| /******************************************************************************* |
| * Copyright (c) 2008, 2009 Matthew Hall and others. |
| * 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: |
| * Matthew Hall - initial API and implementation (bug 194734) |
| * Matthew Hall - bug 281723 |
| ******************************************************************************/ |
| |
| package org.eclipse.jface.internal.databinding.swt; |
| |
| import org.eclipse.core.databinding.observable.value.DecoratingObservableValue; |
| import org.eclipse.core.databinding.observable.value.IObservableValue; |
| import org.eclipse.jface.databinding.swt.ISWTObservableValue; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.widgets.Event; |
| import org.eclipse.swt.widgets.Listener; |
| import org.eclipse.swt.widgets.Widget; |
| |
| /** |
| * @param <T> |
| * @since 3.3 |
| * |
| */ |
| public class SWTObservableValueDecorator<T> extends |
| DecoratingObservableValue<T> implements ISWTObservableValue<T>, |
| Listener { |
| private Widget widget; |
| |
| /** |
| * @param decorated |
| * @param widget |
| */ |
| public SWTObservableValueDecorator(IObservableValue<T> decorated, |
| Widget widget) { |
| super(decorated, true); |
| this.widget = widget; |
| WidgetListenerUtil.asyncAddListener(widget, SWT.Dispose, this); |
| } |
| |
| public void handleEvent(Event event) { |
| if (event.type == SWT.Dispose) |
| dispose(); |
| } |
| |
| public Widget getWidget() { |
| return widget; |
| } |
| |
| public synchronized void dispose() { |
| if (widget != null) { |
| WidgetListenerUtil.asyncRemoveListener(widget, SWT.Dispose, this); |
| widget = null; |
| } |
| super.dispose(); |
| } |
| } |