Why is my QTreeView(+ custom qabstractitemmodel) empty?

[feuer]

Hi,

Using this QAbstractItemModel I get an empty QTreeView. I've been banging my head on-and-off for months now with this. Could anyone see what I'm missing?

When I change a line here according to the comment, start using the simple QObject-treemodel as copied from Johan Thelin's book Foundations of Qt Development, QTreeView starts functioning as expected. This leads me to think my model is somehow flawed, but I can't figure out how.

[SGaist]

HI and welcome to devnet,

One fishy thing in your data function: you have if (!role != Qt::DisplayRole) why do you have an exclamation mark before role ?

[feuer]

Goddammit that's it, now it works. Unbelievable how that small exclamation mark caused a few month's worth of grief and wtfs.

Thank you :)