bundles/org.simantics.g2d/src/org/simantics/g2d/participant/KeyToCommand.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.g2d.participant;\r
  13 \r
  14 import java.util.ArrayList;\r
  15 import java.util.Collection;\r
  16 import java.util.List;\r
  17 \r
  18 import org.simantics.g2d.canvas.impl.AbstractCanvasParticipant;\r
  19 import org.simantics.g2d.canvas.impl.DependencyReflection.Dependency;\r
  20 import org.simantics.scenegraph.g2d.events.KeyEvent;\r
  21 import org.simantics.scenegraph.g2d.events.EventHandlerReflection.EventHandler;\r
  22 import org.simantics.scenegraph.g2d.events.KeyEvent.KeyPressedEvent;\r
  23 import org.simantics.scenegraph.g2d.events.command.CommandEvent;\r
  24 import org.simantics.scenegraph.g2d.events.command.CommandKeyBinding;\r
  25 import org.simantics.scenegraph.g2d.events.command.Commands;\r
  26 \r
  27 /**\r
  28  * Converts key presses to commands. \r
  29  * Do not use this in eclipse environment, use XXXTODO instead which\r
  30  * converts eclipse commands into g2d commands.\r
  31  * \r
  32  * CommandKeyBinding.DEFAULT_BINDINGS\r
  33  * \r
  34  * @See {@link CommandKeyBinding} command bindings\r
  35  * @See {@link Commands} commands\r
  36  * @author Toni Kalajainen\r
  37  */\r
  38 public class KeyToCommand extends AbstractCanvasParticipant {\r
  39 \r
  40         @Dependency KeyUtil keyUtil;\r
  41         List<CommandKeyBinding> binds = new ArrayList<CommandKeyBinding>();\r
  42         \r
  43         public KeyToCommand(CommandKeyBinding... binds) {\r
  44                 assert(binds!=null);\r
  45                 for (CommandKeyBinding b : binds)\r
  46                         this.binds.add(b);\r
  47         }\r
  48         \r
  49         public KeyToCommand(Collection<CommandKeyBinding> binds) {\r
  50                 assert(binds!=null);\r
  51                 this.binds.addAll(binds);\r
  52         }\r
  53         \r
  54         public void addBinding(CommandKeyBinding binding) {\r
  55                 if (!this.binds.contains(binding))\r
  56                         this.binds.add(binding);\r
  57         }\r
  58 \r
  59         @EventHandler(priority = Integer.MIN_VALUE)\r
  60         public boolean handleKeyEvent(KeyEvent e) {\r
  61             //System.out.println("keytocommand " + e);\r
  62                 boolean pressed = (e instanceof KeyPressedEvent);\r
  63                 nextBinding:            \r
  64                 for (CommandKeyBinding ckb : binds) {\r
  65                         int keyCode = ckb.keyCode[0];\r
  66                         boolean _down = keyCode>0;\r
  67                         if (_down != pressed) continue;\r
  68                         if (!_down) keyCode = -keyCode;                 \r
  69                         if (e.keyCode != keyCode) continue;\r
  70                         for (int i=1; i<ckb.keyCode.length; i++) {\r
  71                                 int code = ckb.keyCode[i];\r
  72                                 boolean down = code>0;\r
  73                                 if (!down) code = -code;                                \r
  74                                 if (keyUtil.isKeyPressed(code) ^ down)\r
  75                                         continue nextBinding;\r
  76                         }\r
  77                         CommandEvent ce = new CommandEvent(getContext(), e.time, ckb.command);\r
  78                         getContext().getEventQueue().queueFirst(ce);\r
  79                 }\r
  80                 return false;\r
  81         }       \r
  82         \r
  83 }\r