diff -r 9a0e6e92d06c -r b8ec84524fa2 graph_displayer_canvas-node.cc
--- a/graph_displayer_canvas-node.cc	Thu Jul 28 14:31:32 2005 +0000
+++ b/graph_displayer_canvas-node.cc	Thu Jul 28 15:54:00 2005 +0000
@@ -6,12 +6,17 @@
 int GraphDisplayerCanvas::changeNodeRadius (std::string mapname, Graph::Node node)
 {
   Graph::NodeMap<double> * actual_map;
+  double min, max;
   if(mapname=="Default")
     {
+      min=node_property_defaults[N_RADIUS];
+      max=node_property_defaults[N_RADIUS];
       actual_map=new Graph::NodeMap<double>(g,node_property_defaults[N_RADIUS]);
     }
   else
     {
+      min=mapstorage.minOfNodeMap(mapname);
+      max=mapstorage.maxOfNodeMap(mapname);
       actual_map=(mapstorage.nodemap_storage)[mapname];
     }
 
@@ -19,7 +24,16 @@
     {
       for (NodeIt i(g); i!=INVALID; ++i)
 	{
-	  int w=(int)(*actual_map)[i];
+	  double v=abs((*actual_map)[i]);
+	  int w;
+	  if(min==max)
+	    {
+	      w=(int)(node_property_defaults[N_RADIUS]);
+	    }
+	  else
+	    {
+	      w=(int)(MIN_NODE_RADIUS+(v-min)/(max-min)*(MAX_NODE_RADIUS-MIN_NODE_RADIUS));
+	    }
 	  if(w>=0)
 	    {
 	      double x1, y1, x2, y2;