GtkTreeViewColumn::set_sort_order
Changes the appearance of the sort indicator.
This does not actually sort the model. Use
set_sort_column_id() if you
want automatic sorting support. This function is primarily for custom
sorting behavior, and should be used in conjunction with
set_sort_column to do that.
For custom models, the mechanism will vary.
The sort indicator changes direction to indicate normal sort or
reverse sort. Note that you must have the sort indicator enabled
to see anything when calling this function; see
set_sort_indicator() .
See also:
get_sort_order()