#include <graph_displayer_canvas.h>

#include <broken_edge.h>

#include <math.h>

int GraphDisplayerCanvas::changeEdgeWidth (std::string mapname, Graph::Edge edge)

{

  Graph::EdgeMap<double> * actual_map;

  if(mapname=="Default")

    {

      actual_map=new Graph::EdgeMap<double>(g,edge_property_defaults[E_WIDTH]);

    }

  else

    {

      actual_map=(mapstorage.edgemap_storage)[mapname];

    }

  if(edge==INVALID)

    {

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

	{

	  int w=(int)(*actual_map)[i];

	  if(w>=0)

	    {

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

	    }

	}

    }

  else

    {

      int w=(int)(*actual_map)[edge];

      if(w>=0)

	{

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

	}

    }

  return 0;

};

int GraphDisplayerCanvas::changeEdgeColor (std::string mapname, Graph::Edge edge)

{  

  //function maps the range of the maximum and

  //the minimum of the nodemap to the range of

  //green in RGB

  Graph::EdgeMap<double> * actual_map;

  if(mapname=="Default")

    {

      actual_map=new Graph::EdgeMap<double>(g,edge_property_defaults[E_COLOR]);

    }

  else

    {

      actual_map=(mapstorage.edgemap_storage)[mapname];

    }

  double max, min;

  if(mapname!="Default")

    {

      max=mapstorage.maxOfEdgeMap(mapname);

      min=mapstorage.minOfEdgeMap(mapname);

    }

  else

    {

      max=edge_property_defaults[E_COLOR];

      min=edge_property_defaults[E_COLOR];

    }

  if(edge==INVALID)

    {

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

	{

	  double w=(*actual_map)[i];

	  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);

	}

    }

  else

    {

      Gdk::Color color;

      double w=(*actual_map)[edge];

      if(max!=min)

	{

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

	}

      else

	{

	  color.set_rgb_p (0, 100, 0);

	}

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

    }

  return 0;

};

int GraphDisplayerCanvas::changeEdgeText (std::string mapname, Graph::Edge edge)

{

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

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

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

  //that is the deleter map

  if(edge==INVALID)

    {

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

	{

	  if(mapname!="Default")

	    {

	      edgemap_to_edit=mapname;

	      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)

		    {

		      if((number-(int)number)>ALMOST_ONE)

			{

			  number=round(number);

			}

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

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

		      number-=digit*maxpos;

		      number*=10;

		    }

		}

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

	    }

	  else

	    {

	      edgemap_to_edit="";

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

	    }

	}

    }

  else

    {

      if(mapname!="Default")

	{

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

	  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)

		{

		  if((number-(int)number)>ALMOST_ONE)

		    {

		      number=round(number);

		    }

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

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

		  number-=digit*maxpos;

		  number*=10;

		}

	    }

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

	}

      else

	{

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

	}

    }

  return 0;

};