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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* 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).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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*/
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</code> 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</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.
* <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</code> or not.
*
* @see ComponentAdapter
* @see ComponentEvent
* @see <a href="http://java.sun.com/docs/books/tutorial/post1.0/ui/componentlistener.html">Tutorial: Writing a Component Listener</a>
*
* @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);
}