#define GRAPH_DISPLAYER_CANVAS_H

 #define GRAPH_DISPLAYER_CANVAS_H

 class GraphDisplayerCanvas;

 class GraphDisplayerCanvas;

 #include "all_include.h"

 #include "all_include.h"

 #include <libgnomecanvasmm.h>

 #include <libgnomecanvasmm.h>

 #include <libgnomecanvasmm/polygon.h>

 #include <libgnomecanvasmm/polygon.h>

 #include <lemon/xy.h>

 #include <lemon/xy.h>

 ///This class is the canvas, on which the graph can be drawn.

 ///This class is the canvas, on which the graph can be drawn.

     xy<double> getArrowPos();

     xy<double> getArrowPos();

   };

   };

   typedef Gnome::Canvas::CanvasAA Parent;

   typedef Gnome::Canvas::CanvasAA Parent;

 public:

 public:

   virtual ~GraphDisplayerCanvas();

   virtual ~GraphDisplayerCanvas();

   ///Changes the linewidth attribute according to the given map.

   ///Changes the linewidth attribute according to the given map.

   ///\param mapname is the name of the map which contains the new values

   ///\param mapname is the name of the map which contains the new values

   int changeEdgeWidth (std::string mapname, Edge new_item=INVALID);

   int changeEdgeWidth (std::string mapname, Edge new_item=INVALID);

   static const int zoom_step = 5;

   static const int zoom_step = 5;

 private:

 private:

   ///reference to the parent window

   ///reference to the parent window

 };

 };

 #endif //GRAPH_DISPLAYER_CANVAS_H

 #endif //GRAPH_DISPLAYER_CANVAS_H