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Java > Open Source Codes > org > eclipse > swt > events > TreeAdapter


1 /*******************************************************************************
2  * Copyright (c) 2000, 2003 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials
4  * are made available under the terms of the Eclipse Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/epl-v10.html
7  *
8  * Contributors:
9  * IBM Corporation - initial API and implementation
10  *******************************************************************************/
11 package org.eclipse.swt.events;
12
13
14 /**
15  * This adapter class provides default implementations for the
16  * methods described by the <code>TreeListener</code> interface.
17  * <p>
18  * Classes that wish to deal with <code>TreeEvent</code>s can
19  * extend this class and override only the methods which they are
20  * interested in.
21  * </p>
22  *
23  * @see TreeListener
24  * @see TreeEvent
25  */
26 public abstract class TreeAdapter implements TreeListener {
27
28 /**
29  * Sent when a tree branch is collapsed.
30  * The default behavior is to do nothing.
31  *
32  * @param e an event containing information about the tree operation
33  */
34 public void treeCollapsed(TreeEvent e) {
35 }
36
37 /**
38  * Sent when a tree branch is expanded.
39  * The default behavior is to do nothing.
40  *
41  * @param e an event containing information about the tree operation
42  */
43 public void treeExpanded(TreeEvent e) {
44 }
45 }
46
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