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
26package com.apple.laf;
27
28import java.awt.*;
29
30import javax.swing.*;
31import javax.swing.plaf.*;
32import javax.swing.plaf.basic.*;
33
34import sun.swing.SwingUtilities2;
35
36import com.apple.laf.AquaUtils.RecyclableSingleton;
37import com.apple.laf.AquaUtils.RecyclableSingletonFromDefaultConstructor;
38
39public class AquaLabelUI extends BasicLabelUI {
40    private 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}
105