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 *******************************************************************************/
14 * @author Toni Kalajainen
16 package org.simantics.utils.datastructures.hints;
18 import org.simantics.utils.datastructures.hints.IHintContext.Key;
20 public interface IHintListener {
23 * Value has changed or new value has spawned
25 * @param sender the stack
27 * @param oldValue the old value. If this value is null, a new hint has been added
28 * @param newValue the new value. This value is never null
30 void hintChanged(IHintObservable sender, Key key, Object oldValue, Object newValue);
34 * @param sender the stack
36 * @param oldValue the old value
38 void hintRemoved(IHintObservable sender, Key key, Object oldValue);