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