set_sort_func

Description:

public abstract void set_sort_func (int sort_column_id, owned TreeIterCompareFunc sort_func)

Sets the comparison function used when sorting to be sort_func.

If the current sort column id of this is the same as sort_column_id, then the model will sort using this function.

this	A TreeSortable
sort_column_id	the sort column id to set the function for
sort_func	The comparison function
destroy	Destroy notifier of `user_data`, or null
user_data	User data to pass to `sort_func`, or null