Source Code Cross Referenced for KeyEventPostProcessor.java in  » 6.0-JDK-Core » AWT » java » awt » Java Source Code / Java DocumentationJava Source Code and Java Documentation

Home
Java Source Code / Java Documentation
1.6.0 JDK Core
2.6.0 JDK Modules
3.6.0 JDK Modules com.sun
4.6.0 JDK Modules com.sun.java
5.6.0 JDK Modules sun
6.6.0 JDK Platform
7.Ajax
8.Apache Harmony Java SE
9.Aspect oriented
10.Authentication Authorization
11.Blogger System
12.Build
13.Byte Code
14.Cache
15.Chart
16.Chat
17.Code Analyzer
18.Collaboration
19.Content Management System
20.Database Client
21.Database DBMS
22.Database JDBC Connection Pool
23.Database ORM
24.Development
25.EJB Server
26.ERP CRM Financial
27.ESB
28.Forum
29.Game
30.GIS
31.Graphic 3D
32.Graphic Library
33.Groupware
34.HTML Parser
35.IDE
36.IDE Eclipse
37.IDE Netbeans
38.Installer
39.Internationalization Localization
40.Inversion of Control
41.Issue Tracking
42.J2EE
43.J2ME
44.JBoss
45.JMS
46.JMX
47.Library
48.Mail Clients
49.Music
50.Net
51.Parser
52.PDF
53.Portal
54.Profiler
55.Project Management
56.Report
57.RSS RDF
58.Rule Engine
59.Science
60.Scripting
61.Search Engine
62.Security
63.Sevlet Container
64.Source Control
65.Swing Library
66.Template Engine
67.Test Coverage
68.Testing
69.UML
70.Web Crawler
71.Web Framework
72.Web Mail
73.Web Server
74.Web Services
75.Web Services apache cxf 2.2.6
76.Web Services AXIS2
77.Wiki Engine
78.Workflow Engines
79.XML
80.XML UI
Java Source Code / Java Documentation » 6.0 JDK Core » AWT » java.awt 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01        /*
02         * Copyright 2001 Sun Microsystems, Inc.  All Rights Reserved.
03         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04         *
05         * This code is free software; you can redistribute it and/or modify it
06         * under the terms of the GNU General Public License version 2 only, as
07         * published by the Free Software Foundation.  Sun designates this
08         * particular file as subject to the "Classpath" exception as provided
09         * by Sun in the LICENSE file that accompanied this code.
10         *
11         * This code is distributed in the hope that it will be useful, but WITHOUT
12         * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13         * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14         * version 2 for more details (a copy is included in the LICENSE file that
15         * accompanied this code).
16         *
17         * You should have received a copy of the GNU General Public License version
18         * 2 along with this work; if not, write to the Free Software Foundation,
19         * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20         *
21         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22         * CA 95054 USA or visit www.sun.com if you need additional information or
23         * have any questions.
24         */
25        package java.awt;
26
27        import java.awt.event.KeyEvent;
28
29        /**
30         * A KeyEventPostProcessor cooperates with the current KeyboardFocusManager
31         * in the final resolution of all unconsumed KeyEvents. KeyEventPostProcessors
32         * registered with the current KeyboardFocusManager will receive KeyEvents
33         * after the KeyEvents have been dispatched to and handled by their targets.
34         * KeyEvents that would have been otherwise discarded because no Component in
35         * the application currently owns the focus will also be forwarded to
36         * registered KeyEventPostProcessors. This will allow applications to implement
37         * features that require global KeyEvent post-handling, such as menu shortcuts.
38         * <p>
39         * Note that the KeyboardFocusManager itself implements KeyEventPostProcessor.
40         * By default, the current KeyboardFocusManager will be the final
41         * KeyEventPostProcessor in the chain. The current KeyboardFocusManager cannot
42         * be completely deregistered as a KeyEventPostProcessor. However, if a
43         * KeyEventPostProcessor reports that no further post-processing of the
44         * KeyEvent should take place, the AWT will consider the event fully handled
45         * and will take no additional action with regard to the event. (While it is
46         * possible for client code to register the current KeyboardFocusManager as
47         * a KeyEventPostProcessor one or more times, this is usually unnecessary and
48         * not recommended.)
49         *
50         * @author David Mendenhall
51         * @version 1.12, 05/05/07
52         *
53         * @see KeyboardFocusManager#addKeyEventPostProcessor
54         * @see KeyboardFocusManager#removeKeyEventPostProcessor
55         * @since 1.4
56         */
57        public interface KeyEventPostProcessor {
58
59            /**
60             * This method is called by the current KeyboardFocusManager, requesting
61             * that this KeyEventPostProcessor perform any necessary post-processing
62             * which should be part of the KeyEvent's final resolution. At the time
63             * this method is invoked, typically the KeyEvent has already been
64             * dispatched to and handled by its target. However, if no Component in
65             * the application currently owns the focus, then the KeyEvent has not
66             * been dispatched to any Component. Typically, KeyEvent post-processing
67             * will be used to implement features which require global KeyEvent
68             * post-handling, such as menu shortcuts. Note that if a
69             * KeyEventPostProcessor wishes to dispatch the KeyEvent, it must use
70             * <code>redispatchEvent</code> to prevent the AWT from recursively
71             * requesting that this KeyEventPostProcessor perform post-processing
72             * of the event again.
73             * <p>
74             * If an implementation of this method returns <code>false</code>, then the
75             * KeyEvent is passed to the next KeyEventPostProcessor in the chain,
76             * ending with the current KeyboardFocusManager. If an implementation
77             * returns <code>true</code>, the KeyEvent is assumed to have been fully
78             * handled (although this need not be the case), and the AWT will take no
79             * further action with regard to the KeyEvent. If an implementation
80             * consumes the KeyEvent but returns <code>false</code>, the consumed
81             * event will still be passed to the next KeyEventPostProcessor in the
82             * chain. It is important for developers to check whether the KeyEvent has
83             * been consumed before performing any post-processing of the KeyEvent. By
84             * default, the current KeyboardFocusManager will perform no post-
85             * processing in response to a consumed KeyEvent.
86             *
87             * @param e the KeyEvent to post-process
88             * @return <code>true</code> if the AWT should take no further action with
89             *         regard to the KeyEvent; <code>false</code> otherwise
90             * @see KeyboardFocusManager#redispatchEvent
91             */
92            boolean postProcessKeyEvent(KeyEvent e);
93        }
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.