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comparison org.eclipse.jface.databinding/src/org/eclipse/jface/internal/databinding/provisional/swt/AbstractSWTVetoableValue.d @ 78:0a55d2d5a946

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Added file for databinding
author Frank Benoit <benoit@tionex.de>
date Tue, 14 Apr 2009 11:35:29 +0200
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76:f05e6e8b2f2d 78:0a55d2d5a946
1 /*******************************************************************************
2 * Copyright (c) 2006 The Pampered Chef, Inc. and others.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Eclipse Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html
7 *
8 * Contributors:
9 * The Pampered Chef, Inc. - initial API and implementation
10 ******************************************************************************/
11
12 module org.eclipse.jface.internal.databinding.provisional.swt.AbstractSWTVetoableValue;
13
14 import java.lang.all;
15
16 import org.eclipse.core.databinding.observable.Realm;
17 import org.eclipse.core.databinding.observable.value.AbstractVetoableValue;
18 import org.eclipse.jface.databinding.swt.ISWTObservableValue;
19 import org.eclipse.jface.databinding.swt.SWTObservables;
20 import org.eclipse.swt.events.DisposeEvent;
21 import org.eclipse.swt.events.DisposeListener;
22 import org.eclipse.swt.widgets.Widget;
23
24 /**
25 * NON-API - An abstract superclass for vetoable values that gurantees that the
26 * observable will be disposed when the control to which it is attached is
27 * disposed.
28 *
29 * @since 1.1
30 */
31 public abstract class AbstractSWTVetoableValue : AbstractVetoableValue , ISWTObservableValue {
32
33 private final Widget widget;
34
35 /**
36 * Standard constructor for an SWT VetoableValue. Makes sure that
37 * the observable gets disposed when the SWT widget is disposed.
38 *
39 * @param widget
40 */
41 protected this(Widget widget) {
42 this(SWTObservables.getRealm(widget.getDisplay()), widget);
43 }
44
45 /**
46 * Constructs a new instance for the provided <code>realm</code> and <code>widget</code>.
47 *
48 * @param realm
49 * @param widget
50 * @since 1.2
51 */
52 protected this(Realm realm, Widget widget) {
53 super(realm);
54 this.widget = widget;
55 if (widget is null) {
56 throw new IllegalArgumentException("The widget parameter is null."); //$NON-NLS-1$
57 }
58 widget.addDisposeListener(disposeListener);
59 }
60
61 private DisposeListener disposeListener = new class() DisposeListener {
62 public void widgetDisposed(DisposeEvent e) {
63 this.outer.dispose();
64 }
65 };
66
67 /**
68 * @return Returns the widget.
69 */
70 public Widget getWidget() {
71 return widget;
72 }
73 }