QTreeView and StylingSheets for QTreeView

[anda_skoa]

Just wondering if setHeaderData() actually works on a Qfilesystemmodel, or if I'm doing something wrong somewhere. Wondering if the default headers are even editable.

Could very likely be the case that these are not modifyable.
Hence the suggestion to overwrite headerData().

Can you explain this a bit more please? How do I reimplement headerData() ? Do you mean subClass QFileSystemModel?

Yes.
Derive from (create a subclass of) the model class, then provide your own headerData() method.

Cheers,
_