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

public class MF extends Applet{
 Mandel_F f;
 public void init(){
  setLayout(new BorderLayout());
  add("Center",new Button("Mandel_F"));
  f=new Mandel_F("Mandel_F");
 }
 public boolean action(Event e,Object o){
  f.init();
  return true;
 }
}
class Mandel_F extends Frame{
    Mf_Controls controls;
    M_F w;
    public Mandel_F(String t){
     setTitle(t);
    }
    public void init() {
	setLayout(new BorderLayout());
	Mf_Canvas c = new Mf_Canvas();
	w=new M_F("M_F");
	add("Center", c);
	add("South", controls = new Mf_Controls(w));
	show();
	Dimension d=getToolkit().getScreenSize();
	resize(509,584);
	}
	public void start(){
	controls.enable();
	}
	public void stop(){
	controls.disable();
	}

    public boolean handleEvent(Event e) {
	if (e.id == Event.WINDOW_DESTROY) {
	    dispose();
	}
	return false;
	}
	
}

class Mf_Canvas extends Canvas {
    int xx=25000;
    int yy=25000;
    int aa=1;
    Font font;
    
 public void paint(Graphics g) {
  int a=aa;
  int hx,hy;
  double xxx=xx/100-250;
  double yyy=yy/100-250;
  double x=xxx/200-0.75;
  double y=yyy/200;
  double zr,zi,z,p,r;
  for(double j=-1.25/a+y;j<1.25/a+y;j=j+0.005/a){
   for(double i=-1.25/a+x;i<1.25/a+x;i=i+0.005/a){
    hx=(int)(250-200*x*a+i*200*a);
    hy=(int)(250-200*y*a+j*200*a);
    zr=0;zi=0;
    for(int k=0;k<=100;k++){
     z=zr*zr-zi*zi+i;
     p=2*zr*zi+j;
     r=z*z+p*p;
     if(r>=4&&k<=100){
      g.setColor(new Color((int)(127*Math.round(Math.sin(3.14*(k*3-90)/180)+1)),
                           (int)(127*Math.round(Math.sin(3.14*k*3/180)+1)),
                           (int)(127*Math.round(Math.sin(3.14*(k*3+90)/180)+1))));
      g.fillRect(hx,hy,1,1);
      break;
     }else if(r<4&&k==100){
      g.setColor(Color.black);
      g.fillRect(hx,hy,1,1);
      break;
     }
     zr=z;zi=p;
    }
   }
  }
  g.setColor(Color.white);
  g.setFont(font);
  g.drawLine(0,0,500,0);
  g.drawLine(0,0,0,500);
  g.drawLine(500,500,0,500);
  g.drawLine(500,500,500,0);
  g.drawLine(0,400,500,400);
  g.drawLine(0,300,500,300);
  g.drawLine(0,200,500,200);
  g.drawLine(0,100,500,100);
  g.drawLine(400,0,400,500);
  g.drawLine(300,0,300,500);
  g.drawLine(200,0,200,500);
  g.drawLine(100,0,100,500);
  g.drawString("Xp="+xx,30,120);
  g.drawString("Yp="+yy,30,140);
  g.drawString("倍率："+aa,30,160);
  g.drawString("Xp",450,10);
  g.drawString("Yp",5,460);
  g.drawString("0",5,10);
  g.drawString("10000",105,10);
  g.drawString("20000",205,10);
  g.drawString("30000",305,10);
  g.drawString("40000",405,10);
  g.drawString("50000",470,10);
  g.drawString("10000",5,110);
  g.drawString("20000",5,210);
  g.drawString("30000",5,310);
  g.drawString("40000",5,410);
  g.drawString("50000",5,495);
  g.setFont(new Font("TimesRoman",Font.BOLD,30));
  String st="Mandel Finder";
  Relief(g,st,20,50);
 }
 private void Relief(Graphics g,String s,int x,int y){
  g.setColor(Color.white);
  g.drawString(s,x-1,y-1);
  g.setColor(Color.black);
  g.drawString(s,x+1,y+1);
  g.setColor(Color.red);
  g.drawString(s,x,y);
 }
}
class M_F extends Frame{
 int xx,yy,aa;
 boolean filled=true;
 Font font;
 public M_F(String t){
  setTitle(t);
 }
 public void init(){
  Dimension d=getToolkit().getScreenSize();
  resize(509,549);
  show();
 }
 public boolean handleEvent(Event e){
  if(e.id==Event.WINDOW_DESTROY){
   dispose();
  }
  return true;
 }
 public void paint(Graphics g){
  int a=aa;
  int hx,hy,hz;
  double xxx=xx/100-250;
  double yyy=yy/100-250;
  double x=xxx/200-0.75;
  double y=yyy/200;
  double zr,zi,z,p,r;
  for(double j=-1.25/a+y;j<1.25/a+y;j=j+0.005/a){
   for(double i=-1.25/a+x;i<1.25/a+x;i=i+0.005/a){
    hx=(int)(250-200*x*a+i*200*a);
    hy=(int)(250-200*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)(127*Math.round(Math.sin(3.14*(k*3-90)/180)+1)),
                           (int)(127*Math.round(Math.sin(3.14*k*3/180)+1)),
                           (int)(127*Math.round(Math.sin(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);
      break;
     }
     zr=z;zi=p;
    }
   }
  }
  g.setColor(Color.white);
  g.setFont(font);
  g.drawString("Xp="+xx,20,20);
  g.drawString("Yp="+yy,20,40);
  g.drawString("倍率："+aa,20,60);
 }
 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 Mf_Controls extends Panel {
    TextField xp;
    TextField yp;
    TextField ap;
    M_F frame;

    public Mf_Controls(M_F frame) {
	this.frame = frame;
	add(new Label("Xp =",Label.RIGHT));
	add(xp = new TextField("25000", 5));
	add(new Label("Yp =",Label.RIGHT));
	add(yp = new TextField("25000", 5));
	add(new Label("倍率：",Label.RIGHT));
	add(ap = new TextField("1",6));
	add(new Button("表示"));
	}

    public boolean action(Event ev, Object arg) {
	if (ev.target instanceof Button) {
	    String label = (String)arg;

	    frame.redraw(label.equals("表示"),
              Integer.parseInt(xp.getText().trim()),
              Integer.parseInt(yp.getText().trim()),
              Integer.parseInt(ap.getText().trim())); 
	    frame.init();
	    return true;
	}

	return false;
    }
}