001    /* MetalLabelUI.java
002       Copyright (C) 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.plaf.metal;
040    
041    import java.awt.Color;
042    import java.awt.Graphics;
043    
044    import javax.swing.JComponent;
045    import javax.swing.JLabel;
046    import javax.swing.UIManager;
047    import javax.swing.plaf.ComponentUI;
048    import javax.swing.plaf.basic.BasicGraphicsUtils;
049    import javax.swing.plaf.basic.BasicLabelUI;
050    
051    /**
052     * A UI delegate for the {@link JLabel} component.
053     */
054    public class MetalLabelUI
055      extends BasicLabelUI
056    {
057    
058      /** The shared instance of the UI delegate. */
059      protected static MetalLabelUI metalLabelUI;
060    
061      /**
062       * Constructs a new instance of <code>MetalLabelUI</code>.
063       */
064      public MetalLabelUI()
065      {
066        super();
067      }
068    
069      /**
070       * Returns a shared instance of <code>MetalLabelUI</code>.
071       *
072       * @param component the component for which we return an UI instance
073       *
074       * @return A shared instance of <code>MetalLabelUI</code>.
075       */
076      public static ComponentUI createUI(JComponent component)
077      {
078        if (metalLabelUI == null)
079          metalLabelUI = new MetalLabelUI();
080        return metalLabelUI;
081      }
082      
083      /**
084       * Draws the text for a disabled label, using the color defined in the 
085       * {@link UIManager} defaults with the key
086       * <code>Label.disabledForeground</code>.
087       * 
088       * @param l  the label.
089       * @param g  the graphics device.
090       * @param s  the label text.
091       * @param textX  the x-coordinate for the label.
092       * @param textY  the y-coordinate for the label.
093       */
094      protected void paintDisabledText(JLabel l, Graphics g, String s, int textX,
095                                     int textY)
096      {
097        Color savedColor = g.getColor();
098        g.setColor(UIManager.getColor("Label.disabledForeground"));
099        int mnemIndex = l.getDisplayedMnemonicIndex();
100        if (mnemIndex != -1)
101          BasicGraphicsUtils.drawStringUnderlineCharAt(g, s, mnemIndex, textX,
102              textY);
103        else
104          g.drawString(s, textX, textY);
105    
106        g.setColor(savedColor);
107      }
108    }