Custom Subject in Confirmation email

-- HikaShop version -- : 2.6.0
-- Joomla version -- : 3.4.6
-- PHP version -- : 5.4.38

Hi,
I set up the confirmation email so that only some information show when the order_status is "confirmed" and when the order_status is "shipped".
Now what i would like to do is depending on the order_status change the subject line.
I have looked in the language file, but the status is %s.
So what i tried to do in the pre-load of the confirmation email is the following:

if($data->order_status=='confirmed') {
	$data->$mail->subject = 'Custom text for order confirmation;
} elseif($data->order_status=='shipped') {
	 $data->$mail->subject = 'Custom text for shipped order';
 }

I tried it like you said. It didnt work. It still pulls the text from the language file (ORDER_STATUS_NOTIFICATION_SUBJECT)

I just did the line $data->mail->subject = 'Custom text for order confirmation;
without the if statement, but that doesnt matter either. Also first i had it at the bottom in the preload, then moved it to the top. But that doesnt matter either.

I resolved the issue.

@rkuiper could you show how you were able to resolve this? I am too trying to have a custom subject in the order emails, in my scenario I'm checking against the payment method used. I also have not been able to get the subject to display other the the default "ORDER_CREATION_NOTIFICATION_SUBJECT"

I'm running Hikashop version 3.0 Business edition.

Any help on this would be great! Thanks!

The way i solved it is with the following code:

<?php
if($data->order_status=='confirmed') 
	{$mail->subject = 'Custom Subject #1';} 
elseif($data->order_status=='processing') 
	{$mail->subject = 'Custom Subject #2';}
elseif($data->order_status=='packing') 
	{$mail->subject = 'Custom Subject #3';}
 ?>