| /******************************************************************************* |
| * Copyright (c) 2007, 2008 Oracle. All rights reserved. |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v1.0, which accompanies this distribution |
| * and is available at http://www.eclipse.org/legal/epl-v10.html. |
| * |
| * Contributors: |
| * Oracle - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.jpt.utility.internal.model.listener.awt; |
| |
| import java.awt.EventQueue; |
| import org.eclipse.jpt.utility.model.event.PropertyChangeEvent; |
| import org.eclipse.jpt.utility.model.listener.PropertyChangeListener; |
| |
| /** |
| * Wrap another property change listener and forward events to it on the AWT |
| * event queue. |
| */ |
| public class AWTPropertyChangeListenerWrapper |
| implements PropertyChangeListener |
| { |
| private final PropertyChangeListener listener; |
| |
| |
| public AWTPropertyChangeListenerWrapper(PropertyChangeListener listener) { |
| super(); |
| if (listener == null) { |
| throw new NullPointerException(); |
| } |
| this.listener = listener; |
| } |
| |
| public void propertyChanged(PropertyChangeEvent event) { |
| if (EventQueue.isDispatchThread()) { |
| this.propertyChanged_(event); |
| } else { |
| this.executeOnEventQueue(this.buildRunnable(event)); |
| } |
| } |
| |
| private Runnable buildRunnable(final PropertyChangeEvent event) { |
| return new Runnable() { |
| public void run() { |
| AWTPropertyChangeListenerWrapper.this.propertyChanged_(event); |
| } |
| }; |
| } |
| |
| /** |
| * EventQueue#invokeLater(Runnable) seems to work OK; |
| * but using #invokeAndWait(Runnable) can sometimes make things |
| * more predictable when debugging, at the risk of deadlocks. |
| */ |
| private void executeOnEventQueue(Runnable r) { |
| EventQueue.invokeLater(r); |
| // try { |
| // EventQueue.invokeAndWait(r); |
| // } catch (InterruptedException ex) { |
| // throw new RuntimeException(ex); |
| // } catch (java.lang.reflect.InvocationTargetException ex) { |
| // throw new RuntimeException(ex); |
| // } |
| } |
| |
| void propertyChanged_(PropertyChangeEvent event) { |
| this.listener.propertyChanged(event); |
| } |
| |
| @Override |
| public String toString() { |
| return "AWT(" + this.listener.toString() + ")"; |
| } |
| |
| } |