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

public class FareTesti extends Applet 
implements MouseListener, MouseMotionListener,ActionListener 
{ int INCR=1 ;

int DECR=-1 ;
int yay=0;
int PREDX=1; 
int par1,par2;
int PREDY=0;
 private int nx,ny,nnx,nny=-10; 
  int say=0,r=0;
  int[] xx=new int[2];
  int[] yy=new int[2];
 private String s=""; 
private Button B1,B2,B3,B4; 
private TextField T1,T2;
 public void init() 
 { T1=new TextField("25");
   add(T1);
   T2=new TextField("25");
   add(T2);
 B1=new Button("týklanan iki nokta arasý doðru çiz"); 
B1.addActionListener(this);
add(B1); 
B2=new Button("yarýçaplý yayý çiz"); 
B2.addActionListener(this);
add(B2); 
B3=new Button("yarýçaplý daireyi çiz"); 
B3.addActionListener(this);
add(B3); 
B4=new Button("alaný tara da yolumuzu bulalým"); 
B4.addActionListener(this);
add(B4); 
    
 addMouseListener(this); 
 addMouseMotionListener(this); 
 } 

 public void paint(Graphics g) 
 { if(nnx!=-1){int x1,y1,x2,y2,dx,dy,e=0,e_noinc=0,e_inc=0;
   x1=xx[0];x2=xx[1];y1=yy[0];y2=yy[1];
int incdec, t, i ; 

  

if ( x1 > x2 ) 

{ 

t = x1 ; x1 = x2 ; x2 = t ; 

t = y1 ; y1 = y2 ; y2 = t ; 

}

  

dx = x2 - x1 ; dy = y2 - y1 ; 

  

if ( dx == 0 ) /* vertical line */ 

{ 

if ( y1 > y2 ) 

{ 

t = y1 ; y1 = y2 ; y2 = t ; 

} 

for ( i = y1 ; i <= y2 ; i++ ) 

g.drawLine ( x1, i, x1,i) ; 

  

} 

  

if ( dy == 0 )  /* horizontal line */

{

for ( i = x1 ; i < x2 ; i++ ) 

g.drawLine ( i, y1, i,y1) ; 

  
 

} 

  

/* 0 < m < 1 */

if ( dy < dx && dy > 0 )

{

e_noinc = 2 * dy ;

e = 2 * dy - dx ;

e_inc = 2 * ( dy - dx ) ;
xx[0]=x1;xx[1]=x2;yy[0]=y1;yy[1]=y2;par1=PREDX;par2=INCR;


} 

  

/* m = 1 */

if ( dy == dx && dy > 0 )

{

e_noinc = 2 * dy ;

e = 2 * dy - dx ;

e_inc = 2 * ( dy - dx ) ;
xx[0]=x1;xx[1]=x2;yy[0]=y1;yy[1]=y2;par1=PREDX;par2=INCR;


} 

  

/* 1 < m < infinity */

if ( dy > dx && dy > 0 )

{

e_noinc = 2 * dx ;

e = 2 * dx - dy ;

e_inc = 2 * ( dx - dy ) ;
xx[0]=x1;xx[1]=x2;yy[0]=y1;yy[1]=y2;par1=PREDY;par2=INCR;


} 

  

/* 0 > m > -1 */

if ( -dy < dx && dy < 0 )

{

dy = -dy ;

e_noinc = 2 * dy ;

e = 2 * dy - dx ;

e_inc = 2 * ( dy - dx ) ;
xx[0]=x1;xx[1]=x2;yy[0]=y1;yy[1]=y2;par1=PREDX;par2=DECR;


} 

  

/* m = -1 */

if ( dy == -dx && dy < 0 )

{

dy = -dy ;

e_noinc = ( 2 * dy ) ;

e = 2 * dy - dx ;

e_inc = 2 * ( dy - dx ) ;
xx[0]=x1;xx[1]=x2;yy[0]=y1;yy[1]=y2;par1=PREDX;par2=DECR;


} 

  

/* -1 > m > 0 */

if ( -dy > dx && dy < 0 )

{

dx = -dx ;

e_noinc = - ( 2*dx ) ; e = 2 * dx - dy ;

e_inc = - 2 * ( dx - dy ) ;
xx[0]=x2;xx[1]=x1;yy[0]=y2;yy[1]=y1;par1=PREDY;par2=DECR;


}

 

  

 
x1=xx[0]; y1=yy[0]; x2=xx[1]; y2=yy[1]; int pred=par1; incdec=par2;
int ij, start, end, var ;

  

if ( pred == PREDX )

{

start = x1 ;  end = x2 ;  var = y1 ; 

} 

else

{

start = y1 ;  end = y2 ;  var = x1 ; 

} 

  

for ( ij = start ; ij <= end ; ij++ )

{

if ( pred == PREDY ) 

g.drawLine ( var, ij, var,ij ) ; 

else 

g.drawLine ( ij, var,ij,var) ; 

  

if ( e < 0 ) 

e += e_noinc ; 

else 

{ 

var += incdec ; 

e += e_inc ; 

 

}

} }
   if(yay>0){
   int xo=0;int yo=r;int delta=2-2*r;int limit=yay;int ciku;    
       
 
  
  do{
 if(delta<0)
 { ciku=2*delta+2*yo-1;
 if(ciku>0){xo++;yo--;delta=delta+2*xo-2*yo+2;}
 else{xo++;delta=delta+2*xo+1;}
 }
 else{
 if(delta>0){
 ciku=2*delta-2*xo-1;
 if(ciku>0){yo--;delta=delta-2*yo+1;}
 else{xo++;yo--;delta=delta+2*xo-2*yo+2;}
 
 }
 else{xo++;yo--;delta=delta+2*xo-2*yo+2;}
 
 }
  
   g.drawLine(r-xo+xx[0]-r,r-yo+yy[0]-r,r-xo+xx[0]-r,r-yo+yy[0]-r);
  
  
  }while(yo>yo-yo*yay/100);
   
   
   
   
   }
   if(r>0&& yay==0){
   int xo=0;int yo=r;int delta=2-2*r;int limit=0;int ciku;    
       
  
  
  do{
 if(delta<0)
 { ciku=2*delta+2*yo-1;
 if(ciku>0){xo++;yo--;delta=delta+2*xo-2*yo+2;}
 else{xo++;delta=delta+2*xo+1;}
 }
 else{
 if(delta>0){
 ciku=2*delta-2*xo-1;
 if(ciku>0){yo--;delta=delta-2*yo+1;}
 else{xo++;yo--;delta=delta+2*xo-2*yo+2;}
 
 }
 else{xo++;yo--;delta=delta+2*xo-2*yo+2;}
 
 }
  g.drawLine(r-xo+xx[0]-r,r-yo+yy[0]-r,r-xo+xx[0]-r,r-yo+yy[0]-r);
  g.drawLine(xo+r+xx[0]-r,yo+r+yy[0]-r,xo+r+xx[0]-r,yo+r+yy[0]-r);
g.drawLine(r+xo+xx[0]-r,r-yo+yy[0]-r,r+xo+xx[0]-r,r-yo+yy[0]-r);
g.drawLine(r-xo+xx[0]-r,r+yo+yy[0]-r,r-xo+xx[0]-r,r+yo+yy[0]-r);
  }while(yo>limit);
   
   
   
   
   }
 } 

 public void degerleriGir(int xx,int yy,int x,int y,int rr,int yoz) 
 { nny=y;
 nnx=x; 
 nx=xx; 
 ny=yy;
 r=rr;
 yay=yoz;
 repaint(); 
 } 
public void actionPerformed(ActionEvent e) 
{ 
if(e.getSource()==B1) 
{degerleriGir(xx[0],yy[0],xx[1],yy[1],0,0);}  
if(e.getSource()==B2) 
{int ar=Integer.parseInt(T1.getText());
 int arc=Integer.parseInt(T2.getText());
    degerleriGir(xx[0],yy[0],-1,-1,ar,arc);}  


if(e.getSource()==B3) 
{int ar=Integer.parseInt(T1.getText());
    degerleriGir(xx[0],yy[0],-1,-1,ar,0);}  



}

 public void mouseClicked(MouseEvent e) 
 {
 if(say==0){ 
      xx[0]=e.getX();
  yy[0]=e.getY();say=1;
  }
 else if(say==1){ 
      xx[1]=e.getX();
  yy[1]=e.getY();say=0;
   }
 } 
 public void mousePressed(MouseEvent e) 
 { 
  } 

 public void mouseReleased(MouseEvent e) 
 {  } 
 public void mouseEntered(MouseEvent e) 
 { } 
 public void mouseExited(MouseEvent e) 
 { } 
 public void mouseDragged(MouseEvent e) 
 { } 
 public void mouseMoved(MouseEvent e) 
 { } 

}