Re: Hidden Columns in Gtk::TreeView

[Nathan Hüsken <gtkmm lonely-star org>]

Oh ... I feel stupid. Yes, that was the problem. I forget to link in 
the library, in wich
the default contructor is implemented.
Thanks a lot!
Nathan

Quoting Armin Burgmeier <armin arbur net>:

Did you declare a rythem_pattern default constructor but did not
implement one (I assume rythem_pattern is the type of the hidden column
you want to add)?