java.awt
Interface KeyEventPostProcessor
- DefaultFocusManager, DefaultKeyboardFocusManager, FocusManager, KeyboardFocusManager
An instance of this interface coordinates with a KeyboardFocusManager to
target and dispatch all key events that are otherwise unconsumed. This
allows events which take place when nothing has focus to still operate,
such as menu keyboard shortcuts.
By default, the KeyboardFocusManager is the sink for all key events not
post-processed elsewhere. Therefore, it is unnecessary for the user
to register the focus manager as a dispatcher.
postProcessKeyEvent
public boolean postProcessKeyEvent(KeyEvent e)
Called by the KeyboardFocusManager to request that a key event be
post-processed. Typically, the event has already been dispatched and
handled, unless no object has focus. Thus, this allows global event
handling for things like menu shortcuts. If this post-processor chooses
to dispatch the event, it should call
redispatchEvent
to avoid infinite recursion.
If the return value is false, the KeyEvent is passed to the next
dispatcher in the chain, ending with the KeyboardFocusManager. If the
return value is true, the event has been consumed (although it might
have been ignored), and no further action will be taken on the event. Be
sure to check whether the event was consumed before dispatching it
further.
- true if the event has been consumed
KeyEventPostProcessor.java -- performs actions after a key event dispatch
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