Contact button conditions

Hi,

Yes. Activate the contact button for all the products in the HikaShop configuration.
Then, you can add the code:

if($this->element->product_quantity !=0) $contact = 0;

$contact = (int)$this->config->get('product_contact', 0);

Hi,

Either you're using another view file than show_default.php, like show_tabular.php or show_reversed.php (or another one you or your template provider created), or you're not editing the file for the correct template, or your product has variants (and in that case, the code would have to be modified to support variants), or you have some caching system on your website and you need to clear the cache to see the change.
To check which view file to edit, you should activate temporarily the "Display view files" setting of the HikaShop configuration.
It will tell you which view files are used on which page of your website, so you'll be able to confirm that it is show_default.php which is used on the product page or another one.
Also, to check that you're in the correct view file for the correct template, you can just add <?php exit; ?> at the top of the view.
If you get a blank page on the frontend for that page after that, then you're editing the correct view file. If not, then either you have some caching or you're editing the wrong file.