TreeViewColumn.setSortOrder

Changes the appearance of the sort indicator.

This does not actually sort the model. Use [gtk.tree_view_column.TreeViewColumn.setSortColumnId] if you want automatic sorting support. This function is primarily for custom sorting behavior, and should be used in conjunction with [gtk.tree_sortable.TreeSortable.setSortColumnId] 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 [gtk.tree_view_column.TreeViewColumn.setSortIndicator].