1 /* 2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package java.awt.event; 27 28 import java.util.EventListener; 29 30 /** 31 * The listener interface for receiving window state events. 32 * <p> 33 * The class that is interested in processing a window state event 34 * either implements this interface (and all the methods it contains) 35 * or extends the abstract <code>WindowAdapter</code> class 36 * (overriding only the methods of interest). 37 * <p> 38 * The listener object created from that class is then registered with 39 * a window using the <code>Window</code>'s 40 * <code>addWindowStateListener</code> method. When the window's 41 * state changes by virtue of being iconified, maximized etc., the 42 * <code>windowStateChanged</code> method in the listener object is 43 * invoked, and the <code>WindowEvent</code> is passed to it. 44 * 45 * @see java.awt.event.WindowAdapter 46 * @see java.awt.event.WindowEvent 47 * 48 * @since 1.4 49 */ 50 public interface WindowStateListener extends EventListener { 51 /** 52 * Invoked when window state is changed. 53 * @param e the event to be processed 54 */ 55 public void windowStateChanged(WindowEvent e); 56 }