001    /* BasicToggleButtonUI.java
002       Copyright (C) 2002, 2004, 2005, 2006, 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.plaf.basic;
040    
041    import java.awt.Font;
042    import java.awt.Graphics;
043    import java.awt.Rectangle;
044    
045    import javax.swing.AbstractButton;
046    import javax.swing.JComponent;
047    import javax.swing.JToggleButton;
048    import javax.swing.SwingUtilities;
049    import javax.swing.UIManager;
050    import javax.swing.plaf.ComponentUI;
051    
052    /**
053     * A UI delegate for the {@link JToggleButton} component.
054     */
055    public class BasicToggleButtonUI extends BasicButtonUI
056    {
057      
058      /**
059       * Returns a UI delegate for the specified component.
060       * 
061       * @param component  the component (should be an instance of 
062       *     {@link JToggleButton}).
063       *     
064       * @return An instance of <code>BasicToggleButtonUI</code>.
065       */
066      public static ComponentUI createUI(JComponent component)
067      {
068        return new BasicToggleButtonUI();
069      }    
070    
071      /**
072       * Returns the prefix for entries in the {@link UIManager} defaults table 
073       * (<code>"ToggleButton."</code> in this case).
074       *
075       * @return <code>"ToggleButton."</code>
076       */
077      protected String getPropertyPrefix()
078      {
079        return "ToggleButton.";
080      }
081    
082      /**
083       * Paint the component, which is an {@link AbstractButton}, according to 
084       * its current state.
085       *
086       * @param g The graphics context to paint with
087       * @param c The component to paint the state of
088       */
089      public void paint(Graphics g, JComponent c)
090      {      
091        AbstractButton b = (AbstractButton) c;
092    
093        Rectangle tr = new Rectangle();
094        Rectangle ir = new Rectangle();
095        Rectangle vr = new Rectangle();
096    
097        Font f = c.getFont();
098    
099        g.setFont(f);
100    
101        if (b.isBorderPainted())
102          SwingUtilities.calculateInnerArea(b, vr);
103        else
104          vr = SwingUtilities.getLocalBounds(b);
105        String text = SwingUtilities.layoutCompoundLabel(c, g.getFontMetrics(f), 
106            b.getText(), currentIcon(b), b.getVerticalAlignment(), 
107            b.getHorizontalAlignment(), b.getVerticalTextPosition(), 
108            b.getHorizontalTextPosition(), vr, ir, tr, b.getIconTextGap() 
109            + defaultTextShiftOffset);
110    
111        if ((b.getModel().isArmed() && b.getModel().isPressed()) 
112            || b.isSelected())
113          paintButtonPressed(g, b);
114    
115        paintIcon(g, b, ir);
116        if (text != null)
117          paintText(g, b, tr, text);
118        if (b.isFocusOwner() && b.isFocusPainted())
119          paintFocus(g, b, vr, tr, ir);
120      }
121    
122      /**
123       * Paints the icon for the toggle button. This delegates to
124       * {@link BasicButtonUI#paintIcon(Graphics, JComponent, Rectangle)}.
125       *
126       * @param g the graphics context
127       * @param b the button to paint the icon for
128       * @param iconRect the area allocated for the icon
129       */
130      protected void paintIcon(Graphics g, AbstractButton b, Rectangle iconRect)
131      {
132        super.paintIcon(g, b, iconRect);
133      }
134    }