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annotate 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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children b74ac5dfcc06
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6208d4f6a277 Added trees for databinding.beans and observable
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1 /*******************************************************************************
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2 * Copyright (c) 2005, 2007 IBM Corporation 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 * IBM Corporation - initial API and implementation
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10 *******************************************************************************/
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11 package org.eclipse.core.databinding.observable.value;
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12
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13 import org.eclipse.core.databinding.observable.IObservablesListener;
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14
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15 /**
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16 * Listener for pre-change events for observable values.
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17 *
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18 * @since 1.0
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19 *
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20 */
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21 public interface IValueChangingListener : IObservablesListener {
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22
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23 /**
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24 * This method is called when the value is about to change and provides an
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25 * opportunity to veto the change. The given event object must only be used
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26 * locally in this method because it may be reused for other change
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27 * notifications. The diff object referenced by the event is immutable and
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28 * may be used non-locally.
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29 *
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30 * @param event
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31 */
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32 public void handleValueChanging(ValueChangingEvent event);
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33
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34 }