//Title:       Instructor
//Version:     1.0
//Copyright:   Copyright (c) Vairavan Vairavan
//Author:      Vairavan Vairavan
//Company:     UWM
//Description:
package ballbounce;

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

public class BallBounce extends Applet implements Runnable,ActionListener {
  boolean isStandalone = false;
  private Thread m_ball = null;
  Image ballpic ;
  String ballsrc = "balls011.GIF";
  int xpos=10;
  int ypos = 220;
  Button bFast,bSlow;
  int sleeptime=500;


  //Get a parameter value
  public String getParameter(String key, String def) {
    return isStandalone ? System.getProperty(key, def) :
      (getParameter(key) != null ? getParameter(key) : def);
  }
  //Construct the applet
  public BallBounce() {
  }

  //Initialize the applet
 public void init()
	{
    	setSize(320, 300);
        bFast = new Button("BOUNCE FAST");
        bSlow = new Button("BOUNCE SLOW");
        bFast.addActionListener(this);
        bSlow.addActionListener(this);
        add(bFast);
        add(bSlow);
	}

  //Component initialization
  private void jbInit() throws Exception {
  }


  public void paint(Graphics g)
  {
  g.drawImage(ballpic, xpos, ypos,this);
  }

  public void start()
  {
  if (m_ball == null)
    {
     m_ball = new Thread(this);
     m_ball.start();
    }
  }

  public void stop()
  {
  if (m_ball != null)
     m_ball = null;
  }

  public void run()
  {
   // initialize

  ballpic = getImage(getCodeBase(),ballsrc);

  setBackground(Color.white);


  // bounce ball from one side of the screen to the other side
  while (xpos< this.getSize().width)
    {
    bounce(true);
    bounce(false);
    }
  }

  public void actionPerformed(ActionEvent e)
  {
   Button b = (Button) e.getSource();
   if (b.equals(bFast))
   {
   sleeptime-=50;
   if (sleeptime == 0)
     sleeptime=50;
   }
    if (b.equals(bSlow))
   {
   sleeptime+=50;
   if (sleeptime >= 5000)
     sleeptime=5000;
   }
  }
  void bounce(boolean up)
  {
    for (int i=0; i<3; i++)
	{
	xpos +=10*i;
	if (up)
	  ypos -=20*i;
	else
	  ypos +=20*i;
	repaint();
	pause(sleeptime);
	}
  }


  void pause(int time)
  {
    try { Thread.sleep(time); }
    catch (InterruptedException e) { }
  }

  //Destroy the applet
  public void destroy() {
  }

  //Get Applet information
  public String getAppletInfo() {
    return "Applet Information";
  }

  //Get parameter info
  public String[][] getParameterInfo() {
    return null;
  }
}