import java.awt.*;
import java.awt.image.*;

public class Tah04 extends Canvas{
 int vx, vy, ux, uy, ax, ay, laius, korgus;
 int op=1;
 Image pilt, sahver;
 String lause=" ";
 Graphics piltg, sahverg;
 Tah04(int w, int h){
//   resize(w, h);
this.reshape(0, 0, w, h); 
  laius=w; korgus=h;   
   setBackground(Color.white);


 }
 public boolean mouseDown(Event e, int x, int y){
  ux=x; uy=y;
  ax=x; ay=y;
sahverg.drawImage(pilt, 0, 0, this); 
  return super.mouseDown(e, x, y);
 }




 public boolean mouseDrag(Event e, int x, int y){
 vx=ux; vy=uy;
 ux=x; uy=y;
 if(op==1){ piltg.drawLine(vx, vy, ux, uy);}
 if(op==2)
{piltg.drawImage(sahver, 0, 0 , null);
piltg.drawLine(ax, ay, ux, uy);}
if(op==4){siseruutjuur();}
 repaint();
 return super.mouseDrag(e, x, y);
 }


public boolean keyDown(Event e, int key){
if(op==3){
if((char)e.key=='\177'){if(lause.length()>0)
{lause=lause.substring(0, lause.length()-1);}}
else{
lause=lause+String.valueOf((char)e.key);}
piltg.drawImage(sahver, 0, 0, null);
piltg.drawString(lause, ax, ay);
repaint();
}
return super.keyDown(e, key);
}


public void siseruutjuur(){
int dx, dy;
dx=ux-ax; dy=uy-ay;
piltg.drawImage(sahver, 0, 0, null);
piltg.drawLine(ax, (int)(ay+dy*0.5),(int)(1+ax+0.05*dx), uy );
piltg.drawLine((int)(1+ax+0.05*dx), uy,(int)(3+ax+0.1*dx), ay );
piltg.drawLine((int)(3+ax+0.1*dx), ay ,(int)(ux-0.05*dx-1), ay );
piltg.drawLine((int)(ux-0.05*dx-1), ay, ux, (int)(ay+0.3*dy) );

}


public void seaVarv(Color co){
piltg.setColor(co);}

public void tagasi(){
piltg.drawImage(sahver, 0, 0, null);
repaint();}

public void joon(){
op=2;}

public void sodi(){op=1;}

public void kirjuta(){op=3;
lause=" ";}

public void ruutjuur(){op=4;}

 public void update(Graphics g){

// g.clipRect(Math.min(vx, ux)-1, Math.min(vy, uy)-1, Math.abs(vx-ux)+100, Math.abs(vy-uy)+100);
// g.clipRect(0, 0, 50, 30);
 paint(g);

 }

 public void paint(Graphics g){
 if (pilt==null){
   pilt=createImage(size().width, size().height);
   piltg=pilt.getGraphics();
   piltg.setColor(Color.black);
   sahver=createImage(size().width, size().height);
   sahverg=sahver.getGraphics();

   }
  g.drawImage(pilt, 0, 0, null);
 }


/* public  void  handleSinglePixel(int  x,  int  y,  int  pixel, TextArea area)  {
        int  alpha  =  (pixel  >>  24)  &  0xff;
        int  red      =  (pixel  >>  16)  &  0xff;
        int  green  =  (pixel  >>    8)  &  0xff;
        int  blue    =  (pixel            )  &  0xff;
        area.appendText(red+"\n");
        //  Deal  with  the  pixel  as  necessary...
}*/

public  String  pildistring()  {
        int[]  pixels  =  new  int[laius*korgus];
        char c[] = new char[laius*korgus];
        int ik=0;
        String s="";
        PixelGrabber  pg  =  
                new  PixelGrabber(pilt,  0, 0,   laius,  korgus,  pixels,  0,  laius);
        try  {
                pg.grabPixels();
        }  catch  (InterruptedException  e)  {
                System.err.println("interrupted  waiting  for  pixels!");
                return "x";
        }
        if  ((pg.status()  &  ImageObserver.ABORT)  !=  0)  {
              System.err.println("image  fetch  aborted  or  errored");
              return "x";
        }
        for  (int  j  =  0;  j  <  korgus;  j++)  {
                for  (int  i  =  0;  i  <  laius;  i++)  {
                        // look at the pixel
//        int  red      =  (pixel  >>  16)  &  0xff;
if (((pixels[j * laius + i] >> 16) & 0xff)==0){c[ik++]='m';}
else if (((pixels[j * laius + i] >> 16) & 0xff)==255){c[ik++]='v';}
else {c[ik++]='k';}

                }
        }
s=new String(c);
return s;
}


public void stringipilt(String s){
Image abi;
    int[]  pixels  =  new  int[laius*korgus];
    char c[]=new char[laius*korgus];
    int i, p;
    c=s.toCharArray();
    p=s.length();
    for(i=0; i<p; i++){
    if(c[i]=='m'){pixels[i]=255<<24 | 0 << 16 | 0 << 8 | 0;}
else if(c[i]=='v'){pixels[i]=255<<24 | 255 << 16 | 255 << 8 | 255;}
else {pixels[i]=255<<24 | 100 << 16 | 100 << 8 | 100;}
}
abi=createImage( new MemoryImageSource(laius, korgus, pixels, 0, laius));
piltg.drawImage(abi, 0, 0, null);
repaint();



}


}