Re: [gtkmm] Gtk::TreeView

[Matthew Walton <matthew alledora co uk>]

Benoît Touron wrote:

> Hello everybody !
>
> I am new to Gtkmm. I searched in the documentation, and in the mailing 
> list archive, without success.
>
> So, in a TreeView, how can I display the connecting lines between the 
> nodes ?
> Is it an option somewhere in the TreeView ?

As I understand it, in GTK+ 2 it's impossible to display connecting 
lines in a TreeView in the manner see in, say, the GTK+ 1.x CTree, or 
the Win32 tree control. That's not just a matter of the theme engine not 
drawing them, but the toolkit not supporting it (not entirely sure, but 
that's the impression I got from an interview with one of the GTK+ 
developers recently).

So the short answer is that, unfortunately, you can't. I'm hoping 
somebody will make a patch to allow theme engines to draw those lines if 
they wish, as sometimes I'd really rather like to have them.