protected function __build($version = VERSION, XMLElement $extra = null)
 {
     parent::__build();
     $this->Form = Widget::Form(INSTALL_URL . '/index.php', 'post');
     $title = new XMLElement('h1', $this->_page_title);
     $version = new XMLElement('em', __('Version %s', array($version)));
     $title->appendChild($version);
     if (!is_null($extra)) {
         $title->appendChild($extra);
     }
     $this->Form->appendChild($title);
     if (isset($this->_params['show-languages']) && $this->_params['show-languages']) {
         $languages = new XMLElement('ul');
         foreach (Lang::getAvailableLanguages(false) as $code => $lang) {
             $languages->appendChild(new XMLElement('li', Widget::Anchor($lang, '?lang=' . $code), $_REQUEST['lang'] == $code || $_REQUEST['lang'] == null && $code == 'en' ? array('class' => 'selected') : array()));
         }
         $languages->appendChild(new XMLElement('li', Widget::Anchor(__('Symphony is also available in other languages'), 'http://getsymphony.com/download/extensions/translations/'), array('class' => 'more')));
         $this->Form->appendChild($languages);
     }
     $this->Body->appendChild($this->Form);
     $function = 'view' . str_replace('-', '', ucfirst($this->_template));
     $this->{$function}();
 }