Java example source code file (MetalCheckBoxUI.java)

This example Java source code file (MetalCheckBoxUI.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

appcontext, awt, componentui, event, gui, metal_check_box_ui_key, metalcheckboxui, metalradiobuttonui, object, plaf, string, swing

The MetalCheckBoxUI.java Java example source code

/*
 * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package javax.swing.plaf.metal;

import sun.awt.AppContext;

import javax.swing.*;
import javax.swing.plaf.basic.BasicCheckBoxUI;

import java.awt.*;
import java.awt.event.*;
import javax.swing.plaf.*;
import java.io.Serializable;


/**
 * CheckboxUI implementation for MetalCheckboxUI
 * <p>
 * <strong>Warning:
 * Serialized objects of this class will not be compatible with
 * future Swing releases. The current serialization support is
 * appropriate for short term storage or RMI between applications running
 * the same version of Swing.  As of 1.4, support for long term storage
 * of all JavaBeans™
 * has been added to the <code>java.beans package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @author Michael C. Albers
 *
 */
public class MetalCheckBoxUI extends MetalRadioButtonUI {

    // NOTE: MetalCheckBoxUI inherts from MetalRadioButtonUI instead
    // of BasicCheckBoxUI because we want to pick up all the
    // painting changes made in MetalRadioButtonUI.

    private static final Object METAL_CHECK_BOX_UI_KEY = new Object();

    private final static String propertyPrefix = "CheckBox" + ".";

    private boolean defaults_initialized = false;

    // ********************************
    //         Create PlAF
    // ********************************
    public static ComponentUI createUI(JComponent b) {
        AppContext appContext = AppContext.getAppContext();
        MetalCheckBoxUI checkboxUI =
                (MetalCheckBoxUI) appContext.get(METAL_CHECK_BOX_UI_KEY);
        if (checkboxUI == null) {
            checkboxUI = new MetalCheckBoxUI();
            appContext.put(METAL_CHECK_BOX_UI_KEY, checkboxUI);
        }
        return checkboxUI;
    }

    public String getPropertyPrefix() {
        return propertyPrefix;
    }

    // ********************************
    //          Defaults
    // ********************************
    public void installDefaults(AbstractButton b) {
        super.installDefaults(b);
        if(!defaults_initialized) {
            icon = UIManager.getIcon(getPropertyPrefix() + "icon");
            defaults_initialized = true;
        }
    }

    protected void uninstallDefaults(AbstractButton b) {
        super.uninstallDefaults(b);
        defaults_initialized = false;
    }

}