1 /* 2 * Copyright (c) 1997, 2014, 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.basic; 27 28 import sun.awt.AppContext; 29 30 import javax.swing.*; 31 32 import java.awt.*; 33 import java.awt.event.*; 34 import javax.swing.plaf.*; 35 import java.io.Serializable; 36 37 38 /** 39 * CheckboxUI implementation for BasicCheckboxUI 40 * <p> 41 * <strong>Warning:</strong> 42 * Serialized objects of this class will not be compatible with 43 * future Swing releases. The current serialization support is 44 * appropriate for short term storage or RMI between applications running 45 * the same version of Swing. As of 1.4, support for long term storage 46 * of all JavaBeans™ 47 * has been added to the <code>java.beans</code> package. 48 * Please see {@link java.beans.XMLEncoder}. 49 * 50 * @author Jeff Dinkins 51 */ 52 @SuppressWarnings("serial") // Same-version serialization only 53 public class BasicCheckBoxUI extends BasicRadioButtonUI { 54 55 private static final Object BASIC_CHECK_BOX_UI_KEY = new Object(); 56 57 private static final String propertyPrefix = "CheckBox" + "."; 58 59 // ******************************** 60 // Create PLAF 61 // ******************************** 62 63 /** 64 * Returns an instance of {@code BasicCheckBoxUI}. 65 * 66 * @param b a component 67 * @return an instance of {@code BasicCheckBoxUI} 68 */ 69 public static ComponentUI createUI(JComponent b) { 70 AppContext appContext = AppContext.getAppContext(); 71 BasicCheckBoxUI checkboxUI = 72 (BasicCheckBoxUI) appContext.get(BASIC_CHECK_BOX_UI_KEY); 73 if (checkboxUI == null) { 74 checkboxUI = new BasicCheckBoxUI(); 75 appContext.put(BASIC_CHECK_BOX_UI_KEY, checkboxUI); 76 } 77 return checkboxUI; 78 } 79 80 public String getPropertyPrefix() { 81 return propertyPrefix; 82 } 83 84 }