GListModel* gtk_widget_observe_controllers ( GtkWidget* widget )
GListModel to track the
Calling this function will enable extra internal bookkeeping to track controllers and emit signals on the returned listmodel. It may slow down operations a lot.
Applications should try hard to avoid calling this function because of the slowdowns.
|Returns:||A list model of
|The caller of the method takes ownership of the data, and is responsible for freeing it.|