Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.g2d / src / org / simantics / g2d / canvas / impl / MouseCaptureHandle.java

diff --git a/bundles/org.simantics.g2d/src/org/simantics/g2d/canvas/impl/MouseCaptureHandle.java b/bundles/org.simantics.g2d/src/org/simantics/g2d/canvas/impl/MouseCaptureHandle.java
new file mode 100644 (file)
index 0000000..a57d979
--- /dev/null
+++ b/bundles/org.simantics.g2d/src/org/simantics/g2d/canvas/impl/MouseCaptureHandle.java
@@ -0,0 +1,71 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.g2d.canvas.impl;\r
+\r
+import org.simantics.g2d.canvas.IMouseCaptureHandle;\r
+import org.simantics.g2d.canvas.IMouseCaptureHandleListener;\r
+import org.simantics.utils.datastructures.ListenerList;\r
+\r
+/**\r
+ * @author Toni Kalajainen\r
+ */\r
+public class MouseCaptureHandle implements IMouseCaptureHandle {\r
+\r
+    boolean released = false;\r
+    final int mouseId;\r
+    ListenerList<IMouseCaptureHandleListener> listeners;\r
+\r
+    public MouseCaptureHandle(int mouseId) \r
+    {\r
+        this.mouseId = mouseId;\r
+    }\r
+    \r
+    @Override\r
+    public int mouseId() {\r
+        return mouseId;\r
+    }\r
+\r
+    @Override\r
+    public void release() {\r
+        synchronized(this) {\r
+            if (released) return;\r
+            released = true;\r
+        }\r
+        fireOnReleased();\r
+    }\r
+\r
+    void fireOnReleased() {\r
+        ListenerList<IMouseCaptureHandleListener> lis;\r
+        synchronized(this) {\r
+            lis = listeners;\r
+            if (lis==null) return;\r
+        }\r
+        \r
+        for (IMouseCaptureHandleListener l : lis.getListeners())\r
+            l.onCaptureReleased(this);\r
+    }\r
+\r
+    @Override\r
+    public void removeMouseCaptureHandleListener(IMouseCaptureHandleListener listener) {    \r
+        if (listeners == null) return;\r
+        listeners.remove(listener);\r
+    }\r
+\r
+    @Override\r
+    public synchronized void addMouseCaptureHandleListener(IMouseCaptureHandleListener listener) {\r
+        if (listeners == null) {\r
+            listeners = new ListenerList<IMouseCaptureHandleListener>(IMouseCaptureHandleListener.class);\r
+        }\r
+        listeners.add(listener);\r
+    }\r
+    \r
+}\r