82 lines
3.5 KiB
Java
82 lines
3.5 KiB
Java
/* KeyEventPostProcessor.java -- performs actions after a key event dispatch
|
|
Copyright (C) 2002 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA.
|
|
|
|
Linking this library statically or dynamically with other modules is
|
|
making a combined work based on this library. Thus, the terms and
|
|
conditions of the GNU General Public License cover the whole
|
|
combination.
|
|
|
|
As a special exception, the copyright holders of this library give you
|
|
permission to link this library with independent modules to produce an
|
|
executable, regardless of the license terms of these independent
|
|
modules, and to copy and distribute the resulting executable under
|
|
terms of your choice, provided that you also meet, for each linked
|
|
independent module, the terms and conditions of the license of that
|
|
module. An independent module is a module which is not derived from
|
|
or based on this library. If you modify this library, you may extend
|
|
this exception to your version of the library, but you are not
|
|
obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. */
|
|
|
|
|
|
package java.awt;
|
|
|
|
import java.awt.event.KeyEvent;
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* <p>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.
|
|
*
|
|
* @author Eric Blake <ebb9@email.byu.edu>
|
|
* @see KeyboardFocusManager#addKeyEventPostProcessor(KeyEventPostProcessor)
|
|
* @see KeyboardFocusManager#removeKeyEventPostProcessor(KeyEventPostProcessor)
|
|
* @since 1.4
|
|
* @status updated to 1.4
|
|
*/
|
|
public interface KeyEventPostProcessor
|
|
{
|
|
/**
|
|
* 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 <code>redispatchEvent</code>
|
|
* to avoid infinite recursion.
|
|
*
|
|
* <p>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.
|
|
*
|
|
* @param e the key event
|
|
* @return true if the event has been consumed
|
|
* @see KeyboardFocusManager#redispatchEvent(Component, AWTEvent)
|
|
*/
|
|
boolean postProcessKeyEvent(KeyEvent e);
|
|
} // interface KeyEventPostProcessor
|