Add TinyMCE field to prestashop

If you look to add a tinyMCE form field to prestashop module, or to an existant page in Back end or Front end.
PS: i suppose that you are using the helperForm to create your form
You should add  'tinymce' => true, and 'autoload_rte' => true, to the form array,
in this example, i'm using a textarea for the tinyMCE field.

 $fields_form[0]['form'] = array(
                   'tinymce' => true,
                   'legend' => array(
                                     'title' => $this->l('Ajout de règle'),
                                   ),
                                 'input' => array(
    
              
                   array(
                       'type' => 'textarea',
                        'label' => $this->l('Texte du Champ'),
                                                    'name' => 'text',
                        'cols' => 40,
                        'rows' => 10,
                        'class' => 'rte',
                        'autoload_rte' => true,
                   )
                                    )
                          ); 

Nothing special to use it in the controller:

Tools::getValue('text');

text is the field name.

In your class you should declare a html type field like this

'text' => array(
  'type' => ObjectModel :: TYPE_HTML, 'validate' => 'isString'
     ),

Hope i was so clear.