Re: [Boost-users] Derive from adjacency_list

From: Olivier Tournaire (olitour_at_[hidden])
Date: 2007-11-09 13:47:54

OK, I found the solution :

for(boost::tie(first, last)=edges(*this);first!=last;++first)

instead of

for(boost::tie(first, last)=edges(this);first!=last;++first)

2007/11/9, Olivier Tournaire <olitour_at_[hidden]>:
>
> Hi all,
>
> I want to derive a class from adjacency_list :
>
> template <class NodesContainer = boost::vecS,
>           class EdgesContainer = boost::vecS,
>           class Directed = boost::undirectedS,
>           class NodesAttributes = boost::no_property,
>           class EdgesAttributes = boost::no_property
>          > class BGL_Graph : public boost::adjacency_list<NodesContainer,
>                                                           EdgesContainer,
>                                                           Directed,
>                                                           NodesAttributes,
>                                                           EdgesAttributes
>                                                          >
> {
>  /// ... many typedefs
>  /// ...
> };
>
> I also have an other derived class from BGL_Graph :
>
> class MPPRectangleGraph : public
> BGL_Graph<boost::vecS,boost::vecS,boost::undirectedS,MPPRectangleGraphNode,Weight>
>
> {
> public:
>     MPPRectangleGraph() {is_init_ = false;};
>     ~MPPRectangleGraph();
>
>     void InitDisplay(std::string name = "MPP",
>                      unsigned int width = 200,
>                      unsigned int height = 200);
>     void Draw( unsigned int flags = DRAW_NOTHING);
>     void Display( unsigned int flags = DRAW_NOTHING );
>
> protected:
> private:
>     bool is_init_;
>     IdFenetreCalques window_;
>     IdCalqueVecteur layer_rectangle_;
>     IdCalqueVecteur layer_profiles_;
>     IdCalqueVecteur layer_neighborhood_;
>     IdCalqueVecteur layer_edges_;
> };
>
> My problem is how can I iterate on the edges in a method of
> MPPRectangleGraph  ?
>
> void MPPRectangleGraph::Draw( unsigned int flags )
> {
>     // On recupere les differents flags d'affichage
>     bool draw_rect = false, draw_profiles = false, draw_neighborhood =
> false, draw_edges = false;
>     if ( flags&DRAW_RECTANGLE )
>         draw_rect = true;
>     if ( flags&DRAW_PROFILES )
>         draw_profiles = true;
>     if ( flags&DRAW_NEIGHBORHOOD )
>         draw_neighborhood = true;
>     if ( flags&DRAW_EDGES )
>         draw_edges = true;
>
>     // On vide tous les calques
>     layer_rectangle_.Clear();
>     layer_profiles_.Clear();
>     layer_neighborhood_.Clear();
>     layer_edges_.Clear();
>
>     // On fait l'affichage en fonction des flags recuperes
>     // Les aretes
>     MPPRectangleGraph::edge_iterator first, last;
>     for(boost::tie(first, last)=edges(this);first!=last;++first) // does
> not work !
>     {
>         //std::cout << boost::source(*first, g) << " to " <<
> boost::target(*first, g) << " = ";
>     }
> }
>
> Regards
>
>
> --
> Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des
> noyaux. Courage.

-- 
Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des noyaux.
Courage.