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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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,
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 *
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package javax.swing.plaf.metal;

import sun.swing.SwingUtilities2;
import sun.awt.AppContext;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.plaf.basic.*;
import javax.swing.border.*;
import javax.swing.plaf.*;
import java.io.Serializable;
import javax.swing.text.View;


RadioButtonUI implementation for MetalRadioButtonUI

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 java.beans package. Please see XMLEncoder. 
Author:
Michael C. Albers (Metal modifications), Jeff Dinkins (original BasicRadioButtonCode)/**
 * RadioButtonUI implementation for MetalRadioButtonUI
 * <p>
 * <strong>Warning:</strong>
 * 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</code> package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @author Michael C. Albers (Metal modifications)
 * @author Jeff Dinkins (original BasicRadioButtonCode)
 */
@SuppressWarnings("serial") // Same-version serialization only
public class MetalRadioButtonUI extends BasicRadioButtonUI {

    private static final Object METAL_RADIO_BUTTON_UI_KEY = new Object();

    
The color of the focused radio button.
/**
     * The color of the focused radio button.
     */
    protected Color focusColor;

    
The color of the selected radio button.
/**
     * The color of the selected radio button.
     */
    protected Color selectColor;

    
The color of a disabled text.
/**
     * The color of a disabled text.
     */
    protected Color disabledTextColor;

    private boolean defaults_initialized = false;

    // ********************************
    //        Create PlAF
    // ********************************

    
Constructs a MetalRadioButtonUI. /**
     * Constructs a {@code MetalRadioButtonUI}.
     */
    public MetalRadioButtonUI() {}

    
Returns an instance of MetalRadioButtonUI. 
Params:
c – a component
Returns:
an instance of MetalRadioButtonUI/**
     * Returns an instance of {@code MetalRadioButtonUI}.
     *
     * @param c a component
     * @return an instance of {@code MetalRadioButtonUI}
     */
    public static ComponentUI createUI(JComponent c) {
        AppContext appContext = AppContext.getAppContext();
        MetalRadioButtonUI metalRadioButtonUI =
                (MetalRadioButtonUI) appContext.get(METAL_RADIO_BUTTON_UI_KEY);
        if (metalRadioButtonUI == null) {
            metalRadioButtonUI = new MetalRadioButtonUI();
            appContext.put(METAL_RADIO_BUTTON_UI_KEY, metalRadioButtonUI);
        }
        return metalRadioButtonUI;
    }

    // ********************************
    //        Install Defaults
    // ********************************
    public void installDefaults(AbstractButton b) {
        super.installDefaults(b);
        if(!defaults_initialized) {
            focusColor = UIManager.getColor(getPropertyPrefix() + "focus");
            selectColor = UIManager.getColor(getPropertyPrefix() + "select");
            disabledTextColor = UIManager.getColor(getPropertyPrefix() + "disabledText");
            defaults_initialized = true;
        }
        LookAndFeel.installProperty(b, "opaque", Boolean.TRUE);
    }

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

    // ********************************
    //         Default Accessors
    // ********************************

    
Returns the color of the selected JRadioButton. 
Returns:
the color of the selected JRadioButton/**
     * Returns the color of the selected {@code JRadioButton}.
     *
     * @return the color of the selected {@code JRadioButton}
     */
    protected Color getSelectColor() {
        return selectColor;
    }

    
Returns the color of the disabled text.
Returns:
the color of the disabled text/**
     * Returns the color of the disabled text.
     *
     * @return the color of the disabled text
     */
    protected Color getDisabledTextColor() {
        return disabledTextColor;
    }

    
Returns the color of the focused JRadioButton. 
Returns:
the color of the focused JRadioButton/**
     * Returns the color of the focused {@code JRadioButton}.
     *
     * @return the color of the focused {@code JRadioButton}
     */
    protected Color getFocusColor() {
        return focusColor;
    }


    // ********************************
    //        Paint Methods
    // ********************************
    public synchronized void paint(Graphics g, JComponent c) {

        AbstractButton b = (AbstractButton) c;
        ButtonModel model = b.getModel();

        Dimension size = c.getSize();

        int w = size.width;
        int h = size.height;

        Font f = c.getFont();
        g.setFont(f);
        FontMetrics fm = SwingUtilities2.getFontMetrics(c, g, f);

        Rectangle viewRect = new Rectangle(size);
        Rectangle iconRect = new Rectangle();
        Rectangle textRect = new Rectangle();

        Insets i = c.getInsets();
        viewRect.x += i.left;
        viewRect.y += i.top;
        viewRect.width -= (i.right + viewRect.x);
        viewRect.height -= (i.bottom + viewRect.y);

        Icon altIcon = b.getIcon();
        Icon selectedIcon = null;
        Icon disabledIcon = null;

        String text = SwingUtilities.layoutCompoundLabel(
            c, fm, b.getText(), altIcon != null ? altIcon : getDefaultIcon(),
            b.getVerticalAlignment(), b.getHorizontalAlignment(),
            b.getVerticalTextPosition(), b.getHorizontalTextPosition(),
            viewRect, iconRect, textRect, b.getIconTextGap());

        // fill background
        if(c.isOpaque()) {
            g.setColor(b.getBackground());
            g.fillRect(0,0, size.width, size.height);
        }


        // Paint the radio button
        if(altIcon != null) {

            if(!model.isEnabled()) {
                if(model.isSelected()) {
                   altIcon = b.getDisabledSelectedIcon();
                } else {
                   altIcon = b.getDisabledIcon();
                }
            } else if(model.isPressed() && model.isArmed()) {
                altIcon = b.getPressedIcon();
                if(altIcon == null) {
                    // Use selected icon
                    altIcon = b.getSelectedIcon();
                }
            } else if(model.isSelected()) {
                if(b.isRolloverEnabled() && model.isRollover()) {
                        altIcon = b.getRolloverSelectedIcon();
                        if (altIcon == null) {
                                altIcon = b.getSelectedIcon();
                        }
                } else {
                        altIcon = b.getSelectedIcon();
                }
            } else if(b.isRolloverEnabled() && model.isRollover()) {
                altIcon = b.getRolloverIcon();
            }

            if(altIcon == null) {
                altIcon = b.getIcon();
            }

            altIcon.paintIcon(c, g, iconRect.x, iconRect.y);

        } else {
            getDefaultIcon().paintIcon(c, g, iconRect.x, iconRect.y);
        }


        // Draw the Text
        if(text != null) {
            View v = (View) c.getClientProperty(BasicHTML.propertyKey);
            if (v != null) {
                v.paint(g, textRect);
            } else {
               int mnemIndex = b.getDisplayedMnemonicIndex();
               if(model.isEnabled()) {
                   // *** paint the text normally
                   g.setColor(b.getForeground());
               } else {
                   // *** paint the text disabled
                   g.setColor(getDisabledTextColor());
               }
               SwingUtilities2.drawStringUnderlineCharAt(c,g,text,
                       mnemIndex, textRect.x, textRect.y + fm.getAscent());
           }
           if(b.hasFocus() && b.isFocusPainted() &&
              textRect.width > 0 && textRect.height > 0 ) {
               paintFocus(g,textRect,size);
           }
        }
    }

    protected void paintFocus(Graphics g, Rectangle t, Dimension d){
        g.setColor(getFocusColor());
        g.drawRect(t.x-1, t.y-1, t.width+1, t.height+1);
    }
}