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