/**
* Sets a help text.
*
* @param string $name The field name
* @param string $value The help name (required - the default value is here because PHP do not allow signature changes with inheritance)
*
* @throws InvalidArgumentException when you try to set a help on a none existing widget
*
* @return sfWidget The current widget instance
*/
public function setHelp($name, $value = null)
{
if (2 == func_num_args()) {
if (!isset($this->fields[$name])) {
throw new InvalidArgumentException(sprintf('Unable to set the help on an unexistant widget ("%s").', $name));
}
$this->fields[$name]->setHelp($value);
} else {
// set the help for this widget schema
parent::setHelp($name);
}
return $this;
}
