source: lemon-0.x/gui/graph_displayer_canvas-edge.cc @ 1641:77f6ab7ad66f

#include "graph_displayer_canvas.h"
#include "broken_edge.h"
#include <cmath>


int GraphDisplayerCanvas::changeEdgeWidth (std::string mapname, Graph::Edge edge)
{
  Graph::EdgeMap<double> * actual_map;
  double min, max;

  if(mapname=="Default")
    {
      min=edge_property_defaults[E_WIDTH];
      max=edge_property_defaults[E_WIDTH];
      actual_map=new Graph::EdgeMap<double>(mapstorage.graph,edge_property_defaults[E_WIDTH]);
    }
  else
    {
      min=mapstorage.minOfEdgeMap(mapname);
      max=mapstorage.maxOfEdgeMap(mapname);
      actual_map=(mapstorage.edgemap_storage)[mapname];
    }

  if(edge==INVALID)
    {
      for (EdgeIt i(mapstorage.graph); i!=INVALID; ++i)
        {
          double v=fabs((*actual_map)[i]);
          int w;
          if(min==max)
            {
              w=(int)(edge_property_defaults[E_WIDTH]);
            }
          else
            {
              w=(int)(MIN_EDGE_WIDTH+(v-min)/(max-min)*(MAX_EDGE_WIDTH-MIN_EDGE_WIDTH));
            }
          edgesmap[i]->property_width_units().set_value(w);
        }
    }
  else
    {
      int w=(int)(*actual_map)[edge];
      if(w>=0)
        {
          edgesmap[edge]->property_width_units().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>(mapstorage.graph,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(mapstorage.graph); 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(mapstorage.graph); i!=INVALID; ++i)
        {
          if(mapname!="Default")
            {
              edgemap_to_edit=mapname;
              double number=(*(mapstorage.edgemap_storage)[mapname])[i];

              std::ostringstream ostr;
              ostr << number;
              
              edgetextmap[i]->property_text().set_value(ostr.str());
            }
          else
            {
              edgemap_to_edit="";
              edgetextmap[i]->property_text().set_value("");
            }
        }

    }
  else
    {
      if(mapname!="Default")
        {
          double number=(*(mapstorage.edgemap_storage)[mapname])[edge];

          std::ostringstream ostr;
          ostr << number;
          
          edgetextmap[edge]->property_text().set_value(ostr.str());
        }
      else
        {
          edgetextmap[edge]->property_text().set_value("");
        }
          
    }

  return 0;

};