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
26package javax.swing.plaf.basic;
27
28import sun.awt.AppContext;
29
30import javax.swing.*;
31
32import java.awt.*;
33import java.awt.event.*;
34import javax.swing.plaf.*;
35import 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&trade;
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
53public 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}
85