TRUE, if the model has a default sort function Signal Details The "sort-column-changed" signal void user_function (GtkTreeSortable *sortable, gpointer user_data) : Run Last The ::sort-column-changed signal is emitted when the sort column or sort order of sortable is changed. The signal is emitted before the contents of sortable are resorted.
Returns TRUE if the model has a default sort function. This is used primarily by GtkTreeViewColumns in order to determine if a model can go back to the default state, or not.