TreeWidget.php in Term Reference Fancytree 8

Namespace

Drupal\term_reference_fancytree\Plugin\Field\FieldWidget

File

src/Plugin/Field/FieldWidget/TreeWidget.php

<?php

namespace Drupal\term_reference_fancytree\Plugin\Field\FieldWidget;

use Drupal\Core\Field\WidgetBase;
use Drupal\Core\Field\WidgetInterface;
use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\taxonomy\Entity\Vocabulary;

/**
 * A term reference tree widget.
 *
 * @FieldWidget(
 *   id = "term_reference_fancytree",
 *   label = @Translation("Term Reference Fancytree"),
 *   field_types = {"entity_reference"},
 *   multiple_values = TRUE
 * )
 */
class TreeWidget extends WidgetBase implements WidgetInterface {

  /**
   * {@inheritdoc}
   */
  public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {

    // Obtain the target vocabularies from the field settings.
    $handler_settings = $this
      ->getFieldSetting('handler_settings');
    if (isset($handler_settings['target_bundles'])) {
      $vocabularies = Vocabulary::loadMultiple($handler_settings['target_bundles']);
    }
    else {
      $vocabularies = Vocabulary::loadMultiple();
    }

    // Define element settings.
    $element['#type'] = 'term_reference_fancytree';
    $element['#default_value'] = $items
      ->getValue();
    $element['#vocabulary'] = $vocabularies;
    return $element;
  }

}

Classes

Name	Description
TreeWidget	A term reference tree widget.