/**
* Start listening for key presses
*
* @param string|null $promptType
* @return boolean
*/
protected function _listenForKeyPresses($promptType = null)
{
$this->_dtmfHandler->reset();
$this->_dtmfHandler->setContextParams(array('promptType' => $promptType));
$this->_dtmfHandler->addEventListener(Streamwide_Engine_Events_Event::KEY, array('callback' => array($this, 'onKeyPressed')));
$listening = $this->_dtmfHandler->startListening();
if (!$listening) {
$this->_dtmfHandler->flushEventListeners();
}
return $listening;
}
