1 /* 2 * Copyright (c) 1998, 2013, 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 javax.swing.plaf.metal; 27 28 import sun.swing.SwingUtilities2; 29 import sun.awt.AppContext; 30 31 import javax.swing.*; 32 import javax.swing.plaf.*; 33 import javax.swing.plaf.basic.*; 34 35 36 import java.awt.*; 37 38 39 /** 40 * A Windows L&F implementation of LabelUI. This implementation 41 * is completely static, i.e. there's only one UIView implementation 42 * that's shared by all JLabel objects. 43 * 44 * @author Hans Muller 45 */ 46 47 public class MetalLabelUI extends BasicLabelUI 48 { 49 /** 50 * The default <code>MetalLabelUI</code> instance. This field might 51 * not be used. To change the default instance use a subclass which 52 * overrides the <code>createUI</code> method, and place that class 53 * name in defaults table under the key "LabelUI". 54 */ 55 protected static MetalLabelUI metalLabelUI = new MetalLabelUI(); 56 57 private static final Object METAL_LABEL_UI_KEY = new Object(); 58 59 /** 60 * Returns an instance of {@code MetalLabelUI}. 61 * 62 * @param c a component 63 * @return an instance of {@code MetalLabelUI} 64 */ 65 public static ComponentUI createUI(JComponent c) { 66 if (System.getSecurityManager() != null) { 67 AppContext appContext = AppContext.getAppContext(); 68 MetalLabelUI safeMetalLabelUI = 69 (MetalLabelUI) appContext.get(METAL_LABEL_UI_KEY); 70 if (safeMetalLabelUI == null) { 71 safeMetalLabelUI = new MetalLabelUI(); 72 appContext.put(METAL_LABEL_UI_KEY, safeMetalLabelUI); 73 } 74 return safeMetalLabelUI; 75 } 76 return metalLabelUI; 77 } 78 79 /** 80 * Just paint the text gray (Label.disabledForeground) rather than 81 * in the labels foreground color. 82 * 83 * @see #paint 84 * @see #paintEnabledText 85 */ 86 protected void paintDisabledText(JLabel l, Graphics g, String s, int textX, int textY) 87 { 88 int mnemIndex = l.getDisplayedMnemonicIndex(); 89 g.setColor(UIManager.getColor("Label.disabledForeground")); 90 SwingUtilities2.drawStringUnderlineCharAt(l, g, s, mnemIndex, 91 textX, textY); 92 } 93 }