/**
* Add a child component
*
* @param WP_Form_Component $element
* @param string $key A unique key for the component.
* Any existing component with the same key
* will be overwritten. If $key is empty,
* an attempt will be made to generate a
* unique key.
* @throws InvalidArgumentException
* @return $this
*/
public function add_element(WP_Form_Component $element, $key = '')
{
if (empty($key)) {
$key = $element->get_name();
}
if (empty($key)) {
throw new InvalidArgumentException(__('Cannot add nameless element to a fieldset', 'wp-forms'));
}
$this->elements[$key] = $element;
return $this;
}
protected function prepare_form_values(WP_Form_Component $component)
{
if ($component instanceof WP_Form_Aggregate) {
foreach ($component->get_children() as $child) {
$this->prepare_form_values($child);
}
} elseif ($component instanceof WP_Form_Element) {
$value = $this->get_value($component->get_name());
$component->set_value($value);
}
}
