// -*- C++ -*- //

#ifndef BROKEN_EDGE_H

#define BROKEN_EDGE_H

class BrokenEdge;

#include <all_include.h>

#include <libgnomecanvasmm.h>

#include <libgnomecanvasmm/polygon.h>

#include <graph_displayer_canvas.h>

#include <lemon/xy.h>

class BrokenEdge : public Gnome::Canvas::Line

{

  GraphDisplayerCanvas & gdc;

  Gnome::Canvas::Polygon * arrow;

  Gnome::Art::Point * my_points;

  ///Indicates whether the button of mouse is pressed or not

  bool isbutton;

  ///At this location was the mousebutton pressed.

  ///It helps to calculate the distance of dragging.

  double clicked_x, clicked_y;

  ///event handler for forming edges

  bool edge_former_event_handler(GdkEvent*);

 public:

  BrokenEdge(Gnome::Canvas::Group &, Gnome::Canvas::Points, GraphDisplayerCanvas &);

  ~BrokenEdge();

  void set_points(Gnome::Canvas::Points, bool move=false);

  xy<double> get_arrow_pos();

};

#endif //BROKEN_EDGE_H