public CategoryStatisticListViewModel(IDatabaseProvider <Expense> expenseProvider,
IViewModelFactory viewModelFactory,
ISelectedExpenseManager selectedManager
)
{
this.expenseProvider = expenseProvider;
this.viewModelFactory = viewModelFactory;
this.selectedManager = selectedManager;
LoadFromExpenseProvider();
expenseProvider.DatabaseChanged += (sender, e) =>
{
if (e.ChangedAction == ChangedAction.Add)
{
var expenseViewModel = viewModelFactory.CreateCategoryStatisticViewModel(e.DataItem);
expenseCategoryStatistics.Add(expenseViewModel);
}
else if (e.ChangedAction == ChangedAction.Remove)
{
foreach (ViewModel expenseViewModel in expenseCategoryStatistics)
{
if (((CatagoryStatisticViewModel)expenseViewModel).Name.Equals(e.DataItem.Name))
{
expenseCategoryStatistics.Remove(expenseViewModel);
break;
}
}
}
};
PropertyChanged += (sender, e) =>
{
if (e.PropertyName.Equals(nameof(SelectedCategory)))
{
selectedManager.SelectedExpense = selectedCategory.Expense;
}
};
}