bundles/org.simantics.g2d/src/org/simantics/g2d/canvas/impl/MouseCaptureContext.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.canvas.impl;\r
  13 \r
  14 import java.lang.reflect.Method;\r
  15 import java.util.HashMap;\r
  16 import java.util.HashSet;\r
  17 import java.util.Map;\r
  18 import java.util.Set;\r
  19 \r
  20 import org.simantics.g2d.canvas.IMouseCaptureContext;\r
  21 import org.simantics.g2d.canvas.IMouseCaptureHandle;\r
  22 import org.simantics.g2d.canvas.IMouseCaptureHandleListener;\r
  23 import org.simantics.g2d.canvas.IMouseCaptureListener;\r
  24 import org.simantics.utils.threads.IThreadWorkQueue;\r
  25 import org.simantics.utils.threads.SyncListenerList;\r
  26 \r
  27 /**\r
  28  * @author Toni Kalajainen\r
  29  */\r
  30 public class MouseCaptureContext implements IMouseCaptureContext {\r
  31 \r
  32     protected Map<Integer, Set<IMouseCaptureHandle>> mouseCapture = \r
  33         new HashMap<Integer, Set<IMouseCaptureHandle>>();\r
  34     \r
  35     protected SyncListenerList<IMouseCaptureListener> mouseCaptureListeners =\r
  36         new SyncListenerList<IMouseCaptureListener>(IMouseCaptureListener.class);\r
  37     \r
  38     public void addMouseCaptureListener(IMouseCaptureListener listener) {\r
  39         mouseCaptureListeners.add(listener);\r
  40     }\r
  41     public void addMouseCaptureListener(IMouseCaptureListener listener, IThreadWorkQueue thread) {\r
  42         mouseCaptureListeners.add(thread, listener);\r
  43     }    \r
  44     public void removeMouseCaptureListener(IMouseCaptureListener listener) {\r
  45         mouseCaptureListeners.remove(listener);\r
  46     }\r
  47     public void removeMouseCaptureListener(IMouseCaptureListener listener, IThreadWorkQueue thread) {\r
  48         mouseCaptureListeners.remove(thread, listener);\r
  49     }\r
  50     \r
  51     private final static Method onMouseCaptured = SyncListenerList.getMethod(IMouseCaptureListener.class, "onMouseCaptured");\r
  52     private final static Method onMouseReleased = SyncListenerList.getMethod(IMouseCaptureListener.class, "onMouseReleased");\r
  53     protected void fireMouseCaptured(int mouseId) {\r
  54         mouseCaptureListeners.fireEventSync(onMouseCaptured, this, mouseId);\r
  55     }\r
  56     protected void fireAsyncMouseCaptured(int mouseId) {\r
  57         mouseCaptureListeners.fireEventAsync(onMouseCaptured, this, mouseId);\r
  58     }\r
  59     protected void fireMouseReleased(int mouseId) {\r
  60         mouseCaptureListeners.fireEventSync(onMouseReleased, this, mouseId);\r
  61     }\r
  62     protected void fireAsyncMouseReleased(int mouseId) {\r
  63         mouseCaptureListeners.fireEventAsync(onMouseReleased, this, mouseId);\r
  64     }\r
  65     \r
  66     public synchronized IMouseCaptureHandle captureMouse(int mouseId) {\r
  67         Set<IMouseCaptureHandle> captures = mouseCapture.get(mouseId);\r
  68         IMouseCaptureHandle capture = new MouseCaptureHandle(mouseId);\r
  69         capture.addMouseCaptureHandleListener(new IMouseCaptureHandleListener() {\r
  70             @Override\r
  71             public void onCaptureReleased(IMouseCaptureHandle sender) {\r
  72                 synchronized(MouseCaptureContext.this)\r
  73                 {\r
  74                     Set<IMouseCaptureHandle> captures = mouseCapture.get(sender.mouseId());\r
  75                     if (!captures.contains(this)) return;\r
  76                     captures.remove(this);\r
  77                     if (captures.isEmpty()) {\r
  78                         mouseCapture.remove(captures);\r
  79                         fireMouseReleased(sender.mouseId());\r
  80                     }\r
  81                 }\r
  82             }});\r
  83         if (captures==null) {\r
  84             captures = new HashSet<IMouseCaptureHandle>();\r
  85             mouseCapture.put(mouseId, captures);\r
  86             fireMouseCaptured(mouseId);\r
  87         }\r
  88         captures.add(capture);\r
  89         return capture;\r
  90     }\r
  91 \r
  92     \r
  93 \r
  94 }\r