- Event sender.
- Event arguments.
The EntryCompletion.ActionActivated event utilizes this delegate:
Event data is passed via the Gtk.ActionActivatedArgs parameter.
To attach a Gtk.ActionActivatedHandler to an event, add the ActionActivatedHandler instance to the event. The methods referenced by the ActionActivatedHandler instance are invoked whenever the event is raised, until the ActionActivatedHandler is removed from the event.