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