J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1996-2006 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package java.awt.event; |
| 27 | |
| 28 | import java.util.EventListener; |
| 29 | |
| 30 | /** |
| 31 | * The listener interface for receiving container events. |
| 32 | * The class that is interested in processing a container event |
| 33 | * either implements this interface (and all the methods it |
| 34 | * contains) or extends the abstract <code>ContainerAdapter</code> class |
| 35 | * (overriding only the methods of interest). |
| 36 | * The listener object created from that class is then registered with a |
| 37 | * component using the component's <code>addContainerListener</code> |
| 38 | * method. When the container's contents change because a component |
| 39 | * has been added or removed, the relevant method in the listener object |
| 40 | * is invoked, and the <code>ContainerEvent</code> is passed to it. |
| 41 | * <P> |
| 42 | * Container events are provided for notification purposes ONLY; |
| 43 | * The AWT will automatically handle add and remove operations |
| 44 | * internally so the program works properly regardless of |
| 45 | * whether the program registers a <code>ComponentListener</code> or not. |
| 46 | * |
| 47 | * @see ContainerAdapter |
| 48 | * @see ContainerEvent |
| 49 | * @see <a href="http://java.sun.com/docs/books/tutorial/post1.0/ui/containerlistener.html">Tutorial: Writing a Container Listener</a> |
| 50 | * |
| 51 | * @author Tim Prinzing |
| 52 | * @author Amy Fowler |
| 53 | * @since 1.1 |
| 54 | */ |
| 55 | public interface ContainerListener extends EventListener { |
| 56 | /** |
| 57 | * Invoked when a component has been added to the container. |
| 58 | */ |
| 59 | public void componentAdded(ContainerEvent e); |
| 60 | |
| 61 | /** |
| 62 | * Invoked when a component has been removed from the container. |
| 63 | */ |
| 64 | public void componentRemoved(ContainerEvent e); |
| 65 | |
| 66 | } |