java.awt.event.ComponentAdapter Maven / Gradle / Ivy

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*/


  


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.
 * 

 * Extend this class to create a ComponentEvent listener 
 * and override the methods for the events of interest. (If you implement the 
 * ComponentListener 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.)
 * 
 * Create a listener object using your class and then register it with a
 * component using the component's addComponentListener 
 * method. When the component's size, location, or visibility
 * changes, the relevant method in the listener object is invoked,
 * and the ComponentEvent is passed to it.
 *
 * @see ComponentEvent
 * @see ComponentListener
 * @see Tutorial: Writing a Component Listener
 * @see Reference: The Java Class Libraries (update file)
 * 
 * @author Carl Quinn
 * @version 1.15 01/23/03
 * @since 1.1
 */
public abstract class ComponentAdapter implements ComponentListener
{

    public ComponentAdapter() { }

    /** 
     * 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) { }
}