how to change a bool value in prestashop 1.6 back end by icon click - prestashop

Question

I want to change my printing status ,I am able to place the icon to change the status but the change is not occurring when I click the Print status icon shown in the image I have placed the callback as changePrintStatus
the code is reaching initProcess() when the change status icon is clicked,But after that what exactly must happen ??Or do i need to call any other function/override function ? (I want to do the same as in customers list where we change active status of customers ,similarly I want to do here for my custom module)
<?php
require_once(_PS_MODULE_DIR_.'eticketprinting/eticketprinting.php');
require_once(_PS_MODULE_DIR_.'eticketprinting/classes/Eticket.php');
class EticketController extends ModuleAdminController
{
public $module;
public $html;
public $tabName = 'renderForm';
public function __construct()
{
$this->tab = 'eticket';
$this->module = new eticketprinting();
$this->addRowAction('edit');
//$this->addRowAction('edit');
// $this->addRowAction('view'); // to display the view
//$this->addRowAction('delete');
$this->explicitSelect = false;
$this->context = Context::getContext();
$this->id_lang = $this->context->language->id;
$this->lang = false;
$this->ajax = 1;
$this->path = _MODULE_DIR_.'eticketprinting';
$this->default_form_language = $this->context->language->id;
$this->table = _DB_KITS_PREFIX_.'print_eticket';
$this->className = 'Eticket';
$this->identifier = 'id_print_eticket';
$this->allow_export = true;
$this->_select = '
id_print_eticket,
ticket_id,
ticket_no,
product_id,
print_status,
date_add,
date_upd
';
$this->name = 'EticketController';
$this->bootstrap = true;
$this->initTabModuleList();
$this->initToolbar();
$this->initPageHeaderToolbar();
// $this->initFieldList();
//$this->initContent();
parent::__construct();
$this->fields_list =
array(
'id_print_eticket' => array(
'title' => $this->l('E-Ticket Print ID'),
'width' => 25,
'type' => 'text',
),
'ticket_id' => array(
'title' => $this->l('Ticket- ID'),
'width' => 140,
'type' => 'text',
),
'ticket_no' => array(
'title' => $this->l('Ticket No'),
'width' => 140,
'type' => 'text',
),
'product_id' => array(
'title' => $this->l('Product ID'),
'width' => 100,
'type' => 'text',
),
'print_status' => array(
'title' => $this->l('Print Status'),
'align' => 'center',
'type' => 'bool',
'callback' => 'changePrintStatus',
'orderby' => false,
),
'date_add' => array(
'title' => $this->l('Date Add'),
'width' => 140,
'type' => 'text',
),
'date_upd' => array(
'title' => $this->l('Date Update'),
'width' => 140,
'type' => 'text',
),
);
}
public function changePrintStatus($value, $eticket)
{
return '<a class="list-action-enable '.($value ? 'action-enabled' : 'action-disabled').'" href="index.php?'.htmlspecialchars('tab=Eticket&id_print_eticket='
.(int)$eticket['id_print_eticket'].'&changePrintVal&token='.Tools::getAdminTokenLite('Eticket')).'">
'.($value ? '<i class="icon-check"></i>' : '<i class="icon-remove"></i>').
'</a>';
}
public function initProcess()
{
parent::initProcess();
//d($this->id_object);
if (Tools::isSubmit('changePrintVal') && $this->id_object) {
if ($this->tabAccess['edit'] === '1') {
//d("reached here");
$this->action = 'change_print_val';
} else {
$this->errors[] = Tools::displayError('You do not have permission to change this.');
}
}
}
public function postProcess()
{
//When generate pdf button is clicked
if (Tools::isSubmit('submitAddeticket')) {
if (!Validate::isDate(Tools::getValue('date_from'))) {
$this->errors[] = $this->l('Invalid "From" date');
}
if (!Validate::isDate(Tools::getValue('date_to'))) {
$this->errors[] = $this->l('Invalid "To" date');
}
if (!Validate::isInt(Tools::getValue('id_product')) || Tools::getValue('id_product')=='' ) {
$this->errors[] = $this->l('Invalid Product/select a product ');
}
if (!count($this->errors)) {
if (count(Ticket::getByProductNDateInterval(Tools::getValue('id_product'),Tools::getValue('date_from'), Tools::getValue('date_to')))) {
//d($this->context->link->getAdminLink('AdminPdf'));
Tools::redirectAdmin($this->context->link->getAdminLink('AdminPdf').'&submitAction=generateEticketPDF&id_product='.urlencode(Tools::getValue('id_product')).'&date_from='.urlencode(Tools::getValue('date_from')).'&date_to='.urlencode(Tools::getValue('date_to')));
}
$this->errors[] = $this->l('No tickets has been found or Ticket Generated Already for this period for Product ID:'.Tools::getValue('id_product').' (Change the Print Status generate the E-Ticket Again)');
}
} else {
parent::postProcess();
}
}
}

Answer 1

I was missing the process function :
**But note that $this->action = 'change_print_val';
and name f the process must be similar in my case processChangePrintVal
So if action is $this->action = 'change_printStatus_val'; then process name must be processChangePrintStatusVal**
I added Below function
/**
* Toggle the Eticket Print Status flag- Here the update action occurs
*/
public function processChangePrintVal()
{
$eticket = new Eticket($this->id_object);
if (!Validate::isLoadedObject($eticket)) {
$this->errors[] = Tools::displayError('An error occurred while updating Eticket Print Status information.');
}
$eticket->print_status = $eticket->print_status ? 0 : 1;
if (!$eticket->update()) {
$this->errors[] = Tools::displayError('An error occurred while Eticket Print Status customer information.');
}
Tools::redirectAdmin(self::$currentIndex.'&token='.$this->token);
}