#include <graph_displayer_canvas.h>

 #include <broken_edge.h>

 #include <math.h>

 int GraphDisplayerCanvas::changeLineWidth (std::string mapname)

 {

   for (EdgeIt i(g); i!=INVALID; ++i)

     {

       int w=(int)(*(mapstorage.edgemap_storage)[mapname])[i];

       if(w>=0)

 	{

 	  edgesmap[i]->property_width_pixels().set_value(w);

 	}

     }

   return 0;

 };

 int GraphDisplayerCanvas::changeColor (std::string mapname)

 {  

   //function maps the range of the maximum and

   //the minimum of the nodemap to the range of

   //green in RGB

   for (EdgeIt i(g); i!=INVALID; ++i)

   {

     double w=(*(mapstorage.edgemap_storage)[mapname])[i];

     double max=mapstorage.maxOfEdgeMap(mapname);

     double min=mapstorage.minOfEdgeMap(mapname);

     //std::cout<<w<<" "<<max<<" "<<min<<" "<<100*(w-min)/(max-min)<<std::endl;

     Gdk::Color color;

     if(max!=min)

     {

       color.set_rgb_p (0, 100*(w-min)/(max-min), 0);

     }

     else

     {

       color.set_rgb_p (0, 100, 0);

     }

     edgesmap[i]->property_fill_color_gdk().set_value(color);

   }

   return 0;

 };

 int GraphDisplayerCanvas::changeText (std::string mapname)

 {

   //the number in the map will be written on the edge

   //EXCEPT when the name of the map is Text, because

   //in that case empty string will be written, because

   //that is the deleter map

   //\todo isn't it a bit woodcutter?

   for (EdgeIt i(g); i!=INVALID; ++i)

     {

       if(mapname!="Text")

 	{

 	  double number=(*(mapstorage.edgemap_storage)[mapname])[i];

 	  int length=1;

 	  //if number is smaller than one, length would be negative, or invalid

 	  if(number>=1)

 	    {

 	      length=(int)(floor(log(number)/log(10)))+1;

 	    }

 	  int maxpos=(int)(pow(10,length-1));

 	  int strl=length+1+RANGE;

 	  char * str=new char[strl];

 	  str[length]='.';

 	  str[strl]='\0';

 	  for(int j=0;j<strl;j++)

 	    {

 	      if(j!=length)

 		{

 		  int digit=(int)(number/maxpos);

 		  str[j]=(digit+'0');

 		  number-=digit*maxpos;

 		  number*=10;

 		}

 	    }

 	  edgetextmap[i]->property_text().set_value(str);

 	}

       else

 	{

 	  edgetextmap[i]->property_text().set_value("");

 	}

     }

   return 0;

 };