001/* 002 * Copyright (c) 2000 World Wide Web Consortium, 003 * (Massachusetts Institute of Technology, Institut National de 004 * Recherche en Informatique et en Automatique, Keio University). All 005 * Rights Reserved. This program is distributed under the W3C's Software 006 * Intellectual Property License. This program is distributed in the 007 * hope that it will be useful, but WITHOUT ANY WARRANTY; without even 008 * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 009 * PURPOSE. 010 * See W3C License http://www.w3.org/Consortium/Legal/ for more details. 011 */ 012 013package org.w3c.dom.events; 014 015/** 016 * The <code>EventListener</code> interface is the primary method for 017 * handling events. Users implement the <code>EventListener</code> interface 018 * and register their listener on an <code>EventTarget</code> using the 019 * <code>AddEventListener</code> method. The users should also remove their 020 * <code>EventListener</code> from its <code>EventTarget</code> after they 021 * have completed using the listener. 022 * <p> When a <code>Node</code> is copied using the <code>cloneNode</code> 023 * method the <code>EventListener</code>s attached to the source 024 * <code>Node</code> are not attached to the copied <code>Node</code>. If 025 * the user wishes the same <code>EventListener</code>s to be added to the 026 * newly created copy the user must add them manually. 027 * <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>. 028 * @since DOM Level 2 029 */ 030public interface EventListener { 031 /** 032 * This method is called whenever an event occurs of the type for which 033 * the <code> EventListener</code> interface was registered. 034 * @param evt The <code>Event</code> contains contextual information 035 * about the event. It also contains the <code>stopPropagation</code> 036 * and <code>preventDefault</code> methods which are used in 037 * determining the event's flow and default action. 038 */ 039 public void handleEvent(Event evt); 040 041}