Re: What means "assertion widget->parent == NULL' failed" ?

["Timothy M. Shead" <tshead k-3d com>]

Herbert Haas wrote:


> Since I am relatively new to gtk, I do not really understand the
> class-hierarchy if gtk. I have some experiences in C++ but I do not
> fully understand the concepts of the gtk widget tree.
>
> My question is: Can you give me an URL / RTFM-Hint or something else to get
> more familiar with gtk. Or is the turorial and the refernce pages the only
> source of information?

The GTK+ object system does a nice job of implementing some OO concepts 
in C that C++ programmers take for granted, including inheritance. 
Havoc Pennington's book covers it all in detail: 
http://developer.gnome.org/doc/GGAD

There are a handful items in the widget hierarchy that I feel don't 
belong where they are - if GtkCombo, GtkFontSelection, et al are the 
source of your confusion, you're not alone :)

Regards,
Timothy M. Shead
tshead k-3d com