private void AddReceiptLine(ReceiptLine l)
{
bool AddedYet = false;
Debug.Assert(RefundButton.IsChecked != null);
// If the 'ReceiptLine' already exists on the receipt, increment its 'amount' value.
foreach (ReceiptLine lcur in ReceiptLines)
{
if (lcur.SKU == l.SKU &&
lcur.Barcode == l.Barcode &&
lcur.Description == l.Description &&
lcur.UnitPrice == l.UnitPrice &&
lcur.VAT == l.VAT)
{
if ((bool)RefundButton.IsChecked)
{
lcur.Amount--;
}
else
{
lcur.Amount++;
}
lcur.TotalPrice = lcur.UnitPrice * lcur.Amount;
AddedYet = true;
}
}
// Otherwise, add a new line to the receipt.
if (!AddedYet)
{
if ((bool)RefundButton.IsChecked)
{
l.Amount = -1;
}
else
{
l.Amount = 1;
}
l.TotalPrice = l.UnitPrice * l.Amount;
ReceiptLines.Add(l);
}
ReceiptDataGrid.Items.Refresh();
// Shrink the 'Description' column width to its minimal size,
// providing room for the other columns to grow if needed.
ReceiptDataGrid.Columns[2].Width = DataGridLength.Auto;
ReceiptDataGrid.UpdateLayout();
// Expand the 'Description' column width again to fill any empty space that remains.
ReceiptDataGrid.Columns[2].Width = new DataGridLength(1.0, DataGridLengthUnitType.Star);
ReceiptDataGrid.UpdateLayout();
}
void ClearReceipt()
{
ReceiptLines.Clear();
ReceiptDataGrid.Items.Refresh();
// Shrink the 'Description' column width to its minimal size,
// providing room for the other columns to grow if needed.
ReceiptDataGrid.Columns[2].Width = DataGridLength.Auto;
ReceiptDataGrid.UpdateLayout();
// Expand the 'Description' column width again to fill any empty space that remains.
ReceiptDataGrid.Columns[2].Width = new DataGridLength(1.0, DataGridLengthUnitType.Star);
ReceiptDataGrid.UpdateLayout();
}
