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