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Java > Open Source Codes > nextapp > echo2 > app > button > ToggleButtonModel


1 /*
2  * This file is part of the Echo Web Application Framework (hereinafter "Echo").
3  * Copyright (C) 2002-2005 NextApp, Inc.
4  *
5  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
6  *
7  * The contents of this file are subject to the Mozilla Public License Version
8  * 1.1 (the "License"); you may not use this file except in compliance with
9  * the License. You may obtain a copy of the License at
10  * http://www.mozilla.org/MPL/
11  *
12  * Software distributed under the License is distributed on an "AS IS" basis,
13  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
14  * for the specific language governing rights and limitations under the
15  * License.
16  *
17  * Alternatively, the contents of this file may be used under the terms of
18  * either the GNU General Public License Version 2 or later (the "GPL"), or
19  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
20  * in which case the provisions of the GPL or the LGPL are applicable instead
21  * of those above. If you wish to allow use of your version of this file only
22  * under the terms of either the GPL or the LGPL, and not to allow others to
23  * use your version of this file under the terms of the MPL, indicate your
24  * decision by deleting the provisions above and replace them with the notice
25  * and other provisions required by the GPL or the LGPL. If you do not delete
26  * the provisions above, a recipient may use your version of this file under
27  * the terms of any one of the MPL, the GPL or the LGPL.
28  */
29
30 package nextapp.echo2.app.button;
31
32 import nextapp.echo2.app.event.ChangeListener;
33
34 /**
35  * Model for two-state toggle button components.
36  */
37 public interface ToggleButtonModel extends ButtonModel {
38     
39     /**
40      * Adds a <code>ChangeListener</code> to receive notification of state
41      * changes, i.e., to the selected state of a <code>ToggleButton</code>.
42      *
43      * @param l the listener to add
44      */
45     public void addChangeListener(ChangeListener l);
46     
47     /**
48      * Returns the selection state.
49      *
50      * @return the selection state
51      */
52     public boolean isSelected();
53     
54     /**
55      * Removes a <code>ChangeListener</code> from being notified of state
56      * changes, i.e., to the selected state of a <code>ToggleButton</code>.
57      *
58      * @param l the listener to remove
59      */
60     public void removeChangeListener(ChangeListener l);
61     
62     /**
63      * Sets the selection state.
64      *
65      * @param newValue the new selection state
66      */
67     public void setSelected(boolean newValue);
68 }
69
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