import java.awt.*;
import java.applet.*;

//  This applet tests the 216 color Web palette base on RGB having only the 
//  following decimal(hex) values 00(00), 51(33), 102(66), 153(99), 204(CC), 255(FF). 
//  Other values are also permitted in the display.

public class TryColor extends Applet {

public void init()
{
	setBackground(Color.white);
	boolean netscapeBrowser = false;
	if (System.getProperty("java.vendor").startsWith("Netscape")) netscapeBrowser = true;
	setLayout(new BorderLayout(0, 15));
	ColorPan top = new ColorPan(netscapeBrowser);
	add("North", top);
	ColorPan bottom = new ColorPan(netscapeBrowser);
	add("South", bottom);
}
}  // END OF Class TryColor
 


final class ColorPan extends Panel  {

Button[] downLotsButton, downBitButton, valueButton, upBitButton, upLotsButton;
String[] colorString = { " Red", " Green", " Blue" };
int[] gun;
Color buttonColor;
boolean colorChanged;
Scrollbar scrollbar;
Panel adjust;
boolean netscapeBrowser;

ColorPan(boolean netscapeBrowser)
{
	this.netscapeBrowser = netscapeBrowser;
	setLayout (new BorderLayout(0, 5));
	scrollbar = new Scrollbar(Scrollbar.HORIZONTAL, 0, 5, 0, 20);
	add("South", scrollbar);
	adjust = new Panel();
	adjust.setLayout(new GridLayout(3, 5));
	add("North", adjust);
	downLotsButton = new Button[3];
	downBitButton = new Button[3];
	valueButton = new Button[3];
	upBitButton = new Button[3];
	upLotsButton = new Button[3];
	Font font = new Font("TimesRoman", Font.BOLD, 40);
	gun = new int[3];
	for (int color = 0; color < 3; color++)
	{
		downLotsButton[color] = new Button("<<");
		downBitButton[color] = new Button("<");
		valueButton[color] = new Button(String.valueOf(gun[color] = 204) + colorString[color]);
		upBitButton[color] = new Button(">");
		upLotsButton[color] = new Button(">>");
		downLotsButton[color].setFont(font);
		downBitButton[color].setFont(font);
		valueButton[color].setFont(font);
		upBitButton[color].setFont(font);
		upLotsButton[color].setFont(font);
		adjust.add(downLotsButton[color]);
		adjust.add(downBitButton[color]);
		adjust.add(valueButton[color]);
		adjust.add(upBitButton[color]);
		adjust.add(upLotsButton[color]);
	}
	changeColors();
}


final void changeColors()
{
	buttonColor = new Color (gun[0], gun[1], gun[2]);
	for (int i=0; i<3; i++)
	{
		downLotsButton[i].setBackground(buttonColor);
		downBitButton[i].setBackground(buttonColor);
		valueButton[i].setBackground(buttonColor);
		upBitButton[i].setBackground(buttonColor);
		upLotsButton[i].setBackground(buttonColor);
		valueButton[i].setLabel(String.valueOf(gun[i]) + colorString[i]);
	}
	scrollbar.setBackground(buttonColor);
	if (netscapeBrowser)
	{
		hide();
		show();
	}
}

public final boolean action(Event evt, Object obj)
{
	for (int color = 0; color < 3; color++)
	{
		colorChanged = false;
		if (evt.target == downLotsButton[color])
		{
			if (gun[color] < 1) return true;
			gun[color] = 51*((gun[color] - 1)/51);
			colorChanged = true;
		}
		else if (evt.target == downBitButton[color])
		{
			if (gun[color] < 1) return true;
			gun[color]--;
			colorChanged = true;
		}
		else if (evt.target == upBitButton[color])
		{
			if (gun[color] > 254) return true;
			gun[color]++;
			colorChanged = true;
		}
		else if (evt.target == upLotsButton[color])
		{
			if (gun[color] > 254) return true;
			gun[color] = 51*((gun[color]/51) + 1);
			colorChanged = true;
		}
		if (colorChanged) changeColors();
	}
	return super.action(evt, obj);
}
}  // END OF Class ColorPan