private void Update <T0, T1>(string propertyName, ItemListViewModel <T0> parent, ItemListViewModel <T1> child, Action loadAction)
where T0 : class
where T1 : class
{
if (propertyName == "SelectedItem")
{
if (parent.SelectedItem == null)
{
child.SetItems(Enumerable.Empty <T1>());
}
else
{
loadAction();
}
}
}
public ArcDurationCalculationViewModel(IEventAggregator eventAggregator, IDataService dataService, ICalculatorService calculatorService, IUnityContainer unityContainer)
{
//events
_eventAggregator = eventAggregator;
_eventAggregator.GetEvent <CalculationInputUpdated>().Subscribe(UpdateCalculationInput);
_eventAggregator.GetEvent <CalculationOutputUpdated>().Subscribe(UpdateCalculationOutput);
_eventAggregator.GetEvent <ArcDurationUpdated>().Subscribe(UpdateArcDuration);
//data service
_dataService = dataService;
//calc service
_calculatorService = calculatorService;
//container
_unityContainer = unityContainer;
Manufacturers = new ItemListViewModel <Manufacturer>();
BreakerStyles = new ItemListViewModel <BreakerStyle>();
TripUnitTypes = new ItemListViewModel <TripUnitType>();
LongTimeDelays = new ItemListViewModel <LongTimeDelay>();
ShortTimePickups = new ItemListViewModel <ShortTimePickup>();
ShortTimeDelays = new ItemListViewModel <ShortTimeDelay>();
Instantaneous = new ItemListViewModel <Instantaneous>();
Manufacturers.PropertyChanged += (s, e) => Update(e.PropertyName, Manufacturers, BreakerStyles, LoadBreakerTypes);
BreakerStyles.PropertyChanged += (s, e) => Update(e.PropertyName, BreakerStyles, TripUnitTypes, LoadTripUnitTypes);
TripUnitTypes.PropertyChanged += (s, e) => Update(e.PropertyName, TripUnitTypes, LongTimeDelays, LoadLongTimeDelays);
TripUnitTypes.PropertyChanged += (s, e) => Update(e.PropertyName, TripUnitTypes, ShortTimePickups, LoadShortTimePickups);
TripUnitTypes.PropertyChanged += (s, e) => Update(e.PropertyName, TripUnitTypes, ShortTimeDelays, LoadShortTimeDelays);
TripUnitTypes.PropertyChanged += (s, e) => Update(e.PropertyName, TripUnitTypes, Instantaneous, LoadInstantaneous);
//load manufacturers
Manufacturers.SetItems(_dataService.GetManufacturers());
//commands
CanceModalCommand = new DelegateCommand(CancelModal);
NextCommand = new RelayCommand(ClickNext, CanClickNext);
}