CiviCRM Community Forums (archive)

I'm sure this question is related to the Paypal Standard not working question https://forum.civicrm.org/index.php/topic,34613.msg147033.html#msg147033 posted last month.

I am creating a Payment Processor modeled after PaymentExpress, which is a notify type Payment Processor that uses the doTransferCheckout function call for the payment processor object derived from CRM_Core_Payment.  When I set up an event to use this payment processor, and I have civiCRM 4.5.2 configured without cart support, the event shows a Register button, and the doTransferCheckout function eventually gets called.  If I configure civiCRM to "Use Shopping Cart Style Event Registration" in Administer\CiviEvent\CiviEvent Component Settings, then the event shows an Add to Cart button and I have to add a menu item to add a link to the system to invoke "?page=CiviCRM&q=civicrm/event/view_cart" for the checkout process.  When I try to checkout, the make_payment function in the CRM_Event_Cart_Form_Checkout_Payment object in CRM\Event\Cart\Form\Checkout\Payment.php calls doDirectPayment() for my payment processor, which is a payment function naturally not implemented in a notify type Payment Processor. 

Is there some code I am supposed to write to override make_payment() so it will call doTransferCheckout instead of doDirectPayment?  Is the new Shopping Cart functionality for Events designed to only support form type payment processors and not button or notify type payment processors?