public function createChildControls()
{
$o = new TTextBox();
$o->setId($this->genFilterId());
$this->_control = $o;
$this->createLabel($o->getId());
$this->getControls()->add($o);
if ($this->_vali) {
$this->_vali->setControlToValidate($o->getId());
$this->getControls()->add($this->_vali);
}
}