Gtk.CustomSorter.set_sort_func

### Method

# Gtk CustomSorterset_sort_func

#### Declaration [src]

    void
    gtk_custom_sorter_set_sort_func (
      GtkCustomSorter* self,
      GCompareDataFunc sort_func,
      gpointer user_data,
      GDestroyNotify user_destroy
    )

#### Description [src]

Sets (or unsets) the function used for sorting items.

If `sort_func` is `NULL`, all items are considered equal.

If the sort func changes its sorting behavior, `gtk_sorter_changed()` needs to be called.

If a previous function was set, its `user_destroy` will be called now.

#### Parameters

`sort_func` | `GCompareDataFunc`
| Function to sort items.
`user_data` | `gpointer`
| User data to pass to `match_func`.
`user_destroy` | `GDestroyNotify`
| Destroy notify for `user_data`.