1 /*
   2  * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.apple.laf;
  27 
  28 import java.awt.*;
  29 
  30 import javax.swing.*;
  31 import javax.swing.plaf.*;
  32 import javax.swing.plaf.basic.*;
  33 
  34 import sun.swing.SwingUtilities2;
  35 
  36 import com.apple.laf.AquaUtils.RecyclableSingleton;
  37 import com.apple.laf.AquaUtils.RecyclableSingletonFromDefaultConstructor;
  38 
  39 public class AquaLabelUI extends BasicLabelUI {
  40     protected static final  RecyclableSingleton<AquaLabelUI> aquaLabelUI = new RecyclableSingletonFromDefaultConstructor<AquaLabelUI>(AquaLabelUI.class);
  41 
  42     public static ComponentUI createUI(final JComponent c) {
  43         return aquaLabelUI.get();
  44     }
  45 
  46     protected void installListeners(final JLabel c) {
  47         super.installListeners(c);
  48         AquaUtilControlSize.addSizePropertyListener(c);
  49     }
  50 
  51     protected void uninstallListeners(final JLabel c) {
  52         AquaUtilControlSize.removeSizePropertyListener(c);
  53         super.uninstallListeners(c);
  54     }
  55 
  56     protected void paintEnabledText(final JLabel l, final Graphics g, final String s, final int textX, final int textY) {
  57         int mnemIndex = l.getDisplayedMnemonicIndex();
  58         if (AquaMnemonicHandler.isMnemonicHidden()) {
  59             mnemIndex = -1;
  60         }
  61 
  62         g.setColor(l.getForeground());
  63         SwingUtilities2.drawStringUnderlineCharAt(l, g, s, mnemIndex, textX, textY);
  64     }
  65 
  66     /**
  67      * Paint clippedText at textX, textY with background.lighter() and then
  68      * shifted down and to the right by one pixel with background.darker().
  69      *
  70      * @see #paint
  71      * @see #paintEnabledText
  72      */
  73     protected void paintDisabledText(final JLabel l, final Graphics g, final String s, final int textX, final int textY) {
  74         int accChar = l.getDisplayedMnemonicIndex();
  75         if (AquaMnemonicHandler.isMnemonicHidden()) {
  76             accChar = -1;
  77         }
  78 
  79         final Color background = l.getBackground();
  80 
  81         // if our background is still something we set then we can use our happy background color.
  82         if (background instanceof UIResource) {
  83             g.setColor(getDisabledLabelColor(l));
  84             SwingUtilities2.drawStringUnderlineCharAt(l, g, s, accChar, textX, textY);
  85         } else {
  86             super.paintDisabledText(l, g, s, textX, textY);
  87         }
  88     }
  89 
  90     static final String DISABLED_COLOR_KEY = "Label.disabledForegroundColor";
  91     protected Color getDisabledLabelColor(final JLabel label) {
  92         final Color fg = label.getForeground();
  93 
  94         final Object colorProperty = label.getClientProperty(DISABLED_COLOR_KEY);
  95         if (colorProperty instanceof Color) {
  96             final Color disabledColor = (Color)colorProperty;
  97             if ((fg.getRGB() << 8) == (disabledColor.getRGB() << 8)) return disabledColor;
  98         }
  99 
 100         final Color newDisabledColor = new Color(fg.getRed(), fg.getGreen(), fg.getBlue(), fg.getAlpha() / 2);
 101         label.putClientProperty(DISABLED_COLOR_KEY, newDisabledColor);
 102         return newDisabledColor;
 103     }
 104 }