| /******************************************************************************* |
| * Copyright (c) 2006 The Pampered Chef, Inc. 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: |
| * The Pampered Chef, Inc. - initial API and implementation |
| ******************************************************************************/ |
| |
| package org.eclipse.jface.internal.databinding.provisional.swt; |
| |
| import org.eclipse.core.databinding.observable.value.AbstractVetoableValue; |
| import org.eclipse.jface.databinding.swt.ISWTObservableValue; |
| import org.eclipse.jface.databinding.swt.SWTObservables; |
| import org.eclipse.swt.events.DisposeEvent; |
| import org.eclipse.swt.events.DisposeListener; |
| import org.eclipse.swt.widgets.Widget; |
| |
| /** |
| * An abstract superclass for vetoable values that gurantees that the |
| * observable will be disposed when the control to which it is attached is |
| * disposed. |
| * |
| * @since 3.3 |
| */ |
| public abstract class AbstractSWTVetoableValue extends AbstractVetoableValue implements ISWTObservableValue { |
| |
| private final Widget widget; |
| |
| /** |
| * Standard constructor for an SWT VetoableValue. Makes sure that |
| * the observable gets disposed when the SWT widget is disposed. |
| * |
| * @param widget |
| */ |
| protected AbstractSWTVetoableValue(Widget widget) { |
| super(SWTObservables.getRealm(widget.getDisplay())); |
| this.widget = widget; |
| if (widget == null) { |
| throw new IllegalArgumentException("The widget parameter is null."); //$NON-NLS-1$ |
| } |
| widget.addDisposeListener(disposeListener); |
| } |
| |
| private DisposeListener disposeListener = new DisposeListener() { |
| public void widgetDisposed(DisposeEvent e) { |
| AbstractSWTVetoableValue.this.dispose(); |
| } |
| }; |
| |
| /** |
| * @return Returns the widget. |
| */ |
| public Widget getWidget() { |
| return widget; |
| } |
| } |