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


1 /*******************************************************************************
2  * Copyright (c) 2000, 2006 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 import org.eclipse.swt.internal.SWTEventListener;
15
16 /**
17  * Classes which implement this interface provide methods
18  * that deal with the expanding and collapsing of <code>ExpandItem</code>s.
19  *
20  * <p>
21  * After creating an instance of a class that implements
22  * this interface it can be added to a <code>ExpandBar</code>
23  * control using the <code>addExpandListener</code> method and
24  * removed using the <code>removeExpandListener</code> method.
25  * When a item of the <code>ExpandBar</code> is expanded or
26  * collapsed, the appropriate method will be invoked.
27  * </p>
28  *
29  * @see ExpandAdapter
30  * @see ExpandEvent
31  *
32  * @since 3.2
33  */
34 public interface ExpandListener extends SWTEventListener {
35
36 /**
37  * Sent when an item is collapsed.
38  *
39  * @param e an event containing information about the operation
40  */
41 public void itemCollapsed(ExpandEvent e);
42
43 /**
44  * Sent when an item is expanded.
45  *
46  * @param e an event containing information about the operation
47  */
48 public void itemExpanded(ExpandEvent e);
49 }
50
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