public ProductViewModel(Product product) : base(product)
{
if (product.Group != null)
{
Group = new ProductGroupViewModel(product.Group);
Group.Model.ModelChanged += OnModelChanged;
}
}
public override void LoadItems(ObservableCollection <DataModel> source)
{
base.LoadItems(source);
ProductGroupViewModel allGroup = NewItem(ProductGroup.All) as ProductGroupViewModel;
Items.Insert(0, allGroup);
SelectedItem = allGroup;
View = (CollectionView)CollectionViewSource.GetDefaultView(Items);
}
public override void OnModelChanged(object sender, DataAccess.ModelChangedEventArgs e)
{
if (Group != null && sender.Equals(Group.Model) && e.Type == DataAccess.ModelChangedEventArgs.EventType.Delete)
{
Group = null;
}
else if (e.Type == DataAccess.ModelChangedEventArgs.EventType.Update && e.Properties.Contains("Group"))
{
if ((sender as Product).Group == null)
{
Group = null;
}
else
{
Group = new ProductGroupViewModel(Model.Group);
}
}
else if (e.Type == DataAccess.ModelChangedEventArgs.EventType.Update && (e.Properties.Contains("Price") || e.Properties.Contains("Tax")))
{
RaisePropertyChanged("TaxlessPrice");
RaisePropertyChanged("TotalPrice");
}
base.OnModelChanged(sender, e);
}
public override DataViewModel NewItem(DataModel model)
{
ProductGroupViewModel viewmodel = new ProductGroupViewModel(model as ProductGroup);
return(viewmodel);
}