[gtkmm] 2 questions about treeview and sorting

["B.Hakvoort" <bart hakvoort be>]

Hi,

As subject indicates i have two questions about the sortingbehaviour of
the treeview.

1.Is it possible to sort only parentnodes and leave the childs alone?
atm i use set_sort_column_id(<column>, Gtk::SORT_ASCENDING) and this
sorts all rows in the view.

2.When calling set_sort_indicator() to get that nice little arrow in the
header, it'll also grey the whole sorted column. This isn't really a
problem, but it is quite annoying. Maybe it isn't gtkmm, but merely a
theme-setting? ( cannot test this from where i am )

Thanks for any idea's/answers,

Bart