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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. 
Author:
Carl Quinn, Amy Fowler, David Mendenhall
See Also:
WindowEvent
WindowListener
Tutorial: Writing a Window Listener
Since:
1.1/**
 * An abstract adapter class for receiving window 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 WindowEvent} listener
 * and override the methods for the events of interest. (If you implement the
 * {@code 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.)
 * <P>
 * Create a listener object using the extended class and then register it with
 * a Window using the window's {@code 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 {@code WindowEvent} is passed to it.
 *
 * @see WindowEvent
 * @see WindowListener
 * @see <a href="http://docs.oracle.com/javase/tutorial/uiswing/events/windowlistener.html">Tutorial: Writing a Window Listener</a>
 *
 * @author Carl Quinn
 * @author Amy Fowler
 * @author David Mendenhall
 * @since 1.1
 */
public abstract class WindowAdapter
    implements WindowListener, WindowStateListener, WindowFocusListener
{
    
Invoked when a window has been opened.
/**
     * 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.
/**
     * 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.
/**
     * Invoked when a window has been closed.
     */
    public void windowClosed(WindowEvent e) {}

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

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

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

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

    
Invoked when a window state is changed.
Since:
1.4/**
     * 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/**
     * 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/**
     * 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) {}
}