/**
 * SunSphereButton displays and manages the user controls.<p>
 *
 * Copyright &copy; 1996 Martin Minow. All Rights Reserved.<p>
 * World map copyright &copy; 1992-97 Apple Computer Inc. All Rights Reserved.
 * Used by permission.<p>
 *
 * Permission to use, copy, modify, and redistribute this software and its
 * documentation for personal, non-commercial use is hereby granted provided that
 * this copyright notice and appropriate documentation appears in all copies. This
 * software may not be distributed for fee or as part of commercial, "shareware,"
 * and/or not-for-profit endevors including, but not limited to, CD-ROM collections,
 * online databases, and subscription services without specific license.<p>
 *
 * @author <a href="mailto:minow@pobox.com">Martin Minow</a>
 * @version 1.2
 * Set tabs every 8 characters.
 */
package org.minow.applets.sunsphere;
import java.awt.*;
import java.awt.event.*;
import java.util.*;

public abstract class SunSphereButton extends GraphicsButton
{
    public static final Color	defaultButtonColor	=
    			new Color(0x33, 0x99, 0x33);
    public static final Color	defaultButtonFillColor	= Color.white;
    public static final Color	defaultButtonClickColor	=
    			defaultButtonColor.darker().darker();
    protected Color		buttonColor;
    protected Color		buttonFillColor;
    protected Color		buttonClickColor;
    protected static final int	buttonRound	    =  8;   /* For drawRoundRect    */
    
    protected Image		offscreenImage;
    protected Graphics		offscreenGraphics;
    /*
     * Concrete subclasses set these values.
     */
    protected int[]		buttonIcon;
    
    /*
     * Accessors
     */
    protected SunSphereButton(
    	    String		buttonLabel,
    	    int[]		buttonIcon,
    	    int			buttonWidth,
    	    int			buttonHeight,
    	    Color		buttonColor
        )
    {
    	super(
    		buttonWidth,
    		buttonHeight
    	    );
    	setButtonColor(buttonColor);
    	buttonFillColor		= defaultButtonFillColor;
    	setButtonIcon(buttonIcon);
    	setLabel(buttonLabel);
    }
    protected void setButtonIcon(
    	    int[]		buttonIcon
        )
    {
    	this.buttonIcon		= buttonIcon;
	repaint();
    }
    protected void setButtonColor(
    	    Color		buttonColor
    	)
    {
    	this.buttonColor	= buttonColor;
    	this.buttonClickColor	= buttonColor.darker().darker();
    	repaint();
    }
    protected void setButtonFillColor(
    	    Color		buttonFillColor
    	)
    {
	this.buttonFillColor	= buttonFillColor;
	repaint();
    }
    public void update(
	    Graphics	    g
	)
    {
	paint(g);
    }
    public void paint(
	    Graphics	    g
	)
    {
    	logMouseEvent("paint");
	Dimension d		= size();
	if (offscreenImage == null
	 || offscreenImage.getWidth(this) != d.width
	 || offscreenImage.getHeight(this) != d.height) {
	    offscreenImage	= createImage(d.width, d.height);
	    offscreenGraphics	= offscreenImage.getGraphics();
	}
	Graphics osg		= offscreenImage.getGraphics();
	osg.setColor(getBackground());
	osg.fillRect(0, 0, d.width, d.height);
	int x			= (d.width - buttonWidth) / 2;
	if (mouseDown && mouseInButton) {	/* Variables in GraphicsButton */
	    osg.setColor(buttonClickColor);
	    osg.fillRoundRect(x, 0, buttonWidth - 1, buttonHeight - 1, buttonRound, buttonRound);
	}
	else {
	    osg.setColor(Color.black);
	    osg.drawRoundRect(x, 0, buttonWidth - 1, buttonHeight - 1, buttonRound, buttonRound);
	}
	if (buttonIcon != null) {
	    int rows	= buttonIcon.length;
	    for (int row = 0; row < rows; row++) {
		int v		= buttonIcon[row];
		int mask	= 0x8000;
		int col		= 5;
		int start	= col;
    exit:	while (mask != 0) {
    		    start	= col;
		    while (mask != 0 && (v & mask) == 0) {
			++col;
			mask >>>= 1;
		    }
		    if (mask == 0) {
			break exit;
		    }
		    start	= col;
		    while (mask != 0 && (v & mask) != 0) {
			++col;
			mask >>>= 1;
		    }
		    osg.setColor(buttonColor);
		    osg.drawLine(x + start, row + 2, x + col - 1, row + 2);
		}
	    }
	}
	g.drawImage(offscreenImage, 0, 0, this);
    }
}