import java.awt.*;
import java.awt.event.*;

enum ZeichenModus {LINIE, RECHTECK, ELLIPSE};

class GrafikFenster extends Frame{
	  private static final long serialVersionUID = 7526471155622776147L;
    private static Button stopButton     = new Button("Stop Button");
    private static Button linieButton    = new Button("Linien malen");
    private static Button RechteckButton = new Button("Rechtecke malen");
    private static Button ellipsenButton = new Button("Ellipsen malen");
    private static Button fillButton = new Button("Gefüllt ?");
   
    private ZeichenModus zModus = ZeichenModus.LINIE;
    private boolean gefüllt = false;
    private int x1;
    private int y1;
    
	GrafikFenster(String title, int breite, int höhe){	
      super(title);
      setLayout(new FlowLayout());
      
      stopButton.addActionListener(new ActionListener() {    
	        public void actionPerformed(ActionEvent event) { fensterBeenden(); }
		    });
      add(stopButton);
      
      linieButton.addActionListener(new ActionListener() {    
	        public void actionPerformed(ActionEvent event) { zModus = ZeichenModus.LINIE; }
		    });
		  add(linieButton );

      RechteckButton.addActionListener(new ActionListener() {    
	        public void actionPerformed(ActionEvent event) { zModus = ZeichenModus.RECHTECK; }
		    });
		  add(RechteckButton );

      ellipsenButton.addActionListener(new ActionListener() {    
	        public void actionPerformed(ActionEvent event) { zModus = ZeichenModus.ELLIPSE; }
		    });
		  add(ellipsenButton );
		  
		  fillButton.addActionListener(new ActionListener() {    
	        public void actionPerformed(ActionEvent event) { gefüllt = !gefüllt; }
		    });
		  add(fillButton );
		  
		addMouseListener(new MouseAdapter() { 
			public void mousePressed(MouseEvent e){ 
				x1 = e.getX(); y1 = e.getY(); }
			public void mouseReleased(MouseEvent e){
				int x2 = e.getX(); int y2 = e.getY();
				Graphics g = getGraphics();
				g.setColor(Color.blue);
				if (zModus == ZeichenModus.LINIE) g.drawLine(x1, y1, x2, y2);
				else {
					int w= Math.abs(x1 - x2);
					int h= Math.abs(y1 - y2);
					int x= Math.min(x1, x2);
					int y= Math.min(y1, y2);
					if (zModus == ZeichenModus.RECHTECK) 
          	if (gefüllt)g.fillRect(x, y, w, h); 
          	else g.drawRect(x, y, w, h);
        	else if (zModus == ZeichenModus.ELLIPSE)
          	if (gefüllt)g.fillOval(x, y, w, h); 
          	else g.drawOval(x, y, w, h);
					}
				}
			});
      addWindowListener(new WindowAdapter() {    
        public void windowClosing(WindowEvent e) { fensterBeenden(); }
	    });
	    
      setBackground(Color.lightGray);
      setSize(breite, höhe);
	    setVisible(true);
      }

    void fensterBeenden() {		        
	  dispose();
	  }	  
}

class FensterTester {

    public static void main(String args[]) {
        GrafikFenster mainFenster = new GrafikFenster("Fenstermaler",800,600);
        }
}