/*

 * Copyright 1998-2005 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.metal;

import sun.swing.SwingUtilities2;

import java.awt.*;

import java.awt.event.*;

import java.lang.ref.*;

import java.util.*;

import javax.swing.plaf.basic.BasicToggleButtonUI;

import javax.swing.*;

import javax.swing.border.*;

import javax.swing.plaf.*;

import javax.swing.*;

import java.io.Serializable;

/**

 * MetalToggleButton implementation

 * <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<sup><font size="-2">TM</font></sup>

 * has been added to the <code>java.beans</code> package.

 * Please see {@link java.beans.XMLEncoder}.

 *

 * @author Tom Santos

 */

public class MetalToggleButtonUI extends BasicToggleButtonUI {

    protected Color focusColor;

    protected Color selectColor;

    protected Color disabledTextColor;

    private boolean defaults_initialized = false;

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

    //        Create PLAF

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

    public static ComponentUI createUI(JComponent b) {

        return metalToggleButtonUI;

    }

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

    //        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;

        }

    }

    protected void uninstallDefaults(AbstractButton b) {

        super.uninstallDefaults(b);

        defaults_initialized = false;

    }

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

    //         Default Accessors

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

    protected Color getSelectColor() {

        return selectColor;

    }

    protected Color getDisabledTextColor() {

        return disabledTextColor;

    }

    protected Color getFocusColor() {

        return focusColor;

    }

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

    //        Paint Methods

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

    /**

     * If necessary paints the background of the component, then invokes

     * <code>paint</code>.

     *

     * @param g Graphics to paint to

     * @param c JComponent painting on

     * @throws NullPointerException if <code>g</code> or <code>c</code> is

     *         null

     * @see javax.swing.plaf.ComponentUI#update

     * @see javax.swing.plaf.ComponentUI#paint

     * @since 1.5

     */

    public void update(Graphics g, JComponent c) {

        AbstractButton button = (AbstractButton)c;

        if ((c.getBackground() instanceof UIResource) &&

                        button.isContentAreaFilled() && c.isEnabled()) {

            ButtonModel model = button.getModel();

            if (!MetalUtils.isToolBarButton(c)) {

                if (!model.isArmed() && !model.isPressed() &&

                        MetalUtils.drawGradient(

                        c, g, "ToggleButton.gradient", 0, 0, c.getWidth(),

                        c.getHeight(), true)) {

                    paint(g, c);

                    return;

                }

            }

            else if ((model.isRollover() || model.isSelected()) &&

                        MetalUtils.drawGradient(c, g, "ToggleButton.gradient",

                        0, 0, c.getWidth(), c.getHeight(), true)) {

                paint(g, c);

                return;

            }

        }

        super.update(g, c);

    }

    protected void paintButtonPressed(Graphics g, AbstractButton b) {

        if ( b.isContentAreaFilled() ) {

            g.setColor(getSelectColor());

            g.fillRect(0, 0, b.getWidth(), b.getHeight());

        }

    }

    protected void paintText(Graphics g, JComponent c, Rectangle textRect, String text) {

        AbstractButton b = (AbstractButton) c;

        ButtonModel model = b.getModel();

        FontMetrics fm = SwingUtilities2.getFontMetrics(b, g);

        int mnemIndex = b.getDisplayedMnemonicIndex();

        /* Draw the Text */

        if(model.isEnabled()) {

            /*** paint the text normally */

            g.setColor(b.getForeground());

        }

        else {

            /*** paint the text disabled ***/

            if (model.isSelected()) {

                g.setColor(c.getBackground());

            } else {

                g.setColor(getDisabledTextColor());

            }

        }

        SwingUtilities2.drawStringUnderlineCharAt(c, g, text, mnemIndex,

                textRect.x, textRect.y + fm.getAscent());

    }

    protected void paintFocus(Graphics g, AbstractButton b,

                              Rectangle viewRect, Rectangle textRect, Rectangle iconRect){

        Rectangle focusRect = new Rectangle();

        String text = b.getText();

        boolean isIcon = b.getIcon() != null;

        // If there is text

        if ( text != null && !text.equals( "" ) ) {

            if ( !isIcon ) {

                focusRect.setBounds( textRect );

            }

            else {

                focusRect.setBounds( iconRect.union( textRect ) );

            }

        }

        // If there is an icon and no text

        else if ( isIcon ) {

            focusRect.setBounds( iconRect );

        }

        g.setColor(getFocusColor());

        g.drawRect((focusRect.x-1), (focusRect.y-1),

                  focusRect.width+1, focusRect.height+1);

    }

    /**

     * Paints the appropriate icon of the button <code>b</code> in the

     * space <code>iconRect</code>.

     *

     * @param g Graphics to paint to

     * @param b Button to render for

     * @param iconRect space to render in

     * @throws NullPointerException if any of the arguments are null.

     * @since 1.5

     */

    protected void paintIcon(Graphics g, AbstractButton b, Rectangle iconRect) {

        super.paintIcon(g, b, iconRect);

    }

}