public void IncQuantity(decimal quantity)
{
var pitem = new PaidItem {
MenuItemId = MenuItemId, Price = Price
};
NewPaidItems.Add(pitem);
pitem.Quantity += quantity;
FontWeight = FontWeights.Bold;
Refresh();
}
public void PersistPaidItems()
{
foreach (var newPaidItem in NewPaidItems)
{
var item = newPaidItem;
var pitem = PaidItems.SingleOrDefault(
x => x.MenuItemId == item.MenuItemId && x.Price == item.Price);
if (pitem != null)
{
pitem.Quantity += newPaidItem.Quantity;
}
else
{
PaidItems.Add(newPaidItem);
}
}
NewPaidItems.Clear();
FontWeight = FontWeights.Normal;
Refresh();
}
public void CancelPaidItems()
{
NewPaidItems.Clear();
FontWeight = FontWeights.Normal;
Refresh();
}
private decimal GetPaidItemsQuantity()
{
return(PaidItems.Sum(x => x.Quantity) + NewPaidItems.Sum(x => x.Quantity));
}
