diff -r 389a94a1d9eb -r f9113440b667 gui/graph_displayer_canvas.cc
--- a/gui/graph_displayer_canvas.cc	Tue Jun 21 15:58:57 2005 +0000
+++ b/gui/graph_displayer_canvas.cc	Thu Jun 23 17:56:24 2005 +0000
@@ -95,10 +95,13 @@
 int GraphDisplayerCanvas::changeLineWidth (std::string mapname)
 {
   for (EdgeIt i(g); i!=INVALID; ++i)
-  {
-    int w=(int)(*(mapstorage.edgemap_storage)[mapname])[i];
-    edgesmap[i]->property_width_pixels().set_value(w);
-  }
+    {
+      int w=(int)(*(mapstorage.edgemap_storage)[mapname])[i];
+      if(w>=0)
+	{
+	  edgesmap[i]->property_width_pixels().set_value(w);
+	}
+    }
   return 0;
 };
 
@@ -141,35 +144,40 @@
   //\todo isn't it a bit woodcutter?
 
   for (EdgeIt i(g); i!=INVALID; ++i)
-  {
-    if(mapname!="Text")
     {
-      double number=(*(mapstorage.edgemap_storage)[mapname])[i];
-      int 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';
+      if(mapname!="Text")
+	{
+	  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;
-        }
-      }
+	  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);
+	  edgetextmap[i]->property_text().set_value(str);
+	}
+      else
+	{
+	  edgetextmap[i]->property_text().set_value("");
+	}
     }
-    else
-    {
-      edgetextmap[i]->property_text().set_value("");
-    }
-  }
   return 0;
 };
 
@@ -475,6 +483,9 @@
 
       active_node=NodeIt(g,g.addNode());
 
+      //initiating values corresponding to new node in maps
+      
+
       window_to_world (e->button.x, e->button.y, clicked_x, clicked_y);
 
       nodesmap[active_node]=new Gnome::Canvas::Ellipse(displayed_graph, clicked_x-20, clicked_y-20, clicked_x+20, clicked_y+20);
@@ -516,7 +527,7 @@
   switch(e->type)
     {
     case GDK_BUTTON_PRESS:
-      //in edge creatino right button has special meaning
+      //in edge creation right button has special meaning
       if(e->button.button!=3)
 	{
 	  //there is not yet selected node
@@ -569,6 +580,9 @@
 
 		  //creating new edge
 		  active_edge=EdgeIt(g,g.addEdge(active_node, target_node));
+
+		  //initiating values corresponding to new edge in maps
+		  mapstorage.init_maps_for_edge(active_edge);
 	  
 		  //calculating coordinates of new edge
 		  Gnome::Canvas::Points coos;