diff -r e2c86ae158cf -r fa28f1071bd6 graph_displayer_canvas-node.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graph_displayer_canvas-node.cc	Fri Jun 24 18:16:12 2005 +0000
@@ -0,0 +1,175 @@
+#include <graph_displayer_canvas.h>
+#include <broken_edge.h>
+#include <math.h>
+
+
+int GraphDisplayerCanvas::changeNodeRadius (std::string mapname, Graph::Node node)
+{
+  if(node==INVALID)
+    {
+      for (NodeIt i(g); i!=INVALID; ++i)
+	{
+	  int w=(int)(*(mapstorage.nodemap_storage)[mapname])[i];
+	  if(w>=0)
+	    {
+	      double x1, y1, x2, y2;
+	      nodesmap[i]->get_bounds(x1, y1, x2, y2);
+	      nodesmap[i]->property_x1().set_value((x1+x2)/2-w);
+	      nodesmap[i]->property_x2().set_value((x1+x2)/2+w);
+	      nodesmap[i]->property_y1().set_value((y1+y2)/2-w);
+	      nodesmap[i]->property_y2().set_value((y1+y2)/2+w);
+	    }
+	}
+    }
+  else
+    {
+      int w=(int)(*(mapstorage.nodemap_storage)[mapname])[node];
+      if(w>=0)
+	{
+	  double x1, y1, x2, y2;
+	  nodesmap[node]->get_bounds(x1, y1, x2, y2);
+	  nodesmap[node]->property_x1().set_value((x1+x2)/2-w);
+	  nodesmap[node]->property_x2().set_value((x1+x2)/2+w);
+	  nodesmap[node]->property_y1().set_value((y1+y2)/2-w);
+	  nodesmap[node]->property_y2().set_value((y1+y2)/2+w);
+	}
+    }
+  return 0;
+};
+
+int GraphDisplayerCanvas::changeNodeColor (std::string mapname, Graph::Node node)
+{  
+
+  //function maps the range of the maximum and
+  //the minimum of the nodemap to the range of
+  //green in RGB
+
+  if(node==INVALID)
+    {
+
+      for (NodeIt i(g); i!=INVALID; ++i)
+	{
+	  double w=(*(mapstorage.nodemap_storage)[mapname])[i];
+	  double max=mapstorage.maxOfNodeMap(mapname);
+	  double min=mapstorage.minOfNodeMap(mapname);
+      
+	  //std::cout<<w<<" "<<max<<" "<<min<<" "<<100*(w-min)/(max-min)<<std::endl;
+	  Gdk::Color color;
+	  if(max!=min)
+	    {
+	      color.set_rgb_p (0, 0, 100*(w-min)/(max-min));
+	    }
+	  else
+	    {
+	      color.set_rgb_p (0, 0, 100);
+	    }
+
+	  nodesmap[i]->property_fill_color_gdk().set_value(color);
+	}
+    }
+  else
+    {
+      double w=(*(mapstorage.nodemap_storage)[mapname])[node];
+      double max=mapstorage.maxOfNodeMap(mapname);
+      double min=mapstorage.minOfNodeMap(mapname);
+      
+      //std::cout<<w<<" "<<max<<" "<<min<<" "<<100*(w-min)/(max-min)<<std::endl;
+      Gdk::Color color;
+      if(max!=min)
+	{
+	  color.set_rgb_p (0, 0, 100*(w-min)/(max-min));
+	}
+      else
+	{
+	  color.set_rgb_p (0, 0, 100);
+	}
+
+      nodesmap[node]->property_fill_color_gdk().set_value(color);
+    }
+  return 0;
+};
+
+int GraphDisplayerCanvas::changeNodeText (std::string mapname, Graph::Node node)
+{
+
+  //the number in the map will be written on the node
+  //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?
+
+  if(node==INVALID)
+    {
+      for (NodeIt i(g); i!=INVALID; ++i)
+	{
+	  if(mapname!=node_property_strings[N_TEXT])
+	    {
+	      double number=(*(mapstorage.nodemap_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;
+		    }
+		}
+      
+	      nodetextmap[i]->property_text().set_value(str);
+	    }
+	  else
+	    {
+	      nodetextmap[i]->property_text().set_value("");
+	    }
+	}
+    }
+  else
+    {
+      if(mapname!=node_property_strings[N_TEXT])
+	{
+	  double number=(*(mapstorage.nodemap_storage)[mapname])[node];
+	  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;
+		}
+	    }
+      
+	  nodetextmap[node]->property_text().set_value(str);
+	}
+      else
+	{
+	  nodetextmap[node]->property_text().set_value("");
+	}
+    }
+  return 0;
+};