/// <summary>
/// event handler to process when payment is cash
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
public void OnPaymentByCash(object sender, RoutedEventArgs e)
{
payment = "Pay by Cash";
var cashDrawer = new CashRegister.CashDrawer();
var mainWindow = this.FindAncestor <MainWindow>();
var screen = new CashRegisterDrawer();
mainWindow.SwapScreen(screen);
}
void onPayWithCashButtonClicked(object sender, RoutedEventArgs e)
{
var cashDrawer = new CashRegister.CashDrawer();
}