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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/awt/KeyEventPostProcessor.java
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+/* KeyEventPostProcessor.java -- performs actions after a key event dispatch
+ Copyright (C) 2002, 2005 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., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 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