Java example source code file (ComponentListener.java)

This example Java source code file (ComponentListener.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

componentlistener, eventlistener, util

The ComponentListener.java Java example source code

/*
 * Copyright (c) 1996, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package java.awt.event;

import java.util.EventListener;

/**
 * The listener interface for receiving component events.
 * The class that is interested in processing a component event
 * either implements this interface (and all the methods it
 * contains) or extends the abstract <code>ComponentAdapter class
 * (overriding only the methods of interest).
 * The listener object created from that class is then registered with a
 * component using the component's <code>addComponentListener
 * method. When the component's size, location, or visibility
 * changes, the relevant method in the listener object is invoked,
 * and the <code>ComponentEvent is passed to it.
 * <P>
 * Component events are provided for notification purposes ONLY;
 * The AWT will automatically handle component moves and resizes
 * internally so that GUI layout works properly regardless of
 * whether a program registers a <code>ComponentListener or not.
 *
 * @see ComponentAdapter
 * @see ComponentEvent
 * @see <a href="http://docs.oracle.com/javase/tutorial/uiswing/events/componentlistener.html">Tutorial: Writing a Component Listener
 *
 * @author Carl Quinn
 * @since 1.1
 */
public interface ComponentListener extends EventListener {
    /**
     * Invoked when the component's size changes.
     */
    public void componentResized(ComponentEvent e);

    /**
     * Invoked when the component's position changes.
     */
    public void componentMoved(ComponentEvent e);

    /**
     * Invoked when the component has been made visible.
     */
    public void componentShown(ComponentEvent e);

    /**
     * Invoked when the component has been made invisible.
     */
    public void componentHidden(ComponentEvent e);
}