Order quantity change

[r.steins]

Does anybody now in which php file you can change the quantity up/down counter?

 

Default is +1 / -1

 

I want to change is to +2 / -2 soo only an even quantity can be ordered

 

Thanks!

[NemoPS]

You mean in the product page? Well, you can try using a custom input type="number" and edit line 325 which looks like this

 

  <!-- quantity wanted -->
  <p id="quantity_wanted_p"{if (!$allow_oosp && $product->quantity <= 0) OR $virtual OR !$product->available_for_order OR $PS_CATALOG_MODE} style="display: none;"{/if}>
   <label>{l s='Quantity:'}</label>
   <input type="text" name="qty" id="quantity_wanted" class="text" value="{if isset($quantityBackup)}{$quantityBackup|intval}{else}{if $product->minimal_quantity > 1}{$product->minimal_quantity}{else}1{/if}{/if}" size="2" maxlength="3" {if $product->minimal_quantity > 1}onkeyup="checkMinimalQuantity({$product->minimal_quantity});"{/if} />
  </p>

 

After changing the input to type="number" you can specity the attribute step="2" for it. Note that you'll get incompatibility warnings from a validator if your theme is not html5

[vekia]

i think that the main problem is related to the shopping cart page

in this case you should try to edit the quantity buttons in the shopping-cart-product-line.tpl template file