/**
  * Fill table row
  */
 protected function fillRow($a_set)
 {
     global $lng;
     $this->tpl->setVariable("FILENAME", $a_set["filename"]);
     $piname = pathinfo($a_set["filename"]);
     $th_path = ilObjMediaObject::getThumbnailPath($this->mob->getId(), basename($a_set["filename"], "." . $piname['extension']) . ".png");
     if (!is_file($th_path)) {
         $this->mob->makeThumbnail("overlays/" . $a_set["filename"], basename($a_set["filename"], "." . $piname['extension']) . ".png");
     }
     if (is_file($th_path)) {
         $this->tpl->setVariable("THUMB", ilUtil::img($th_path));
     }
 }