/// <summary>
/// Calculate the change to give
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void OnCalculateChange(object sender, RoutedEventArgs e)
{
if (manager.Hand.TotalValue < total)
{
parent.MessageBox.Text = "Error: Not Enough Money for Transaction";
}
else
{
parent.Transaction.AmountPaid = manager.Hand.TotalValue;
try
{
parent.MessageBox.Text = $"Change To Give:\n{manager.CalculateChange(total)}";
DoneButton.IsEnabled = true;
ChangeButton.IsEnabled = false;
}
catch (InvalidOperationException ex)
{ // Unable to give change
parent.MessageBox.Text = "Error: Unable to give change. Try paying a smaller amount";
}
}
}
