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Java > Open Source Codes > org > netbeans > modules > web > wizards > BaseWizardPanel


1 /*
2  * The contents of this file are subject to the terms of the Common Development
3  * and Distribution License (the License). You may not use this file except in
4  * compliance with the License.
5  *
6  * You can obtain a copy of the License at http://www.netbeans.org/cddl.html
7  * or http://www.netbeans.org/cddl.txt.
8  *
9  * When distributing Covered Code, include this CDDL Header Notice in each file
10  * and include the License file at http://www.netbeans.org/cddl.txt.
11  * If applicable, add the following below the CDDL Header, with the fields
12  * enclosed by brackets [] replaced by your own identifying information:
13  * "Portions Copyrighted [year] [name of copyright owner]"
14  *
15  * The Original Software is NetBeans. The Initial Developer of the Original
16  * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
17  * Microsystems, Inc. All Rights Reserved.
18  */
19
20 package org.netbeans.modules.web.wizards;
21
22 import java.util.HashSet JavaDoc;
23 import java.util.Iterator JavaDoc;
24 import java.util.Set JavaDoc;
25 import javax.swing.JPanel JavaDoc;
26 import javax.swing.event.ChangeEvent JavaDoc;
27 import javax.swing.event.ChangeListener JavaDoc;
28 import org.openide.util.HelpCtx;
29
30 abstract class BaseWizardPanel extends JPanel JavaDoc {
31
32     private final Set JavaDoc listeners = new HashSet JavaDoc(1); // Set<ChangeListener>
33
34     private static final long serialVersionUID = -2938499199217476217L;
35
36     public final void addChangeListener(ChangeListener JavaDoc l) {
37         synchronized(listeners) {
38             listeners.add(l);
39         }
40     }
41     public final void removeChangeListener(ChangeListener JavaDoc l) {
42         synchronized(listeners) {
43             listeners.remove(l);
44         }
45     }
46     protected final void fireChangeEvent() {
47         Iterator JavaDoc it;
48         synchronized(listeners) {
49             it = new HashSet JavaDoc(listeners).iterator();
50         }
51         ChangeEvent JavaDoc ev = new ChangeEvent JavaDoc(this);
52         while (it.hasNext()) {
53             ((ChangeListener JavaDoc)it.next()).stateChanged (ev);
54         }
55     }
56     abstract void setData();
57     abstract HelpCtx getHelp();
58 }
59
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