sections_changed
Description:
Emitted when the start-of-section state of some of the items in model changes.
Note that this signal does not specify the new section state of the items, they need to be queried manually. It is also not necessary for a model to change the section state of any of the items in the section model, though it would be rather useless to emit such a signal.
The [signal@Gio.ListModel:GtkSectionModel:items-changed] implies the effect of the [signal@Gtk.SectionModel:
GtkSectionModel:sections-changed] signal for all the items it covers.
Parameters:
| position |
The first item that may have changed |
| n_items |
number of items with changes |