1 /*******************************************************************************
2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
4 * All rights reserved. This program and the accompanying materials
5 * are made available under the terms of the Eclipse Public License v1.0
6 * which accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.utils.datastructures.hints;
14 import org.simantics.utils.datastructures.hints.IHintContext.Key;
17 * A hint listener that reports all changes to the listened hint through
18 * hintChanged instead of hintChanged+hintRemoved. When the hint is removed,
19 * a null newValue will be given.
22 * This class in only meant to be used in cases where it is ok for the client to
23 * receive <code>null</code> as the new hint value. In other cases clients
24 * should simply implement IHintListener.
27 * @author Tuukka Lehtonen
29 public abstract class HintListenerAdapter implements IHintListener {
32 public void hintRemoved(IHintObservable sender, Key key, Object oldValue) {
33 hintChanged(sender, key, oldValue, null);