/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
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 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
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 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/*
 * This file is available under and governed by the GNU General Public
 * License version 2 only, as published by the Free Software Foundation.
 * However, the following notice accompanied the original version of this
 * file and, per its terms, should not be removed:
 *
 * Copyright (c) 2000 World Wide Web Consortium,
 * (Massachusetts Institute of Technology, Institut National de
 * Recherche en Informatique et en Automatique, Keio University). All
 * Rights Reserved. This program is distributed under the W3C's Software
 * Intellectual Property License. This program is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY; without even
 * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE.
 * See W3C License http://www.w3.org/Consortium/Legal/ for more details.
 */

package org.w3c.dom.events;

/**
 *  The <code>EventListener</code> interface is the primary method for
 * handling events. Users implement the <code>EventListener</code> interface
 * and register their listener on an <code>EventTarget</code> using the
 * <code>AddEventListener</code> method. The users should also remove their
 * <code>EventListener</code> from its <code>EventTarget</code> after they
 * have completed using the listener.
 * <p> When a <code>Node</code> is copied using the <code>cloneNode</code>
 * method the <code>EventListener</code>s attached to the source
 * <code>Node</code> are not attached to the copied <code>Node</code>. If
 * the user wishes the same <code>EventListener</code>s to be added to the
 * newly created copy the user must add them manually.
 * <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>.
 * @since DOM Level 2
 */
public interface EventListener {
    /**
     *  This method is called whenever an event occurs of the type for which
     * the <code> EventListener</code> interface was registered.
     * @param evt  The <code>Event</code> contains contextual information
     *   about the event. It also contains the <code>stopPropagation</code>
     *   and <code>preventDefault</code> methods which are used in
     *   determining the event's flow and default action.
     */
    public void handleEvent(Event evt);

}
