1 /*******************************************************************************
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2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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3 * in Industry THTH ry.
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 *******************************************************************************/
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14 * @author Toni Kalajainen
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16 package org.simantics.utils.datastructures.hints;
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18 import org.simantics.utils.datastructures.hints.IHintContext.Key;
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20 public interface IHintListener {
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23 * Value has changed or new value has spawned
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25 * @param sender the stack
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26 * @param key the key
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27 * @param oldValue the old value. If this value is null, a new hint has been added
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28 * @param newValue the new value. This value is never null
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30 void hintChanged(IHintObservable sender, Key key, Object oldValue, Object newValue);
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34 * @param sender the stack
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35 * @param key the key
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36 * @param oldValue the old value
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38 void hintRemoved(IHintObservable sender, Key key, Object oldValue);
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