28 /**
29 * An abstract adapter class for receiving window events.
30 * The methods in this class are empty. This class exists as
31 * convenience for creating listener objects.
32 * <P>
33 * Extend this class to create a <code>WindowEvent</code> listener
34 * and override the methods for the events of interest. (If you implement the
35 * <code>WindowListener</code> interface, you have to define all of
36 * the methods in it. This abstract class defines null methods for them
37 * all, so you can only have to define methods for events you care about.)
38 * <P>
39 * Create a listener object using the extended class and then register it with
40 * a Window using the window's <code>addWindowListener</code>
41 * method. When the window's status changes by virtue of being opened,
42 * closed, activated or deactivated, iconified or deiconified,
43 * the relevant method in the listener
44 * object is invoked, and the <code>WindowEvent</code> is passed to it.
45 *
46 * @see WindowEvent
47 * @see WindowListener
48 * @see <a href="http://java.sun.com/docs/books/tutorial/post1.0/ui/windowlistener.html">Tutorial: Writing a Window Listener</a>
49 *
50 * @author Carl Quinn
51 * @author Amy Fowler
52 * @author David Mendenhall
53 * @since 1.1
54 */
55 public abstract class WindowAdapter
56 implements WindowListener, WindowStateListener, WindowFocusListener
57 {
58 /**
59 * Invoked when a window has been opened.
60 */
61 public void windowOpened(WindowEvent e) {}
62
63 /**
64 * Invoked when a window is in the process of being closed.
65 * The close operation can be overridden at this point.
66 */
67 public void windowClosing(WindowEvent e) {}
68
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28 /**
29 * An abstract adapter class for receiving window events.
30 * The methods in this class are empty. This class exists as
31 * convenience for creating listener objects.
32 * <P>
33 * Extend this class to create a <code>WindowEvent</code> listener
34 * and override the methods for the events of interest. (If you implement the
35 * <code>WindowListener</code> interface, you have to define all of
36 * the methods in it. This abstract class defines null methods for them
37 * all, so you can only have to define methods for events you care about.)
38 * <P>
39 * Create a listener object using the extended class and then register it with
40 * a Window using the window's <code>addWindowListener</code>
41 * method. When the window's status changes by virtue of being opened,
42 * closed, activated or deactivated, iconified or deiconified,
43 * the relevant method in the listener
44 * object is invoked, and the <code>WindowEvent</code> is passed to it.
45 *
46 * @see WindowEvent
47 * @see WindowListener
48 * @see <a href="http://docs.oracle.com/javase/tutorial/uiswing/events/windowlistener.html">Tutorial: Writing a Window Listener</a>
49 *
50 * @author Carl Quinn
51 * @author Amy Fowler
52 * @author David Mendenhall
53 * @since 1.1
54 */
55 public abstract class WindowAdapter
56 implements WindowListener, WindowStateListener, WindowFocusListener
57 {
58 /**
59 * Invoked when a window has been opened.
60 */
61 public void windowOpened(WindowEvent e) {}
62
63 /**
64 * Invoked when a window is in the process of being closed.
65 * The close operation can be overridden at this point.
66 */
67 public void windowClosing(WindowEvent e) {}
68
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