001    /* WindowListener.java -- listens for window events
002       Copyright (C) 1999, 2002, 2005  Free Software Foundation, Inc.
003    
004    This file is part of GNU Classpath.
005    
006    GNU Classpath is free software; you can redistribute it and/or modify
007    it under the terms of the GNU General Public License as published by
008    the Free Software Foundation; either version 2, or (at your option)
009    any later version.
010    
011    GNU Classpath is distributed in the hope that it will be useful, but
012    WITHOUT ANY WARRANTY; without even the implied warranty of
013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014    General Public License for more details.
015    
016    You should have received a copy of the GNU General Public License
017    along with GNU Classpath; see the file COPYING.  If not, write to the
018    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019    02110-1301 USA.
020    
021    Linking this library statically or dynamically with other modules is
022    making a combined work based on this library.  Thus, the terms and
023    conditions of the GNU General Public License cover the whole
024    combination.
025    
026    As a special exception, the copyright holders of this library give you
027    permission to link this library with independent modules to produce an
028    executable, regardless of the license terms of these independent
029    modules, and to copy and distribute the resulting executable under
030    terms of your choice, provided that you also meet, for each linked
031    independent module, the terms and conditions of the license of that
032    module.  An independent module is a module which is not derived from
033    or based on this library.  If you modify this library, you may extend
034    this exception to your version of the library, but you are not
035    obligated to do so.  If you do not wish to do so, delete this
036    exception statement from your version. */
037    
038    
039    package java.awt.event;
040    
041    import java.awt.Frame;
042    import java.awt.Image;
043    import java.util.EventListener;
044    
045    /**
046     * This interface is for classes that wish to monitor events for window
047     * changes. To watch a subset of these events, use a WindowAdapter.
048     *
049     * @author Aaron M. Renn (arenn@urbanophile.com)
050     * @see WindowAdapter
051     * @see WindowEvent
052     * @since 1.1
053     * @status updated to 1.4
054     */
055    public interface WindowListener extends EventListener
056    {
057      /**
058       * This method is called when the window is made visible.
059       *
060       * @param event the <code>WindowEvent</code> indicating the change
061       */
062      void windowOpened(WindowEvent event);
063    
064      /**
065       * This method is called when the user calls the system menu close
066       * function, giving the program a chance to cancel the close.
067       *
068       * @param event the <code>WindowEvent</code> indicating the close attempt
069       */
070      void windowClosing(WindowEvent event);
071    
072      /**
073       * This method is called when the window is closed.
074       *
075       * @param event the <code>WindowEvent</code> indicating the dispose
076       */
077      void windowClosed(WindowEvent event);
078    
079      /**
080       * This method is called when the window is iconified.
081       *
082       * @param event the <code>WindowEvent</code> indicating the iconification
083       * @see Frame#setIconImage(Image)
084       */
085      void windowIconified(WindowEvent event);
086    
087      /**
088       * This method is called when the window is deiconified.
089       *
090       * @param event the <code>WindowEvent</code> indicating the deiconification
091       */
092      void windowDeiconified(WindowEvent event);
093    
094      /**
095       * This method is called when a window is activated. Only Frames and Dialogs
096       * can be active, and the active window always contains the component with
097       * focus.
098       *
099       * @param event the <code>WindowEvent</code> indicating the activation
100       */
101      void windowActivated(WindowEvent event);
102    
103      /**
104       * This method is called when the window is deactivated.
105       *
106       * @param event the <code>WindowEvent</code> indicating the deactivation
107       */
108      void windowDeactivated(WindowEvent event);
109    } // interface WindowListener