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

public class Pildiredaktor3 extends Applet {
  Joonistusala ala=new Joonistusala();
  Teatehaldus th=new Teatehaldus(ala);
  public Pildiredaktor3(){
    setLayout(new BorderLayout());
    add(ala, BorderLayout.CENTER);
    ala.tyhjenda();
    ala.paneVarv(Color.blue);
    ala.addMouseListener(th);
  }
  public static void main(String[] arg){
    Frame f=new Frame("Pildiredaktor");
    f.add(new Pildiredaktor3());
    f.setSize(300, 300);
    f.setVisible(true);
  }
  class Teatehaldus implements MouseListener{
     int algx, algy;
     Joonistusala jAla;
     public Teatehaldus(Joonistusala uusAla){
       jAla=uusAla;
     }
     public void mousePressed(MouseEvent e){
        algx=e.getX(); algy=e.getY();
     }
     public void mouseReleased(MouseEvent e){
        int loppx=e.getX(); int loppy=e.getY();
        jAla.joon(algx, algy, loppx, loppy);
     }
     public void mouseClicked(MouseEvent e){}
     public void mouseEntered(MouseEvent e){}
     public void mouseExited(MouseEvent e){}
  }
  class Joonistusala extends Panel{
     BufferedImage pilt=new BufferedImage(300, 300, 
       BufferedImage.TYPE_INT_RGB);
     Graphics2D piltg=pilt.createGraphics();
     public void paint(Graphics g){
        g.drawImage(pilt, 0, 0, this);
     }
     public void tyhjenda(){
        Color abivarv=piltg.getColor();
        piltg.setColor(Color.white);
        piltg.fillRect(0, 0, 300, 300);
        piltg.setColor(abivarv);
        repaint();
     }
     public void paneVarv(Color varv){
        piltg.setColor(varv);
     }
     public void joon(int x1, int y1, int x2, int y2){
        piltg.drawLine(x1, y1, x2, y2);
        repaint();
     }
  }
}