| /******************************************************************************* |
| * Copyright (c) 2008 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 245647) |
| ******************************************************************************/ |
| |
| package org.eclipse.jface.internal.databinding.viewers; |
| |
| import org.eclipse.core.databinding.observable.value.DecoratingObservableValue; |
| import org.eclipse.core.databinding.observable.value.IObservableValue; |
| import org.eclipse.jface.databinding.viewers.IViewerObservableValue; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.widgets.Control; |
| import org.eclipse.swt.widgets.Event; |
| import org.eclipse.swt.widgets.Listener; |
| |
| /** |
| * @since 3.3 |
| * |
| */ |
| public class ViewerObservableValueDecorator extends DecoratingObservableValue |
| implements IViewerObservableValue, Listener { |
| private Viewer viewer; |
| |
| /** |
| * @param decorated |
| * @param viewer |
| */ |
| public ViewerObservableValueDecorator(IObservableValue decorated, |
| Viewer viewer) { |
| super(decorated, true); |
| this.viewer = viewer; |
| viewer.getControl().addListener(SWT.Dispose, this); |
| } |
| |
| public void handleEvent(Event event) { |
| if (event.type == SWT.Dispose) |
| dispose(); |
| } |
| |
| public Viewer getViewer() { |
| return viewer; |
| } |
| |
| public synchronized void dispose() { |
| if (viewer != null) { |
| Control control = viewer.getControl(); |
| if (control != null && !control.isDisposed()) { |
| control.removeListener(SWT.Dispose, this); |
| } |
| viewer = null; |
| } |
| super.dispose(); |
| } |
| } |