
  58      * @see java.awt.event.KeyEvent\r
  59      * @param keyCode\r
  60      * @return\r
  61      */\r
  62     public boolean isKeyPressed(int keyCode)\r
  63     {\r
  64         return pressedByKeyCode.contains(keyCode);\r
  65     }\r
  66 \r
  67 }\r