how to click the Header to sort by this column , on QTreeWidget?

[opengpu2]

how to click the Header to sort by this column , on QTreeWidget?

1. i find that the click on the Header , no reaction.
2. i want to show an up/down arrow on 1 column of the header. how?
3. is there existed method to sort the QTreeWidget by 1 column?

[KeithS]

use setSortingEnabled() on the QTreeView (or QTreeWidget, which is a derived class of QTreeView)

[opengpu2]

is there any existed sort method i can use ?

[opengpu2]

when i setSortingEnabled(true), i can click the header, and it will sort ascending or descengding, but it's just sort by the name, and do not care anything else.
how can i sort by myself when i click the header?
i want to sort by the name on basis of the item type(eg, dir, and files).
thank you