//Animation of ball
//Author - Sameer Panse
//To ovrcome flicker effect, I have overridden update and paint methods.
//Still the effect is not completely eliminated.
// You can try double buffering to overcome this effect.
//This code works fine but little modifications are needed.
//Soon this code will be updated.
/*
*/
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Color;
import java.awt.*;
import java.awt.event.*;
public class Animation extends java.applet.Applet implements Runnable, ActionListener
{
//Image animPics[] = new Image[10];
Image currentImg,offscreenImg,animPic;
Graphics offscreen,s;
Thread runner;
int x,dx=226,dy=335,y;
boolean dx1=true,dy1=true;
Button bStart,bStop,bExit;
public void init()
{
bStart=new Button("Start");
bStop=new Button("Stop");
bExit=new Button("End");
animPic=getImage(getCodeBase(),"Ball1.gif");
add(bStart);
//add(bStop);
//add(bExit);
bStart.addActionListener(this);
bStop.addActionListener(this);
bExit.addActionListener(this);
}
public void start()
{
if(runner==null)
{
runner = new Thread(this);
System.out.println("Hello!!!");
//runner.start();
System.out.println("After start");
}
}
public void stop()
{
runner=null;
}
public void run()
{
System.out.println("In run");
setBackground(Color.white);
//repaint();
while(true) ballrun();
// System.out.println("Finished");
}
void ballrun()
{
int sam=0,i;
while(dx<537 && dy>37 && dx>=1 && dy<=340)
{
if(dx==536)
{
System.out.println("dx changed");
dx1=false;
}
if(dy==339)
{
System.out.println("dy changed");
dy1=false;
}
if(dx==1)
{
System.out.println("dx changed");
dx1=true;
}
if(dy==38)
{
System.out.println("dy changed");
dy1=true;
}
x=dx;
y=dy;
currentImg=animPic;
// System.out.println("In ballrun--"+sam);
repaint();
pause(5);
if(dx1) dx++;
else dx--;
if(dy1) dy++;
else dy--;
sam++;
}
}
void pause(int time)
{
try
{
Thread.sleep(time);
}
catch(InterruptedException e)
{
System.out.println("Error......"+e);
}
}
public void update(Graphics g)
{
g.setColor(getBackground());
g.fillRect(1,36,598,363);
g.setColor(getForeground());
paint(g);
}
public void paint(Graphics screen)
{
if(currentImg !=null)
try
{
screen.drawLine(2,35,598,35);
screen.drawRect(1,36,598,363);
screen.drawImage(currentImg,x,y,this);
//System.out.println("In Paint--");
//System.out.println("currentImg--"+currentImg);
}
catch(InternalError e1)
{
System.out.println("Error "+e1);
}
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==bStart)
{
showStatus("Animation Started");
runner.start();
}
/* if(e.getSource()==bStop)
{
showStatus("Animation Stoped");
runner=null;
}
if(e.getSource()==bExit)
{
showStatus("Animation Ends");
}*/
}
}