how to create cart content as pdf output in PRESTASHOP - prestashop

Question

I have to print the cart content in a pdf file and download.
I have try some code using pdfinvoicecontroller.php
I have created new controller - controllers/front/CartprintController.php
class CartprintControllerCore extends FrontController
{
protected $display_header = false;
protected $display_footer = false;
public $content_only = true;
protected $template;
public $filename;
public function postProcess()
{
if (!$this->context->customer->isLogged() && !Tools::getValue('secure_key'))
Tools::redirect('index.php?controller=authentication&back=cartprint');
}
public function display()
{
$displayproducts = $this->context->cart->getProducts();
$pdf = new PDF($displayproducts, PDF::TEMPLATE_INVOICE_CART, $this->context->smarty, $this->context->language->id);
$pdf->render();
}
public function getTemplate()
{
$template = _PS_THEME_PDF_DIR_.'/cartprint.tpl';
return $template;
}
}
Added
const TEMPLATE_INVOICE_CART = 'Cartprint';
line in classes/pdf/PDF.php
3.then created a HTML template file in pdf/cartprint.tpl
<table id="cart_summary" class="std">
<thead>
<tr>
<th class="cart_product first_item">{l s='Product'}</th>
<th class="cart_description item">{l s='Description'}</th>
<th class="cart_unit item">{l s='Unit price'}</th>
<th class="cart_quantity item">{l s='Qty'}</th>
<th class="cart_total item">{l s='Total'}</th>
</tr>
</thead>
{foreach $displayproducts item=prodpef name=prodpef }
<tr>
<td class="cart_product first_item">{$prodpef.name}</td>
<td class="cart_description item">{$prodpef.description_short}</td>
<td class="cart_unit item">{$prodpef.price}</td>>
<td class="cart_quantity item">{$prodpef.cart_quantity}</td>>
<td class="cart_total item">{$prodpef.total}</td>>
</tr>
{/foreach}
</table>
4.in shopping cart page i have created a link
<img src="{$img_dir}icon/pdf.gif" alt="{l s='Invoice'}" class="icon" />
but still i am not getting pdf output .
Any help ?

Answer 1

First it will be better to override PDF class and second you need to create a HTMLTemplateCartPrint.php file in classes dir or override classes dir in order to generate pdf file.
Best regards.