001    /* JApplet.java --
002       Copyright (C) 2002, 2004, 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 javax.swing;
040    
041    import java.applet.Applet;
042    import java.awt.BorderLayout;
043    import java.awt.Component;
044    import java.awt.Container;
045    import java.awt.Dimension;
046    import java.awt.Graphics;
047    import java.awt.LayoutManager;
048    import java.awt.event.KeyEvent;
049    
050    import javax.accessibility.Accessible;
051    import javax.accessibility.AccessibleContext;
052    
053    /**
054     * A top-level container that is usually used in web browsers.
055     *
056     * @author original author unknown
057     */
058    public class JApplet extends Applet
059      implements RootPaneContainer, Accessible
060    {
061      /**
062       * Provides accessibility support for <code>JApplet</code>.
063       */
064      protected class AccessibleJApplet extends Applet.AccessibleApplet
065      {
066        /**
067         * Creates a new instance of <code>AccessibleJApplet</code>.
068         */
069        protected AccessibleJApplet()
070        {
071          super();
072          // Nothing to do here.
073        }
074      }
075    
076      /**
077       * The accessible context for this <code>JApplet</code>.
078       */
079      protected AccessibleContext accessibleContext;
080    
081      private static final long serialVersionUID = 7269359214497372587L;
082    
083      protected JRootPane rootPane;
084    
085      /**
086       * @specnote rootPaneCheckingEnabled is false to comply with J2SE 5.0
087       */
088      protected boolean rootPaneCheckingEnabled = false;
089    
090      public JApplet()
091      {
092        super.setLayout(new BorderLayout(1, 1));
093        getRootPane(); // Will do set/create.
094        setRootPaneCheckingEnabled(true); // Init stage is now over.
095      }
096    
097      public Dimension getPreferredSize()
098      {
099        return super.getPreferredSize();
100      }
101    
102      public void setLayout(LayoutManager manager)
103      {
104        // Check if we're in initialization stage.  If so, call super.setLayout
105        // otherwise, valid calls go to the content pane
106        if (isRootPaneCheckingEnabled())
107          getContentPane().setLayout(manager);
108        else
109          super.setLayout(manager);
110      }
111    
112      public void setLayeredPane(JLayeredPane layeredPane)
113      {
114        getRootPane().setLayeredPane(layeredPane);
115      }
116    
117      public JLayeredPane getLayeredPane()
118      {
119        return getRootPane().getLayeredPane();
120      }
121    
122      public JRootPane getRootPane()
123      {
124        if (rootPane == null)
125          setRootPane(createRootPane());
126        return rootPane;
127      }
128    
129      protected void setRootPane(JRootPane root)
130      {
131        if (rootPane != null)
132          remove(rootPane);
133    
134        rootPane = root;
135        add(rootPane, BorderLayout.CENTER);
136      }
137    
138      protected JRootPane createRootPane()
139      {
140        return new JRootPane();
141      }
142    
143      public Container getContentPane()
144      {
145        return getRootPane().getContentPane();
146      }
147    
148      public void setContentPane(Container contentPane)
149      {
150        getRootPane().setContentPane(contentPane);
151      }
152    
153      public Component getGlassPane()
154      {
155        return getRootPane().getGlassPane();
156      }
157    
158      public void setGlassPane(Component glassPane)
159      {
160        getRootPane().setGlassPane(glassPane);
161      }
162    
163      protected void addImpl(Component comp, Object constraints, int index)
164      {
165        // If we're adding in the initialization stage use super.add.
166        // Otherwise pass the add onto the content pane.
167        if (isRootPaneCheckingEnabled())
168          getContentPane().add(comp, constraints, index);
169        else
170          super.addImpl(comp, constraints, index);
171      }
172    
173      public AccessibleContext getAccessibleContext()
174      {
175        if (accessibleContext == null)
176          accessibleContext = new AccessibleJApplet();
177        return accessibleContext;
178      }
179    
180      public JMenuBar getJMenuBar()
181      {
182        return getRootPane().getJMenuBar();
183      }
184    
185      public void setJMenuBar(JMenuBar menubar)
186      {
187        getRootPane().setJMenuBar(menubar);
188      }
189    
190      protected String paramString()
191      {
192        return super.paramString();
193      }
194    
195      protected void processKeyEvent(KeyEvent e)
196      {
197        super.processKeyEvent(e);
198      }
199    
200      public void remove(Component comp)
201      {
202        // If we're removing the root pane, use super.remove. Otherwise
203        // pass it on to the content pane instead
204        if (comp == rootPane)
205          super.remove(rootPane);
206        else
207          getContentPane().remove(comp);
208      }
209    
210      protected boolean isRootPaneCheckingEnabled()
211      {
212        return rootPaneCheckingEnabled;
213      }
214    
215      protected void setRootPaneCheckingEnabled(boolean enabled)
216      {
217        rootPaneCheckingEnabled = enabled;
218      }
219    
220      public void update(Graphics g)
221      {
222        paint(g);
223      }
224    }