///\ref MapWin calls this function when it updates the maplist in comboboxes.

   ///\ref MapWin calls this function when it updates the maplist in comboboxes.

   void active_maps_needed();

   void active_maps_needed();

 private:

 private:

   ///Signal connection from \ref MapStorage to \ref MapWin

   ///Signal connection from \ref MapStorage to \ref MapWin

   ///If \ref MapWin is closed this connection has to be disconnected,

   ///If \ref MapWin is closed this connection has to be disconnected,

   ///therefore we have to store it.

   ///therefore we have to store it.

   sigc::connection mapst2mapwin;

   sigc::connection mapst2mapwin;