1.1 --- a/gui/mapstorage.cc	Wed Jul 27 11:19:35 2005 +0000
     1.2 +++ b/gui/mapstorage.cc	Wed Jul 27 11:35:13 2005 +0000
     1.3 @@ -6,14 +6,22 @@
     1.4  
     1.5  int MapStorage::addNodeMap(const std::string & name, Graph::NodeMap<double> *nodemap)
     1.6  {
     1.7 -  nodemap_storage[name]=nodemap;
     1.8 -  return 0;
     1.9 +  if( nodemap_storage.find(name) == nodemap_storage.end() )
    1.10 +    {
    1.11 +      nodemap_storage[name]=nodemap;
    1.12 +      return 0;
    1.13 +    }
    1.14 +  return 1;
    1.15  }
    1.16  
    1.17  int MapStorage::addEdgeMap(const std::string & name, Graph::EdgeMap<double> *edgemap)
    1.18  {
    1.19 -  edgemap_storage[name]=edgemap;
    1.20 -  return 0;
    1.21 +  if( edgemap_storage.find(name) == edgemap_storage.end() )
    1.22 +    {
    1.23 +      edgemap_storage[name]=edgemap;
    1.24 +      return 0;
    1.25 +    }
    1.26 +  return 1;
    1.27  }
    1.28  
    1.29  double MapStorage::maxOfNodeMap(const std::string & name)