//  Scott DeRuiter          5/6/2003
//  ColorChooseFrame.java
//  Use the left, right, up, and down arrows to set a color, and show it on the screen.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;


public class ColorChooseFrame extends JFrame implements KeyListener, FocusListener, MouseListener   
{
	SlideBar bar1;
	SlideBar bar2;
	SlideBar bar3;
	int barchoice;
	boolean firsttime;
	DisplayPanel canvas;

	public static void main ( String[] args )   
    	{
		new ColorChooseFrame ( );
	}

	public ColorChooseFrame ( )   
    	{
		super( "Color Choose" );
		bar1 = new SlideBar ( 40, 20, 255, 125, true );
		bar2 = new SlideBar ( 80, 20, 255, 125, false );
		bar3 = new SlideBar ( 120, 20, 255, 125, false );
		barchoice = 1;
		firsttime = true;
		canvas = new DisplayPanel();
		setContentPane(canvas);
		canvas.setBackground(Color.white);
		canvas.addFocusListener(this);
		canvas.addKeyListener(this);
		canvas.addMouseListener(this);

		setSize ( 410, 360 );
		setResizable(false);
		setDefaultCloseOperation ( DISPOSE_ON_CLOSE );      
		setLocation ( 20, 50 );
		show ( );
	}
   
	class DisplayPanel extends JPanel 
    	{

		public void paintComponent(Graphics g) 
        	{
			super.paintComponent(g);
			paintback ( g );
			bar1.draw ( g );
			bar2.draw ( g );
			bar3.draw ( g );
			if ( firsttime )
				instructions ( g );
			else
				drawColoredRect ( g );
		}

		public void paintback ( Graphics g )    
        	{
			g.setColor ( Color.black );
			g.fillRect ( 0, 0, 10, 320 );
			g.fillRect ( 0, 0, 400, 10 );	
			g.fillRect ( 390, 0, 10, 320 );
			g.fillRect ( 0, 310, 400, 10 );
			g.setColor ( Color.white );
			g.fillRect ( 10, 10, 380, 300 );
		}

		public void instructions ( Graphics g )    
        	{
			g.setColor ( Color.black );
			g.drawString ( "Click on the applet ", 200, 80 );
			g.drawString ( "window to start.", 200, 110 );
			g.drawString ( "Use the up, down, right, ", 200, 140 );
			g.drawString ( "and left arrow keys to ", 200, 170 );
			g.drawString ( "control the bars.", 200, 200 );
			firsttime = false;
		}

		public void drawColoredRect ( Graphics g )    
        	{
			Color chosen = new Color ( bar1.Value(), bar2.Value(), bar3.Value() );
			g.setColor ( chosen );
			g.fillRect ( 150, 60, 200, 200 );
			g.setColor ( Color.black );
			g.drawRect ( 150, 60, 200, 200 );
			g.drawString ( "Color (" + bar1.Value() + ", " + bar2.Value() + ", " +
					bar3.Value() + " )", 200, 280 );
		}
	}

	public void focusGained(FocusEvent evt) 
    	{
		firsttime = false;
		movebar ( 0 );
		canvas.repaint();
	}
   
	public void focusLost(FocusEvent evt) 
    	{
		firsttime = true;
		movebar ( 0 );
		canvas.repaint();
	}

	public void mousePressed(MouseEvent evt) 
    	{
		canvas.requestFocus();
	}   
   
   	public void mouseEntered(MouseEvent evt) { }
	public void mouseExited(MouseEvent evt) { }
	public void mouseReleased(MouseEvent evt) { }
	public void mouseClicked(MouseEvent evt) { }
   
	public void keyTyped ( KeyEvent e )   {}

	public void keyPressed ( KeyEvent e )   
    	{
		int value = e.getKeyCode();
		if ( value == KeyEvent.VK_DOWN )
			movebar ( -5 );
		else if ( value == KeyEvent.VK_UP )
			movebar ( 5 );
		else if ( value == KeyEvent.VK_RIGHT )  
        	{
			if ( barchoice == 3 )
				barchoice = 3;
			else
				barchoice++;
			movebar ( 0 );
		}
		else if ( value == KeyEvent.VK_LEFT )   
        	{
			if ( barchoice == 1 )
				barchoice = 1;
			else
				barchoice--;
			movebar ( 0 );
		}
		canvas.repaint();
	}
	
	public void keyReleased ( KeyEvent e )   {}

	public void movebar ( int motion )   
    	{
		if ( barchoice == 1 )
			bar1.slide ( motion );
		else if ( barchoice == 2 )    
			bar2.slide ( motion );
		else if ( barchoice == 3 )
			bar3.slide ( motion );
	}
}

class SlideBar      
{
	private int xpos, ypos, height, position;
	public boolean on = true;

	public SlideBar  ( int x, int y, int h, int p, boolean o )   
    	{
		xpos = x;
		ypos = y;
		height = h;
		position = p;
		on = o;
	}

	public void slide ( int m )   
    	{
		on = true;
		position += m;
		if ( position > 255 )
			position = 255;
		else if ( position < 0 )
			position = 0;
	}

	public void draw ( Graphics g )   
    	{
		g.setColor ( Color.black );
		g.drawLine ( xpos, ypos, xpos, ypos + height );
		if ( on )
			g.setColor ( Color.red );
		g.fillRect ( xpos - 10, ypos + height - position - 5, 20, 10 );
		g.drawString ( "" + position, xpos - 5, ypos + height + 20 );
		on = false;
	}

	public int Value ()  
    	{
		return position;
	}
}

(Applet "LaunchColorChooseFrame" would be displayed here
if Java were available.)