/*******************************************************************************
* 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();
}
}