package simplegraphics;

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class MyCanvas extends Canvas
{
   private int width, height, widthPosition, heightPosition;

   public MyCanvas()
   {
      width = getWidth();
      height = getHeight();
      widthPosition = width/3;
       heightPosition = height/3;
   }

   public void paint(Graphics g)
   {
      //clear screen
      g.setColor(0xffffff);
      g.fillRect(0,0,width,height);

      //draw circle
      g.setColor(0);
      g.drawArc(widthPosition,heightPosition,width/4,height/4,0,360);
   }

   protected void keyPressed(int keyCode)
   {
      if (getGameAction(keyCode) == Canvas.UP)
      {
         heightPosition = heightPosition - 1;			
         repaint();
      }

      if (getGameAction(keyCode) == Canvas.DOWN)
      {
         heightPosition = heightPosition + 1;			
         repaint();
      }
	
      if (getGameAction(keyCode) == Canvas.LEFT)
      {
         widthPosition = widthPosition - 1;			
         repaint();
      }
	
      if (getGameAction(keyCode) == Canvas.RIGHT)
      {
         widthPosition = widthPosition + 1;			
         repaint();
      }
   }
}