public function validate()
    {
        // Delete the file when requested
        if (true === $this->enableReset && $this->getPost($this->strName.'_reset')) {
            if (null !== ($fileModel = FilesModel::findByPk($this->varValue))) {
                $file = new File($fileModel->path);
                $file->delete();
            }

            unset($_FILES[$this->strName]);

            return;
        }

        // Handle file upload
        parent::validate();

        // Set the image as varValue
        $file = $_SESSION['FILES'][$this->strName];
        if (true === $file['uploaded']) {
            $this->varValue = StringUtil::uuidToBin($file['uuid']);
        } else {
            $this->blnSubmitInput = false;
        }
    }