Method OnDropdownSelect

src/vehicle_gui.cpp:2174–2212

	}

	void OnDropdownSelect(WidgetID widget, int index, int) override
	{
		switch (widget) {
			case WID_VL_GROUP_BY_PULLDOWN:
				this->UpdateVehicleGroupBy(static_cast<GroupBy>(index));
				break;

			case WID_VL_SORT_BY_PULLDOWN:
				this->vehgroups.SetSortType(index);
				break;

			case WID_VL_FILTER_BY_CARGO:
				this->SetCargoFilter(index);
				break;

			case WID_VL_MANAGE_VEHICLES_DROPDOWN:
				assert(!this->vehicles.empty());

				switch (index) {
					case ADI_REPLACE: // Replace window
						ShowReplaceGroupVehicleWindow(ALL_GROUP, this->vli.vtype);
						break;
					case ADI_SERVICE: // Send for servicing
					case ADI_DEPOT: // Send to Depots
						Command<CMD_SEND_VEHICLE_TO_DEPOT>::Post(GetCmdSendToDepotMsg(this->vli.vtype), VehicleID::Invalid(), (index == ADI_SERVICE ? DepotCommandFlag::Service : DepotCommandFlags{}) | DepotCommandFlag::MassSend, this->vli);
						break;

					case ADI_CREATE_GROUP: // Create group
						Command<CMD_ADD_VEHICLE_GROUP>::Post(CcAddVehicleNewGroup, NEW_GROUP, VehicleID::Invalid(), false, this->vli);
						break;

					default: NOT_REACHED();
				}
				break;

			default: NOT_REACHED();
		}
		this->SetDirty();
	}

	void OnGameTick() override
	{