How to add TinyMCE in my HelperForm ?

[kurzic]

Hi all, i'm a newbie in Prestashop, and i'm using the HelperForm. 

I want to add a rich text editor to my textarea. I searched on google and found that (in fr). 

 

But when i add autoload_rte on my field i have that :

 

http://www.noelshack.com/2016-22-1464766939-capture-du-2016-06-01-09-41-01.png

 

So all my fields are in tinyMCE and i want just my last field... Behind my code :

	private function createNewAdminForm() {

		$this->fields_form[] = array(
		    'form' => array(
    			'legend' => array('title' => $this->l('ax_banniere')),
    			'input' => array(
    				array(
    					'type' => 'text',
    					'name' => 'title',
    					'label' => 'Titre',
    					'required' => true
    				),
    				array(
    					'type' => 'text',
    					'name' => 'date_debut_publication',
    					'label' => 'Date de début de publication',
    					'required' => true
    				),
    				array(
    					'type' => 'text',
    					'name' => 'date_fin_publication',
    					'label' => 'Date de fin de publication',
    					'required' => true
    				),
    				array(
    					'type' => 'textarea',
    					'name' => 'content',
    					'label' => 'Contenu',
    					'rows' => 5,
    					'cols' => 20,
    					'lang' => false,
    					'required' => true,
    					'autoload_rte' => true,
    					'hint' => 'Invalid characters: <>;=#{}'
    				),
    			),
    			'submit' => array(
    				'title' => 'sauvegarder', // This is the button that saves the whole fieldset.
    				'class' => 'button',
    				'name' => 'submitax_banniere'
    			)
    		)
        );

		$helper = new HelperForm();

		$helper->module = $this;
		$helper->name_controller = $this->name;
		$helper->token = Tools::getAdminTokenLite('AdminModules');
		$helper->currentIndex = AdminController::$currentIndex . '&configure=' . $this->name;
		$helper->identifier = $this->identifier;
		$helper->title = 'Ax_banniere_custom';
		$helper->show_toolbar = false;
		$helper->toolbar_btn = $this->_initToolbar(true);

		$helper->submit_action = 'submitax_banniere';

		$c = new Customban();
		$helper -> fields_value = array('title' => '', 'date_debut_publication' => '', 'date_fin_publication' => '', 'content'=> '');

		return $helper->generateForm($this->fields_form);

Note : i'm using Prestashop 1.5, if someone have got any answer it can be great. And sorry for my bad english

 

Thanks