#include <FL/Fl.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Double_Window.H>
#include <FL/fl_draw.H>
#include <cstdio>

class Drawing : public Fl_Widget 
{
	public:
		Drawing(int x,int y,int w,int h);
	private:
  		int x1, y1, x2, y2, modo;
  		void draw(); 
  		int handle(int evento);
	   enum {PRIMER_PUNTO, SEGUNDO_PUNTO, ARRASTRE}; // estados 
};