bundles/org.simantics.g2d/src/org/simantics/g2d/participant/KeyToCommand.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   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
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.g2d.participant;
  13
  14 import java.util.ArrayList;
  15 import java.util.Collection;
  16 import java.util.List;
  17
  18 import org.simantics.g2d.canvas.impl.AbstractCanvasParticipant;
  19 import org.simantics.g2d.canvas.impl.DependencyReflection.Dependency;
  20 import org.simantics.scenegraph.g2d.events.KeyEvent;
  21 import org.simantics.scenegraph.g2d.events.EventHandlerReflection.EventHandler;
  22 import org.simantics.scenegraph.g2d.events.KeyEvent.KeyPressedEvent;
  23 import org.simantics.scenegraph.g2d.events.command.CommandEvent;
  24 import org.simantics.scenegraph.g2d.events.command.CommandKeyBinding;
  25 import org.simantics.scenegraph.g2d.events.command.Commands;
  26
  27 /**
  28  * Converts key presses to commands.
  29  * Do not use this in eclipse environment, use XXXTODO instead which
  30  * converts eclipse commands into g2d commands.
  31  *
  32  * CommandKeyBinding.DEFAULT_BINDINGS
  33  *
  34  * @See {@link CommandKeyBinding} command bindings
  35  * @See {@link Commands} commands
  36  * @author Toni Kalajainen
  37  */
  38 public class KeyToCommand extends AbstractCanvasParticipant {
  39
  40         @Dependency KeyUtil keyUtil;
  41         List<CommandKeyBinding> binds = new ArrayList<CommandKeyBinding>();
  42
  43         public KeyToCommand(CommandKeyBinding... binds) {
  44                 assert(binds!=null);
  45                 for (CommandKeyBinding b : binds)
  46                         this.binds.add(b);
  47         }
  48
  49         public KeyToCommand(Collection<CommandKeyBinding> binds) {
  50                 assert(binds!=null);
  51                 this.binds.addAll(binds);
  52         }
  53
  54         public void addBinding(CommandKeyBinding binding) {
  55                 if (!this.binds.contains(binding))
  56                         this.binds.add(binding);
  57         }
  58
  59         @EventHandler(priority = Integer.MIN_VALUE)
  60         public boolean handleKeyEvent(KeyEvent e) {
  61             //System.out.println("keytocommand " + e);
  62                 boolean pressed = (e instanceof KeyPressedEvent);
  63                 nextBinding:
  64                 for (CommandKeyBinding ckb : binds) {
  65                         int keyCode = ckb.keyCode[0];
  66                         boolean _down = keyCode>0;
  67                         if (_down != pressed) continue;
  68                         if (!_down) keyCode = -keyCode;
  69                         if (e.keyCode != keyCode) continue;
  70                         for (int i=1; i<ckb.keyCode.length; i++) {
  71                                 int code = ckb.keyCode[i];
  72                                 boolean down = code>0;
  73                                 if (!down) code = -code;
  74                                 if (keyUtil.isKeyPressed(code) ^ down)
  75                                         continue nextBinding;
  76                         }
  77                         CommandEvent ce = new CommandEvent(getContext(), e.time, ckb.command);
  78                         getContext().getEventQueue().queueFirst(ce);
  79                 }
  80                 return false;
  81         }
  82
  83 }