public class polux implements PlugIn { 

  public int flag ;
  public int i=1 ;


  public void run(String arg) 
  { 
    WindowManager.closeAllWindows();  
    IJ.open("C:\\Documents and Settings\\Flou\\Bureau\\Stage CHU\\IMAGES FOIE\\bonard\\Bonard076005.JPEG");
    ImagePlus img = WindowManager.getCurrentImage();
    ImageCanvas pp = new ImageCanvas(img);
        
    pp.addMouseListener(new MouseAdapter(){

    public void mouseExited(MouseEvent e) 
        {
        IJ.showMessage("exit"); 
        flag = 0;
        }

     public void mouseEntered(MouseEvent e) 
        {
        IJ.showMessage("enter"); 
        flag = 1;

        }
    });

    IJ.setTool(4);      //PERMET DE SELECTIONNER LA LIGNE pour tracer

    Toolkit.getDefaultToolkit().addAWTEventListener(new MyListener(flag), AWTEvent.MOUSE_EVENT_MASK); 
       
     IJ.showMessage("Toolkit fin");
  }
}

class MyListener implements AWTEventListener {


       public static int flag;	
       public MyListener(int flag){
       this.flag=flag;   }
       public  static int i=0;
                
                
       public void eventDispatched(AWTEvent event) {
                        
           {if (event.getID() == MouseEvent.MOUSE_RELEASED){
               MouseEvent keyEvent = (MouseEvent) event;
                        
               if (flag == 0){
                  
                   IJ.run("Draw");
                   i=i+1;
                   String txt_i = Integer.toString(i);	
                   //IJ.showMessage(txt_i);
                   if (i==3)
                       {IJ.showMessage("ca marche");
                       
                       }
                   else{IJ.showMessage("merde");}
                  
               } 
               else{
                                          
               }
           }
           }
       }
 }