/* -*- C++ -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library

 *

 * Copyright (C) 2003-2006

 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

 * (Egervary Research Group on Combinatorial Optimization, EGRES).

 *

 * Permission to use, modify and distribute this software is granted

 * provided that this copyright notice appears in all copies. For

 * precise terms see the accompanying LICENSE file.

 *

 * This software is provided "AS IS" with no warranty of any kind,

 * express or implied, and with no claim as to its suitability for any

 * purpose.

 *

 */

#include "graph_displayer_canvas.h"

#include <cmath>

const int minimum_edge_width=0;

int GraphDisplayerCanvas::resetEdgeWidth (Edge edge)

{

  double min, max;

  min=edge_property_defaults[E_WIDTH];

  max=edge_property_defaults[E_WIDTH];

  Graph::EdgeMap<double> actual_map((mytab.mapstorage).graph,edge_property_defaults[E_WIDTH]);

  if(edge==INVALID)

    {

      for (EdgeIt i((mytab.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));

	    }

	  if(zoomtrack)

	    {

	      double actual_ppu=get_pixels_per_unit();

	      w=(int)(w/actual_ppu*fixed_zoom_factor);

	    }

	  edgesmap[i]->setLineWidth(w);

	}

    }

  else

    {

      int w=(int)actual_map[edge];

      if(w>=0)

	{

	  edgesmap[edge]->setLineWidth(w);

	}

    }

  return 0;

}

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

{

  Graph::EdgeMap<double> * actual_map;

  double min, max;

  min=(mytab.mapstorage).minOfEdgeMap(mapname);

  max=(mytab.mapstorage).maxOfEdgeMap(mapname);

  actual_map=((mytab.mapstorage).edgemap_storage)[mapname];

  if(edge==INVALID)

    {

      for (EdgeIt i((mytab.mapstorage).graph); i!=INVALID; ++i)

	{

	  double v=(*actual_map)[i];

	  int w;

	  if(autoscale)

	    {

	      if(min==max)

		{

		  w=(int)(edge_property_defaults[E_WIDTH]);

		}

	      else

		{

		  w=(int)(minimum_edge_width+(v-min)/(max-min)*(edge_width-minimum_edge_width));

		}

	    }

	  else

	    {

	      w=(int)(v*edge_width);

	    }

	  if(w<0)

	    {

	      edgesmap[i]->hide();

	    }

	  else

	    {

	      edgesmap[i]->show();

	      if(w<minimum_edge_width)

		{

		  w=minimum_edge_width;

		}

	      if(zoomtrack)

		{

		  double actual_ppu=get_pixels_per_unit();

		  w=(int)(w/actual_ppu*fixed_zoom_factor);

		}

	      edgesmap[i]->setLineWidth(w);

	    }

	}

    }

  else

    {

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

      if(w>=0)

	{

	  edgesmap[edge]->setLineWidth(w);

	}

    }

  return 0;

};

int GraphDisplayerCanvas::changeEdgeColor (std::string mapname, 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;

  actual_map=((mytab.mapstorage).edgemap_storage)[mapname];

  double max, min;

  max=(mytab.mapstorage).maxOfEdgeMap(mapname);

  min=(mytab.mapstorage).minOfEdgeMap(mapname);

  if(edge==INVALID)

    {

      for (EdgeIt i((mytab.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]->setFillColor(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]->setFillColor(color);

    }

  return 0;

};

int GraphDisplayerCanvas::resetEdgeColor (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((mytab.mapstorage).graph,edge_property_defaults[E_COLOR]);

  double max, min;

  max=edge_property_defaults[E_COLOR];

  min=edge_property_defaults[E_COLOR];

  if(edge==INVALID)

    {

      for (EdgeIt i((mytab.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]->setFillColor(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]->setFillColor(color);

    }

  return 0;

};

int GraphDisplayerCanvas::changeEdgeText (std::string mapname, 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((mytab.mapstorage).graph); i!=INVALID; ++i)

	{

	  edgemap_to_edit=mapname;

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

	  std::ostringstream ostr;

	  ostr << number;

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

	}

    }

  else

    {

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

	  std::ostringstream ostr;

	  ostr << number;

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

    }

  return 0;

};

int GraphDisplayerCanvas::resetEdgeText (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((mytab.mapstorage).graph); i!=INVALID; ++i)

	{

	  edgemap_to_edit="";

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

	}

    }

  else

    {

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

    }

  return 0;

};