22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.awt.event;
27
28 import java.util.EventListener;
29
30 /**
31 * The listener interface for receiving <code>WindowEvents</code>, including
32 * <code>WINDOW_GAINED_FOCUS</code> and <code>WINDOW_LOST_FOCUS</code> events.
33 * The class that is interested in processing a <code>WindowEvent</code>
34 * either implements this interface (and
35 * all the methods it contains) or extends the abstract
36 * <code>WindowAdapter</code> class (overriding only the methods of interest).
37 * The listener object created from that class is then registered with a
38 * <code>Window</code>
39 * using the <code>Window</code>'s <code>addWindowFocusListener</code> method.
40 * When the <code>Window</code>'s
41 * status changes by virtue of it being opened, closed, activated, deactivated,
42 * iconified, or deiconified, or by focus being transfered into or out of the
43 * <code>Window</code>, the relevant method in the listener object is invoked,
44 * and the <code>WindowEvent</code> is passed to it.
45 *
46 * @author David Mendenhall
47 *
48 * @see WindowAdapter
49 * @see WindowEvent
50 * @see <a href="http://docs.oracle.com/javase/tutorial/uiswing/events/windowlistener.html">Tutorial: Writing a Window Listener</a>
51 *
52 * @since 1.4
53 */
54 public interface WindowFocusListener extends EventListener {
55
56 /**
57 * Invoked when the Window is set to be the focused Window, which means
58 * that the Window, or one of its subcomponents, will receive keyboard
59 * events.
60 * @param e the event to be processed
61 */
62 public void windowGainedFocus(WindowEvent e);
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22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.awt.event;
27
28 import java.util.EventListener;
29
30 /**
31 * The listener interface for receiving <code>WindowEvents</code>, including
32 * <code>WINDOW_GAINED_FOCUS</code> and <code>WINDOW_LOST_FOCUS</code> events.
33 * The class that is interested in processing a <code>WindowEvent</code>
34 * either implements this interface (and
35 * all the methods it contains) or extends the abstract
36 * <code>WindowAdapter</code> class (overriding only the methods of interest).
37 * The listener object created from that class is then registered with a
38 * <code>Window</code>
39 * using the <code>Window</code>'s <code>addWindowFocusListener</code> method.
40 * When the <code>Window</code>'s
41 * status changes by virtue of it being opened, closed, activated, deactivated,
42 * iconified, or deiconified, or by focus being transferred into or out of the
43 * <code>Window</code>, the relevant method in the listener object is invoked,
44 * and the <code>WindowEvent</code> is passed to it.
45 *
46 * @author David Mendenhall
47 *
48 * @see WindowAdapter
49 * @see WindowEvent
50 * @see <a href="http://docs.oracle.com/javase/tutorial/uiswing/events/windowlistener.html">Tutorial: Writing a Window Listener</a>
51 *
52 * @since 1.4
53 */
54 public interface WindowFocusListener extends EventListener {
55
56 /**
57 * Invoked when the Window is set to be the focused Window, which means
58 * that the Window, or one of its subcomponents, will receive keyboard
59 * events.
60 * @param e the event to be processed
61 */
62 public void windowGainedFocus(WindowEvent e);
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