/*
 * @(#)MetalToggleButtonUI.java	1.28 04/04/02
 *
 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
 
package javax.swing.plaf.metal;

import com.sun.java.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}.
 *
 * @version 1.28 04/02/04
 * @author Tom Santos
 */
public class MetalToggleButtonUI extends BasicToggleButtonUI {

    private static final MetalToggleButtonUI metalToggleButtonUI = new MetalToggleButtonUI();

    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);
    }
}