1 /* 2 * Copyright (c) 1999, 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 ancestor moved and resized events. 32 * The class that is interested in processing these events either implements 33 * this interface (and all the methods it contains) or extends the abstract 34 * <code>HierarchyBoundsAdapter</code> class (overriding only the method of 35 * interest). 36 * The listener object created from that class is then registered with a 37 * Component using the Component's <code>addHierarchyBoundsListener</code> 38 * method. When the hierarchy to which the Component belongs changes by 39 * the resizing or movement of an ancestor, the relevant method in the listener 40 * object is invoked, and the <code>HierarchyEvent</code> is passed to it. 41 * <p> 42 * Hierarchy events are provided for notification purposes ONLY; 43 * The AWT will automatically handle changes to the hierarchy internally so 44 * that GUI layout works properly regardless of whether a 45 * program registers an <code>HierarchyBoundsListener</code> or not. 46 * 47 * @author David Mendenhall 48 * @see HierarchyBoundsAdapter 49 * @see HierarchyEvent 50 * @since 1.3 51 */ 52 public interface HierarchyBoundsListener extends EventListener { 53 /** 54 * Called when an ancestor of the source is moved. 55 */ 56 public void ancestorMoved(HierarchyEvent e); 57 58 /** 59 * Called when an ancestor of the source is resized. 60 */ 61 public void ancestorResized(HierarchyEvent e); 62 }