componentadapter.java

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/*
 * @(#)ComponentAdapter.java	1.15 03/01/23
 *
 * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package java.awt.event;

/**
 * An abstract adapter class for receiving component events.
 * The methods in this class are empty. This class exists as
 * convenience for creating listener objects.
 * <P>
 * Extend this class to create a <code>ComponentEvent</code> listener 
 * and override the methods for the events of interest. (If you implement the 
 * <code>ComponentListener</code> interface, you have to define all of
 * the methods in it. This abstract class defines null methods for them
 * all, so you can only have to define methods for events you care about.)
 * <P>
 * Create a listener object using your class and then register it with a
 * component using the component's <code>addComponentListener</code> 
 * method. When the component's size, location, or visibility
 * changes, the relevant method in the listener object is invoked,
 * and the <code>ComponentEvent</code> is passed to it.
 *
 * @see ComponentEvent
 * @see ComponentListener
 * @see <a href="http://java.sun.com/docs/books/tutorial/post1.0/ui/componentlistener.html">Tutorial: Writing a Component Listener</a>
 * @see <a href="http://www.awl.com/cp/javaseries/jcl1_2.html">Reference: The Java Class Libraries (update file)</a>
 * 
 * @author Carl Quinn
 * @version 1.15 01/23/03
 * @since 1.1
 */
public abstract class ComponentAdapter implements ComponentListener {
    /**
     * 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) {}
}