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

public class MandelbFinder extends Applet{
 Mandelb_F w;
 public void init(){
  setLayout(new BorderLayout());
  add("Center",new Button("Mandelbrot Finder"));
  w=new Mandelb_F("Mandelb_F");
 }
 public boolean action(Event e,Object o){
  w.init();
  return true;
 }
}
class Mandelb_F extends Frame{
 mbf_Controls controls;
 public Mandelb_F(String t){
  setTitle(t);
 }
 public void init(){
  setLayout(new BorderLayout());
  mbfCanvas c=new mbfCanvas();
  add("Center",c);
  add("South",controls=new mbf_Controls(c));
  show();
  Dimension d=getToolkit().getScreenSize();
  resize(409,484);
 }
 public void start(){
  controls.enable();
 }
 public void stop(){
  controls.disable();
 }
 public boolean handleEvent(Event e){
  if(e.id==Event.WINDOW_DESTROY){
   dispose();
  }
  return true;
 }
}
class mbfCanvas extends Canvas{
 double dxx=0.0,dyy=0.0,daa=2.0;
 int xx,yy,aa;
 boolean filled=true;
 public void paint(Graphics g){
  int hx,hy;
  double xxx=xx-200;
  double yyy=yy-200;
  double x=xxx/100-dxx;
  double y=yyy/100-dyy;
  double a=(aa/100)*daa/4;
  double zr,zi,z,p,r,hz;
  for(double j=-1.0/a+y;j<1.0/a+y;j=j+0.005/a){
   for(double i=-1.0/a+x;i<1.0/a+x;i=i+0.005/a){
    hx=(int)(200-200*x*a+i*200*a);
    hy=(int)(200-200*y*a+j*200*a);
    hz=(int)(Math.round((1000/3)*(Math.log(a))/(Math.log(10))+500));
    zr=0;zi=0;
    for(int k=0;k<=hz;k++){
     z=zr*zr-zi*zi+i;
     p=2*zr*zi+j;
     r=z*z+p*p;
     if(r>=4&&k<=hz){
      g.setColor(new Color((int)(125*Math.round(Math.sin(15*3.14*(k*3-90)/180)+1)),
                           (int)(125*Math.round(Math.sin(15*3.14*k*3/180)+1)),
                           (int)(125*Math.round(Math.sin(15*3.14*(k*3+90)/180)+1))));
      g.fillRect(hx,hy,1,1);
      break;
     }else if(r<4&&k==hz){
      g.setColor(new Color(0,0,0));
      g.fillRect(hx,hy,1,1);
     }
     zr=z;zi=p;
    }
   }
  }
 }
 public boolean mouseDown(Event e,int dx,int dy){
  dxx=(200-dx)/(daa*100)+dxx;
  dyy=(200-dy)/(daa*100)+dyy;
  daa=daa+daa;
  repaint();
  return true;
 }
 public void redraw(boolean filled,int xpp,int ypp,int app){
  this.filled=filled;
  this.xx=xpp;
  this.yy=ypp;
  this.aa=app;
  repaint();
 }
}
class mbf_Controls extends Panel{
 mbfCanvas canvas;
 public mbf_Controls(mbfCanvas canvas){
  this.canvas=canvas;
  add(new Button("start"));
 }
 public boolean action(Event ev,Object arg){
  Button b=(Button)ev.target;
  if("start".equals(b.getLabel())){
   String label=(String)arg;
   canvas.redraw(label.equals("start"),200,200,100);
  }
  return true;
 }
}