I need a similar module

[Mantovani Maurizio]

Hello everyone, I 'm looking for a module similar to this but free :
 

http://addons.prestashop.com/en/19487-ilm-quantity-in-dozen.html

Otherwise you can with ( product and cart ) .tpl make a small mod that allows me to be able to use only even numbers in the selection of the amount (2-4-6-8)? 

I have experience in html / css / js and little php.

 

Please Help me.. 

 

[Mantovani Maurizio]

 

I find a quick solution to the product page.  

Thx kingsinnersoul: https://www.prestashop.com/forums/topic/239317-change-quantity-with-buttons/

Add this code on product.tpl after {if !$PS_CATALOG_MODE}{/if}

                            {assign var='categories' value=Product::getProductCategoriesFull($product->id, $cookie->id_lang)}

                            {foreach from=$categories key='categoryId' item='category' name='categories'}

                            {/foreach}


                            {if $categoryId == '33' OR $categoryId == '34' OR $categoryId == '37'}


                            {literal}

	                       <script type="text/javascript">

	                        $(document).ready(function(){


	                         $('#quantity_wanted').val(2);


	                         $('.product_quantity_up').on('click',function(){

	                          if (isNaN(parseInt($('#quantity_wanted').val()))){$('#quantity_wanted').val(1)}

                                  else {

                                      if(parseInt($('#quantity_wanted').val())<=1){$('#quantity_wanted').val(parseInt($('#quantity_wanted').val())+0)}

	                                  else {$('#quantity_wanted').val(parseInt($('#quantity_wanted').val())+1)};

                                  }

	                         });


	                         $('.product_quantity_down').on('click',function(){

	                          if (isNaN(parseInt($('#quantity_wanted').val()))){$('#quantity_wanted').val(1)}

	                          else {  

                                   if(parseInt($('#quantity_wanted').val())<=1){$('#quantity_wanted').val(parseInt($('#quantity_wanted').val())-1)}

                                   else {$('#quantity_wanted').val(parseInt($('#quantity_wanted').val())-1)};

                                    };


	                        });

                            });

	                       </script>

                            {/literal}  


                            {/if}

 

But I miss implement it in the summary of the cart ..

I cant find the file .TPL of summary cart order.. ( Steap - 1 )

 

Help please  

Edited April 2, 2016 by Mantovani Maurizio (see edit history)

[Mantovani Maurizio]

Ok i have find shopping-cart-product-line.tpl 

But my script dont work 

If press + add 2qty in the input but dont save and record only +1qty.. 

 

 

Please i need HELP