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comparison org.eclipse.core.databinding.observable/src/org/eclipse/core/databinding/observable/value/IValueChangingListener.d @ 95:6208d4f6a277

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Added trees for databinding.beans and observable
author Frank Benoit <benoit@tionex.de>
date Tue, 21 Apr 2009 10:55:51 +0200
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94:1d37a7813832 95:6208d4f6a277
1 /*******************************************************************************
2 * Copyright (c) 2005, 2007 IBM Corporation 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 * IBM Corporation - initial API and implementation
10 *******************************************************************************/
11 package org.eclipse.core.databinding.observable.value;
12
13 import org.eclipse.core.databinding.observable.IObservablesListener;
14
15 /**
16 * Listener for pre-change events for observable values.
17 *
18 * @since 1.0
19 *
20 */
21 public interface IValueChangingListener : IObservablesListener {
22
23 /**
24 * This method is called when the value is about to change and provides an
25 * opportunity to veto the change. The given event object must only be used
26 * locally in this method because it may be reused for other change
27 * notifications. The diff object referenced by the event is immutable and
28 * may be used non-locally.
29 *
30 * @param event
31 */
32 public void handleValueChanging(ValueChangingEvent event);
33
34 }