old-autovect-branch/libjava/classpath/javax/swing/plaf/basic/BasicRadioButtonUI.java

   1 /* BasicRadioButtonUI.java
   2    Copyright (C) 2002, 2004 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38
  39 package javax.swing.plaf.basic;
  40
  41 import java.awt.Color;
  42 import java.awt.Dimension;
  43 import java.awt.Font;
  44 import java.awt.Graphics;
  45 import java.awt.Rectangle;
  46
  47 import javax.swing.AbstractButton;
  48 import javax.swing.Icon;
  49 import javax.swing.JComponent;
  50 import javax.swing.SwingUtilities;
  51 import javax.swing.UIManager;
  52 import javax.swing.plaf.ComponentUI;
  53
  54 /**
  55  * The BasicLookAndFeel UI implementation for
  56  * {@link javax.swing.JRadioButton}s.
  57  */
  58 public class BasicRadioButtonUI extends BasicToggleButtonUI
  59 {
  60   /**
  61    * The default icon for JRadioButtons. The default icon displays the usual
  62    * RadioButton and is sensible to the selection state of the button,
  63    * and can be used both as normal icon as well as selectedIcon.
  64    */
  65   protected Icon icon;
  66
  67   /**
  68    * Creates and returns a new instance of <code>BasicRadioButtonUI</code>.
  69    *
  70    * @return a new instance of <code>BasicRadioButtonUI</code>
  71    */
  72   public static ComponentUI createUI(final JComponent c)  {
  73     return new BasicRadioButtonUI();
  74   }
  75
  76   /**
  77    * Creates a new instance of <code>BasicButtonUI</code>.
  78    */
  79   public BasicRadioButtonUI()
  80   {
  81     icon = getDefaultIcon();
  82   }
  83
  84   /**
  85    * Installs defaults from the Look &amp; Feel table on the specified
  86    * button.
  87    *
  88    * @param b the button on which to install the defaults
  89    */
  90   protected void installDefaults(AbstractButton b)
  91   {
  92     super.installDefaults(b);
  93     if (b.getIcon() == null)
  94       b.setIcon(icon);
  95     if (b.getSelectedIcon() == null)
  96       b.setSelectedIcon(icon);
  97     if (b.getDisabledIcon() == null)
  98       b.setDisabledIcon(icon);
  99     if (b.getDisabledSelectedIcon() == null)
 100       b.setDisabledSelectedIcon(icon);
 101   }
 102
 103   /**
 104    * Returns the prefix used for UIDefaults properties. This is
 105    * <code>RadioButton</code> in this case.
 106    *
 107    * @return the prefix used for UIDefaults properties
 108    */
 109   protected String getPropertyPrefix()
 110   {
 111     return "RadioButton.";
 112   }
 113
 114   /**
 115    * Returns the default icon for JRadioButtons.
 116    * The default icon displays the usual
 117    * RadioButton and is sensible to the selection state of the button,
 118    * and can be used both as normal icon as well as selectedIcon.
 119    *
 120    * @return the default icon for JRadioButtons
 121    */
 122   public Icon getDefaultIcon()
 123   {
 124     return UIManager.getIcon(getPropertyPrefix() + "icon");
 125   }
 126
 127   /**
 128    * Paints the RadioButton.
 129    *
 130    * @param g the Graphics context to paint with
 131    * @param c the button to paint
 132    */
 133   public void paint(Graphics g, JComponent c)
 134   {
 135     AbstractButton b = (AbstractButton) c;
 136
 137     Rectangle tr = new Rectangle();
 138     Rectangle ir = new Rectangle();
 139     Rectangle vr = new Rectangle();
 140
 141     Font f = c.getFont();
 142
 143     g.setFont(f);
 144
 145     Icon currentIcon = null;
 146     if (b.isSelected() && b.isEnabled())
 147       currentIcon = b.getSelectedIcon();
 148     else if (!b.isSelected() && b.isEnabled())
 149       currentIcon = b.getIcon();
 150     else if (b.isSelected() && !b.isEnabled())
 151       currentIcon = b.getDisabledSelectedIcon();
 152     else // (!b.isSelected() && !b.isEnabled())
 153       currentIcon = b.getDisabledIcon();
 154
 155     SwingUtilities.calculateInnerArea(b, vr);
 156     String text = SwingUtilities.layoutCompoundLabel
 157       (c, g.getFontMetrics(f), b.getText(), currentIcon,
 158        b.getVerticalAlignment(), b.getHorizontalAlignment(),
 159        b.getVerticalTextPosition(), b.getHorizontalTextPosition(),
 160        vr, ir, tr, b.getIconTextGap() + defaultTextShiftOffset);
 161
 162     if (currentIcon != null)
 163       {
 164         currentIcon.paintIcon(c, g, ir.x, ir.y);
 165       }
 166     if (text != null)
 167       paintText(g, b, tr, text);
 168     // TODO: Figure out what is the size parameter?
 169     if (b.hasFocus() && b.isFocusPainted() && b.isEnabled())
 170       paintFocus(g, tr, null);
 171   }
 172
 173   /**
 174    * Paints the focus indicator for JRadioButtons.
 175    *
 176    * @param g the graphics context
 177    * @param tr the rectangle for the text label
 178    * @param size the size (??)
 179    */
 180   // TODO: Figure out what for is the size parameter.
 181   protected void paintFocus(Graphics g, Rectangle tr, Dimension size)
 182   {
 183     Color focusColor = UIManager.getColor(getPropertyPrefix() + ".focus");
 184     Color saved = g.getColor();
 185     g.setColor(focusColor);
 186     g.drawRect(tr.x, tr.y, tr.width, tr.height);
 187     g.setColor(saved);
 188   }
 189 }