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/*
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* Copyright (c) 1996, 2006, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.awt.event;
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import java.util.EventListener;
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/**
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* The listener interface for receiving container events.
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* The class that is interested in processing a container event
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* either implements this interface (and all the methods it
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* contains) or extends the abstract <code>ContainerAdapter</code> class
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* (overriding only the methods of interest).
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* The listener object created from that class is then registered with a
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* component using the component's <code>addContainerListener</code>
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* method. When the container's contents change because a component
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* has been added or removed, the relevant method in the listener object
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* is invoked, and the <code>ContainerEvent</code> is passed to it.
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* <P>
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* Container events are provided for notification purposes ONLY;
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* The AWT will automatically handle add and remove operations
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* internally so the program works properly regardless of
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* whether the program registers a <code>ComponentListener</code> or not.
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*
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* @see ContainerAdapter
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* @see ContainerEvent
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* @see <a href="http://java.sun.com/docs/books/tutorial/post1.0/ui/containerlistener.html">Tutorial: Writing a Container Listener</a>
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*
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* @author Tim Prinzing
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* @author Amy Fowler
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* @since 1.1
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*/
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public interface ContainerListener extends EventListener {
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/**
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* Invoked when a component has been added to the container.
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*/
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public void componentAdded(ContainerEvent e);
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/**
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* Invoked when a component has been removed from the container.
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*/
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public void componentRemoved(ContainerEvent e);
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}
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