public static function EntityqueueDragtableWidget::addItemAjax in Entityqueue 8

Ajax callback for the "Add item" button.

File

src/Plugin/Field/FieldWidget/EntityqueueDragtableWidget.php, line 332

Class

EntityqueueDragtableWidget

Plugin implementation of the 'entityqueue_dragtable' widget.

Namespace

Drupal\entityqueue\Plugin\Field\FieldWidget

Code

public static function addItemAjax(array $form, FormStateInterface $form_state) {
  $button = $form_state
    ->getTriggeringElement();

  // Go two levels up in the form, to the widgets container.
  $element = NestedArray::getValue($form, array_slice($button['#array_parents'], 0, -2));

  // Remove the submitted value from the 'Add item' textfield.
  $element['add_more']['new_item']['target_id']['#value'] = NULL;

  // Add a DIV around the delta receiving the Ajax effect.
  $delta = $element['#max_delta'];
  $element[$delta]['#prefix'] = '<div class="ajax-new-content">' . (isset($element[$delta]['#prefix']) ? $element[$delta]['#prefix'] : '');
  $element[$delta]['#suffix'] = (isset($element[$delta]['#suffix']) ? $element[$delta]['#suffix'] : '') . '</div>';
  return $element;
}