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Java Source | 1998-03-20 | 2.3 KB | 63 lines |
- /*
- * @(#)ComponentAdapter.java 1.9 98/03/18
- *
- * Copyright 1996, 1997 by Sun Microsystems, Inc.,
- * 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
- * All rights reserved.
- *
- * This software is the confidential and proprietary information
- * of Sun Microsystems, Inc. ("Confidential Information"). You
- * shall not disclose such Confidential Information and shall use
- * it only in accordance with the terms of the license agreement
- * you entered into with Sun.
- */
-
- 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>
- *
- * @version 1.9 03/18/98
- * @author Carl Quinn
- */
- 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) {}
- }
-