source: lemon-0.x/gui/graph_displayer_canvas-edge.cc @ 1579:ed7da82bbecf

#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 Text, 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)
                    {
                      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)
                {
                  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;

};