public function submitButton()
    {
        if (self::MODE_VIEW === $this->mode) {
            return '';
        }

        if (!$this->options['enableSubmit']) {
            return '';
        }

        if (self::MODE_EDIT === $this->mode) {
            $text = trans('admin.save');
        } else {
            $text = trans('admin.submit');
        }

        return <<<EOT
<div class="btn-group pull-right">
    <button type="submit" class="btn btn-info pull-right" data-loading-text="<i class='fa fa-spinner fa-spin '></i> $text">$text</button>
</div>
EOT;
    }