On 9/7/18 10:09 AM, Russel Winder wrote:

On Thu, 6 Sep 2018 23:10:24 +0200, Mike Wey wrote:

On 9/6/18 8:29 PM, Russel Winder wrote:
[…]

The problem is that GtkBuilder doesn't instantiate a new
PresentationTreeView but only a TreeView.

And as it should really, that is what is in the Glade file. :-)

You can add your custom widget to Glade if you really want to :D

https://developer.gnome.org/gladeui/unstable/widgetclasses.html