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

public  class RollB extends JPanel implements ActionListener{

  JMenuBar b;
  JMenu menu = new JMenu("Game Controls");
  JMenuItem quit = new JMenuItem("Quit");
  JMenuItem stop = new JMenuItem("Stop");
  JMenuItem start = new JMenuItem("Start");
  JMenuItem speed = new JMenuItem("Speed");
  JMenuItem newstart = new JMenuItem("New Start");
  JMenuItem ballcount = new JMenuItem("Ball Count");
  private int tempH;
  private int tempV;
  private int tempR;
  private int ballCount = 20;
  private String newspeed;
  int width = 700;
  int height = 250;
  Timer clock = new Timer(20,this);
  int NWall = 0; int WWall = 0; int EWall = width; int SWall = height;
  int h = ((int)(Math.random() * 10) - 5);
  int v = ((int)(Math.random() * 10) - 5);
  int r = 50;
  int x = (r + ((int)(Math.random() * (width - r)) - r));
  int y = (r + ((int)(Math.random() * (height - r)) - r));
  Ball ball = new Ball(x,y,r,h,v);

  public RollB(JMenuBar bar){
    setPreferredSize(new Dimension(width,height));
    clock.start();
    this.b = bar;
    b.add(menu);
    menu.add(quit);
    menu.add(stop);
    menu.add(start);
    menu.add(speed);
    menu.add(newstart);
    menu.add(ballcount);
    quit.addActionListener(this);
    stop.addActionListener(this);
    start.addActionListener(this);
    speed.addActionListener(this);
    newstart.addActionListener(this);
    ballcount.addActionListener(this);
    Ball[] ballarray = new Ball[20]
  }

  public void paintComponent(Graphics g){
    super.paintComponent(g);
    drawBalls(g);
  }

  public void drawBalls(Graphics g){
    g.fillOval(ball.getX(),ball.getY(),ball.getR(),ball.getR());
  }

   public void reflectBalls(){
     // when ball reaches (crosses) a wall, it flips (bounces)
    if (ball.getY() <= NWall) ball.flipVertical();
    else if (ball.getY() >= (SWall-50)) ball.flipVertical();
    else if (ball.getX() <= WWall) ball.flipHorizontal();
    else if (ball.getX() >= EWall-50) ball.flipHorizontal();
  }

   public void advanceBalls(){
     // ball moves ahead h,v units
     ball.advance();
   }

  public void actionPerformed(ActionEvent e){
    if (e.getSource() == quit){
      System.exit(0);
    }
    if (e.getSource() == stop){
      tempH = ball.getH();
      tempV = ball.getV();
      ball.setH(0);
      ball.setV(0);
    }
    if (e.getSource() == start){
      ball.setH(tempH);
      ball.setV(tempV);
    }
    if (e.getSource() == speed){
      newspeed = JOptionPane.showInputDialog("enter delay - smaller = faster");
      clock.setDelay(Integer.parseInt(newspeed));
    }
    if (e.getSource() == newstart){
      ball.setH((int)(Math.random() * 10) - 5);
      ball.setV((int)(Math.random() * 10) - 5);
      ball.setX(r + ((int)(Math.random() * (width - r)) - r));
      ball.setY(r + ((int)(Math.random() * (height - r)) - r));
    }

    if (e.getSource() == clock) {
      advanceBalls();
      reflectBalls();
    }
      repaint();
    }
  }