/**
* Cancel specific qty of order item
*
* @param Mage_Sales_Model_Order_Item $orderItem
* @param null $qtyToCancel
* @return Mage_Sales_Model_Order_Item
*/
public function cancelOrderItem(Mage_Sales_Model_Order_Item $orderItem, $qtyToCancel = null)
{
if ($orderItem->getStatusId() !== Mage_Sales_Model_Order_Item::STATUS_CANCELED) {
if (is_null($qtyToCancel)) {
$qtyToCancel = $orderItem->getQtyToCancel();
}
Mage::dispatchEvent('sales_order_item_cancel', array('item' => $orderItem));
$orderItem->setQtyCanceled($orderItem->getQtyCanceled() + $qtyToCancel);
$orderItem->setTaxCanceled($orderItem->getTaxCanceled() + $orderItem->getBaseTaxAmount() * $orderItem->getQtyCanceled() / $orderItem->getQtyOrdered());
$orderItem->setHiddenTaxCanceled($orderItem->getHiddenTaxCanceled() + $orderItem->getHiddenTaxAmount() * $orderItem->getQtyCanceled() / $orderItem->getQtyOrdered());
}
return $orderItem;
}
