WindowFocusListener
implements EventListener| java.awt.event.WindowFocusListener |
 Known Indirect Subclasses
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Class Overview
The listener interface for receiving WindowEvents, including
WINDOW_GAINED_FOCUS and WINDOW_LOST_FOCUS events.
The class that is interested in processing a WindowEvent
either implements this interface (and
all the methods it contains) or extends the abstract
WindowAdapter class (overriding only the methods of interest).
The listener object created from that class is then registered with a
Window
using the Window's addWindowFocusListener method.
When the Window's
status changes by virtue of it being opened, closed, activated, deactivated,
iconified, or deiconified, or by focus being transfered into or out of the
Window, the relevant method in the listener object is invoked,
and the WindowEvent is passed to it.
Summary
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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.
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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.
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Public Methods
public abstract void windowGainedFocus (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.
public abstract void windowLostFocus (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.