public FormServiceAVehicle(VehicleRentalManagement mangerInstance, Vehicle vehicleInstance)
{
InitializeComponent();
this.manager = mangerInstance;
this.vehicleNeedServicing = vehicleInstance;
this.serviceLog = vehicleNeedServicing.GetServiceHistory;
this.serviceLog.RegisterObserver(this);
this.EngineStateComboBox.Text = vehicleNeedServicing.EngineState.ToString();
this.TranmissionStateComboBox.Text = vehicleNeedServicing.TransmissionState.ToString();
this.TiresStateComboBox.Text = vehicleNeedServicing.TiresState.ToString();
PopulateComboboxOption();
DisplayPossibleServices();
Display();
// Load combobox options to manually set the states of the vehicle part:
}
// Implementing the interface IObserver:
public void Update(ISubject subject)
{
serviceLog = (ServiceHistory)subject;
Display();
}