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Java > Open Source Codes > com > tonbeller > wcf > component > Form


1 /*
2  * ====================================================================
3  * This software is subject to the terms of the Common Public License
4  * Agreement, available at the following URL:
5  * http://www.opensource.org/licenses/cpl.html .
6  * Copyright (C) 2003-2004 TONBELLER AG.
7  * All Rights Reserved.
8  * You must accept the terms of that agreement to use this software.
9  * ====================================================================
10  *
11  *
12  */
13 package com.tonbeller.wcf.component;
14
15
16 /**
17  * Sends events to FormListeners, e.g.
18  * if a button one component calls validate() on the <code>Form</code>,
19  * all <code>FormListeners</code> will receive this event.
20  * <p>
21  * <code>Form</code> instances may listen to each other. So (for example)
22  * expanding a node in a tree component may also validate text input
23  * in a form.
24  * <code>Form</code> may listen to each other without endless recursion,
25  * e.g. form1 may listen to form2 and form2 to form1.
26  * <p>
27  * <code>Form</code> ensures that a <code>FormListener</code> can not
28  * be registered more than once.
29  * @see FormListener
30  *
31  * @author av
32  */
33 public interface Form extends FormListener {
34   void addFormListener(FormListener listener);
35   void removeFormListener(FormListener listener);
36 }
37
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