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Java > Open Source Codes > org > w3c > dom > events > EventListener


1 /*
2  * Copyright (c) 2000 World Wide Web Consortium,
3  * (Massachusetts Institute of Technology, Institut National de
4  * Recherche en Informatique et en Automatique, Keio University). All
5  * Rights Reserved. This program is distributed under the W3C's Software
6  * Intellectual Property License. This program is distributed in the
7  * hope that it will be useful, but WITHOUT ANY WARRANTY; without even
8  * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
9  * PURPOSE.
10  * See W3C License http://www.w3.org/Consortium/Legal/ for more details.
11  */
12
13 package org.w3c.dom.events;
14
15 /**
16  * The <code>EventListener</code> interface is the primary method for
17  * handling events. Users implement the <code>EventListener</code> interface
18  * and register their listener on an <code>EventTarget</code> using the
19  * <code>AddEventListener</code> method. The users should also remove their
20  * <code>EventListener</code> from its <code>EventTarget</code> after they
21  * have completed using the listener.
22  * <p> When a <code>Node</code> is copied using the <code>cloneNode</code>
23  * method the <code>EventListener</code>s attached to the source
24  * <code>Node</code> are not attached to the copied <code>Node</code>. If
25  * the user wishes the same <code>EventListener</code>s to be added to the
26  * newly created copy the user must add them manually.
27  * <p>See also the <a HREF='http://www.w3.org/TR/2000/REC-DOM-Level-2-Events-20001113'>Document Object Model (DOM) Level 2 Events Specification</a>.
28  * @since DOM Level 2
29  */
30 public interface EventListener {
31     /**
32      * This method is called whenever an event occurs of the type for which
33      * the <code> EventListener</code> interface was registered.
34      * @param evt The <code>Event</code> contains contextual information
35      * about the event. It also contains the <code>stopPropagation</code>
36      * and <code>preventDefault</code> methods which are used in
37      * determining the event's flow and default action.
38      */
39     public void handleEvent(Event JavaDoc evt);
40
41 }
42
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