On 30-05-2019 22:02, Ron Tarrant wrote:

I did try putting it in a ScrolledWindow, to see if that would clear things up, but I it only showed two lines of the TreeView (with a scrollbar) and spit out a whole other set of errors:

For the errors the fix is the same, call addAttribute after super.

To get the TreeView/ScrolledWindow to use all the available space, set
expand and fill to true in the call to packStart.

packStart(myScrolledWindow, true, true, 0);