public BillsWindowViewModel(SummaryDatabase database,
IRuleProvider ruleProvider,
IViewModelFactory viewModelFactory) :
base(ruleProvider)
{
this.viewModelFactory = viewModelFactory;
billProvider = database.BillProvider;
billListViewModel = viewModelFactory.CreateBillListViewModel();
categoryStatisticListViewModel = viewModelFactory.CreateCategoryStatisticListViewModel();
addBillCommand = new DelegateCommand(AddBill, () => CanAdd);
foreach (Account account in database.AccountProvider.Items)
{
accountIcons.Add(account);
}
foreach (Expense expense in database.ExpenseProvider.Items)
{
expenseIcons.Add(expense);
}
database.AccountProvider.DatabaseChanged += (sender, e) =>
{
if (e.ChangedAction == ChangedAction.Add)
{
accountIcons.Add(e.DataItem);
}
else if (e.ChangedAction == ChangedAction.Remove)
{
accountIcons.Remove(e.DataItem);
if (accountIcons.Count == 0)
{
SelectedAccount = null;
}
}
else
{
if (HasErrors)
{
OnPropertyChanged(new PropertyChangedEventArgs(nameof(Sum)));
}
}
};
database.ExpenseProvider.DatabaseChanged += (sender, e) =>
{
if (e.ChangedAction == ChangedAction.Add)
{
expenseIcons.Add(e.DataItem);
}
else if (e.ChangedAction == ChangedAction.Remove)
{
expenseIcons.Remove(e.DataItem);
if (expenseIcons.Count == 0)
{
SelectedExpense = null;
}
}
};
}
