/*

 * Copyright 1997-2008 Sun Microsystems, Inc.  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.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

package javax.swing.plaf.basic;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.border.*;

import javax.swing.plaf.*;

import javax.swing.text.View;

import sun.swing.SwingUtilities2;

/**

 * RadioButtonUI implementation for BasicRadioButtonUI

 *

 * @author Jeff Dinkins

 */

public class BasicRadioButtonUI extends BasicToggleButtonUI

{

    private final static BasicRadioButtonUI radioButtonUI = new BasicRadioButtonUI();

    protected Icon icon;

    private boolean defaults_initialized = false;

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

    // ********************************

    //        Create PLAF

    // ********************************

    public static ComponentUI createUI(JComponent b) {

        return radioButtonUI;

    }

    protected String getPropertyPrefix() {

        return propertyPrefix;

    }

    // ********************************

    //        Install PLAF

    // ********************************

    protected void installDefaults(AbstractButton b){

        super.installDefaults(b);

        if(!defaults_initialized) {

            icon = UIManager.getIcon(getPropertyPrefix() + "icon");

            defaults_initialized = true;

        }

    }

    // ********************************

    //        Uninstall PLAF

    // ********************************

    protected void uninstallDefaults(AbstractButton b){

        super.uninstallDefaults(b);

        defaults_initialized = false;

    }

    public Icon getDefaultIcon() {

        return icon;

    }

    /* These Dimensions/Rectangles are allocated once for all

     * RadioButtonUI.paint() calls.  Re-using rectangles

     * rather than allocating them in each paint call substantially

     * reduced the time it took paint to run.  Obviously, this

     * method can't be re-entered.

     */

    private static Dimension size = new Dimension();

    private static Rectangle viewRect = new Rectangle();

    private static Rectangle iconRect = new Rectangle();

    private static Rectangle textRect = new Rectangle();

    /**

     * paint the radio button

     */

    public synchronized void paint(Graphics g, JComponent c) {

        AbstractButton b = (AbstractButton) c;

        ButtonModel model = b.getModel();

        Font f = c.getFont();

        g.setFont(f);

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

        Insets i = c.getInsets();

        size = b.getSize(size);

        viewRect.x = i.left;

        viewRect.y = i.top;

        viewRect.width = size.width - (i.right + viewRect.x);

        viewRect.height = size.height - (i.bottom + viewRect.y);

        iconRect.x = iconRect.y = iconRect.width = iconRect.height = 0;

        textRect.x = textRect.y = textRect.width = textRect.height = 0;

        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.getText() == null ? 0 : 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 {

                paintText(g, b, textRect, text);

            }

            if(b.hasFocus() && b.isFocusPainted() &&

               textRect.width > 0 && textRect.height > 0 ) {

                paintFocus(g, textRect, size);

            }

        }

    }

    protected void paintFocus(Graphics g, Rectangle textRect, Dimension size){

    }

    /* These Insets/Rectangles are allocated once for all

     * RadioButtonUI.getPreferredSize() calls.  Re-using rectangles

     * rather than allocating them in each call substantially

     * reduced the time it took getPreferredSize() to run.  Obviously,

     * this method can't be re-entered.

     */

    private static Rectangle prefViewRect = new Rectangle();

    private static Rectangle prefIconRect = new Rectangle();

    private static Rectangle prefTextRect = new Rectangle();

    private static Insets prefInsets = new Insets(0, 0, 0, 0);

    /**

     * The preferred size of the radio button

     */

    public Dimension getPreferredSize(JComponent c) {

        if(c.getComponentCount() > 0) {

            return null;

        }

        AbstractButton b = (AbstractButton) c;

        String text = b.getText();

        Icon buttonIcon = b.getIcon();

        if(buttonIcon == null) {

            buttonIcon = getDefaultIcon();

        }

        Font font = b.getFont();

        FontMetrics fm = b.getFontMetrics(font);

        prefViewRect.x = prefViewRect.y = 0;

        prefViewRect.width = Short.MAX_VALUE;

        prefViewRect.height = Short.MAX_VALUE;

        prefIconRect.x = prefIconRect.y = prefIconRect.width = prefIconRect.height = 0;

        prefTextRect.x = prefTextRect.y = prefTextRect.width = prefTextRect.height = 0;

        SwingUtilities.layoutCompoundLabel(

            c, fm, text, buttonIcon,

            b.getVerticalAlignment(), b.getHorizontalAlignment(),

            b.getVerticalTextPosition(), b.getHorizontalTextPosition(),

            prefViewRect, prefIconRect, prefTextRect,

            text == null ? 0 : b.getIconTextGap());

        // find the union of the icon and text rects (from Rectangle.java)

        int x1 = Math.min(prefIconRect.x, prefTextRect.x);

        int x2 = Math.max(prefIconRect.x + prefIconRect.width,

                          prefTextRect.x + prefTextRect.width);

        int y1 = Math.min(prefIconRect.y, prefTextRect.y);

        int y2 = Math.max(prefIconRect.y + prefIconRect.height,

                          prefTextRect.y + prefTextRect.height);

        int width = x2 - x1;

        int height = y2 - y1;

        prefInsets = b.getInsets(prefInsets);

        width += prefInsets.left + prefInsets.right;

        height += prefInsets.top + prefInsets.bottom;

        return new Dimension(width, height);

    }

}