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

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*/


  


package java.awt.event;

/** 
 * An abstract adapter class for receiving window events.
 * The methods in this class are empty. This class exists as
 * convenience for creating listener objects.
 * 

 * Extend this class to create a WindowEvent listener 
 * and override the methods for the events of interest. (If you implement the 
 * WindowListener 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 the extended class and then register it with 
 * a Window using the window's addWindowListener 
 * method. When the window's status changes by virtue of being opened,
 * closed, activated or deactivated, iconified or deiconified, 
 * the relevant method in the listener
 * object is invoked, and the WindowEvent is passed to it.
 *
 * @see WindowEvent
 * @see WindowListener
 * @see Tutorial: Writing a Window Listener
 * @see Reference: The Java Class Libraries (update file)
 *
 * @author Carl Quinn
 * @author Amy Fowler
 * @author David Mendenhall
 * @version 1.19, 01/23/03
 * @since 1.1
 */
public abstract class WindowAdapter
//    implements WindowListener, WindowStateListener, WindowFocusListener
    implements WindowListener, WindowFocusListener
{

    public WindowAdapter() { }

    /** 
     * Invoked when a window has been opened.
     */
    public void windowOpened(WindowEvent e) { }

    /** 
     * Invoked when a window is in the process of being closed.
     * The close operation can be overridden at this point.
     */
    public void windowClosing(WindowEvent e) { }

    /** 
     * Invoked when a window has been closed.
     */
    public void windowClosed(WindowEvent e) { }

    /** 
     * Invoked when a window is iconified.
     */
    public void windowIconified(WindowEvent e) { }

    /** 
     * Invoked when a window is de-iconified.
     */
    public void windowDeiconified(WindowEvent e) { }

    /** 
     * Invoked when a window is activated.
     */
    public void windowActivated(WindowEvent e) { }

     /** 
      * Invoked when a window is de-activated.
      */
     public void windowDeactivated(WindowEvent e) { }
 
    /** 
     * Invoked when a window state is changed.
     * @since 1.4
     */
  //     public void windowStateChanged(WindowEvent e) { }

    /** 
     * Invoked when the Window is set to be the focused Window, which means
     * that the Window, or one of its subcomponents, will receive keyboard
     * events.
     *
     * @since 1.4
     */
    public void windowGainedFocus(WindowEvent e) { }

    /** 
     * Invoked when the Window is no longer the focused Window, which means
     * that keyboard events will no longer be delivered to the Window or any of
     * its subcomponents.
     *
     * @since 1.4
     */
    public void windowLostFocus(WindowEvent e) { }
}