public static function CheckboxTree::valueCallback in Taxonomy Term Reference Tree Widget 8

Determines how user input is mapped to an element's #value property.

Parameters

array $element: An associative array containing the properties of the element.

mixed $input: The incoming input to populate the form element. If this is FALSE, the element's default value should be returned.

\Drupal\Core\Form\FormStateInterface $form_state: The current state of the form.

Return value

mixed The value to assign to the element.

Overrides FormElement::valueCallback

File

src/Element/CheckboxTree.php, line 88

Class

CheckboxTree

Provides a form element for term reference tree.

Namespace

Drupal\term_reference_tree\Element

Code

public static function valueCallback(&$element, $input, FormStateInterface $form_state) {
  $value = [];
  $element += [
    '#default_value' => [],
  ];
  foreach ($element['#default_value'] as $key) {
    if (isset($key['target_id'])) {
      $value[$key['target_id']] = $key['target_id'];
    }
  }
  return $value;
}