//   Scott DeRuiter     5/6/03
//   ArcControlFrame.java
//   4 scroll bars that control height width starting point and m of angle

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

public class ArcControlFrame extends JFrame implements AdjustmentListener   
{
	private DisplayPanel canvas;
	private JScrollBar width;
	private JScrollBar height;
	private JScrollBar startDeg;
	private JScrollBar endDeg;
	int widthof, heightof, startDegof, endDegof;

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

	public ArcControlFrame ( )   
    	{
		super( "Arc Control" );
  
		widthof = heightof = startDegof = endDegof = 60;

		canvas = new DisplayPanel();
		getContentPane().add ( canvas, BorderLayout.CENTER );

		width = new JScrollBar ( JScrollBar.HORIZONTAL, 60, 5, 0, 400 );
		width.addAdjustmentListener ( this );
		getContentPane().add ( width, BorderLayout.NORTH );
		
		height = new JScrollBar ( JScrollBar.VERTICAL, 60, 5, 0, 400 );
		height.addAdjustmentListener ( this );
		getContentPane().add ( height, BorderLayout.EAST );
	
		startDeg = new JScrollBar ( JScrollBar.VERTICAL, 60, 5, 0, 360 );
		startDeg.addAdjustmentListener ( this );
		getContentPane().add ( startDeg, BorderLayout.WEST );
	
		endDeg = new JScrollBar ( JScrollBar.HORIZONTAL, 60, 5, 0, 370 );
		endDeg.addAdjustmentListener ( this );
		getContentPane().add ( endDeg, BorderLayout.SOUTH );

		setDefaultCloseOperation ( DISPOSE_ON_CLOSE );      
		setLocation ( 20, 50 );
		setSize ( 500, 500 );
		show ( );
	}

	class DisplayPanel extends JPanel   
    	{

		public DisplayPanel ( )   
        	{
			setBackground ( Color.black );
		}

		public void paintComponent(Graphics g )
        	{
			super.paintComponent ( g );
			g.setColor ( Color.blue );
			g.fillArc ( 30, 30, widthof, heightof, startDegof, endDegof ); 
		}
	}

	public void adjustmentValueChanged( AdjustmentEvent e)
    	{
        	widthof = width.getValue ( );
		heightof = height.getValue ( );
		startDegof = startDeg.getValue ( );
		endDegof = endDeg.getValue ( );
		canvas.repaint ( );
	}
}

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