void popup_level_meter_menu (GdkEventButton* ev);
void add_level_meter_type_item (Gtk::Menu_Helpers::MenuList&, Gtk::RadioMenuItem::Group&, std::string const &, ARDOUR::MeterType);
void popup_level_meter_menu (GdkEventButton* ev);
void add_level_meter_type_item (Gtk::Menu_Helpers::MenuList&, Gtk::RadioMenuItem::Group&, std::string const &, ARDOUR::MeterType);