connectSectionsChanged
open fun connectSectionsChanged(connectFlags: <Error class: unknown class> = ConnectFlags(0u), handler: (<Error class: unknown class>, <Error class: unknown class>) -> Unit): <Error class: unknown class>
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::items-changed implies the effect of the signal@Gtk.SectionModel::sections-changed signal for all the items it covers.
Since
4.12
Parameters
connectFlags
A combination of ConnectFlags
handler
the Callback to connect. Params: position The first item that may have changed; nItems number of items with changes