| /******************************************************************************* |
| * Copyright (c) 2005, 2007 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.core.databinding.observable.value; |
| |
| import org.eclipse.core.databinding.observable.IObservablesListener; |
| |
| /** |
| * Listener for pre-change events for observable values. |
| * |
| * @since 1.0 |
| * |
| */ |
| public interface IValueChangingListener extends IObservablesListener { |
| |
| /** |
| * This method is called when the value is about to change and provides an |
| * opportunity to veto the change. The given event object must only be used |
| * locally in this method because it may be reused for other change |
| * notifications. The diff object referenced by the event is immutable and |
| * may be used non-locally. |
| * |
| * @param event |
| */ |
| public void handleValueChanging(ValueChangingEvent event); |
| |
| } |