If a control wants to respond to callback event, it must implement this
interface.
/**
* Returns javascript statement that create a new callback request object.
* @param ICallbackEventHandler callback response handler
* @param array additional callback options
* @return string javascript statement that creates a new callback request.
*/
public function getCallbackReference(ICallbackEventHandler $callbackHandler, $options = null)
{
$options = !is_array($options) ? array() : $options;
$class = new \ReflectionClass($callbackHandler);
$clientSide = $callbackHandler->getActiveControl()->getClientSide();
$options = array_merge($options, $clientSide->getOptions()->toArray());
$optionString = TJavaScript::encode($options);
$this->registerPradoScriptInternal('ajax');
$id = $callbackHandler->getUniqueID();
return "new Prado.CallbackRequest('{$id}',{$optionString})";
}
