JqueryUIMultiSelectWidget.php in jQuery UI MultiSelect Widget 8

Contains \Drupal\jquery_ui_multiselect_widget\Plugin\Field\FieldWidget\JqueryUIMultiSelectWidget.

Namespace

Drupal\jquery_ui_multiselect_widget\Plugin\Field\FieldWidget

File

src/Plugin/Field/FieldWidget/JqueryUIMultiSelectWidget.php

<?php

/**
 * @file
 * Contains \Drupal\jquery_ui_multiselect_widget\Plugin\Field\FieldWidget\JqueryUIMultiSelectWidget.
 */
namespace Drupal\jquery_ui_multiselect_widget\Plugin\Field\FieldWidget;

use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Field\Plugin\Field\FieldWidget\OptionsSelectWidget;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Field\FieldDefinitionInterface;

/**
 * Plugin implementation of the 'boolean_checkbox' widget.
 *
 * @FieldWidget(
 *   id = "jquery_ui_multiselect_widget",
 *   label = @Translation("Jquery UI Multi Select"),
 *   field_types = {
 *     "entity_reference",
 *     "list_integer",
 *     "list_float",
 *     "list_string"
 *   },
 *   multiple_values = TRUE
 * )
 */
class JqueryUIMultiSelectWidget extends OptionsSelectWidget {

  /**
   * {@inheritdoc}
   */
  public static function defaultSettings() {
    return array(
      'jquery_ui_multiselect_widget_show_header' => FALSE,
      'jquery_ui_multiselect_widget_show_filter' => FALSE,
      'jquery_ui_multiselect_widget_filter_placeholder' => '',
    ) + parent::defaultSettings();
  }

  /**
   * {@inheritdoc}
   */
  public function settingsForm(array $element, FormStateInterface $form_state) {
    $field_name = $this->fieldDefinition
      ->getName();
    $element['jquery_ui_multiselect_widget_show_header'] = array(
      '#type' => 'checkbox',
      '#title' => $this
        ->t('Show header'),
      '#default_value' => $this
        ->getSetting('jquery_ui_multiselect_widget_show_header'),
    );
    $element['jquery_ui_multiselect_widget_show_filter'] = array(
      '#type' => 'checkbox',
      '#title' => $this
        ->t('Show filter'),
      '#default_value' => $this
        ->getSetting('jquery_ui_multiselect_widget_show_filter'),
    );
    $element['jquery_ui_multiselect_widget_filter_placeholder'] = array(
      '#type' => 'textfield',
      '#title' => $this
        ->t('Filter placeholder text'),
      '#default_value' => $this
        ->getSetting('jquery_ui_multiselect_widget_filter_placeholder'),
      '#states' => [
        'visible' => array(
          ':input[name="fields[' . $field_name . '][settings_edit_form][settings][jquery_ui_multiselect_widget_show_filter]"]' => array(
            'checked' => TRUE,
          ),
        ),
      ],
    );
    return $element;
  }

  /**
   * {@inheritdoc}
   */
  public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
    $element['#attached'] = [
      'library' => [
        'jquery_ui_multiselect_widget/jquery_ui_multiselect_widget.js',
        'jquery_ui_multiselect_widget/jquery_ui_multiselect_widget.css',
      ],
      'drupalSettings' => [
        'jquery_ui_multiselect_widget' => [
          $items
            ->getName() => [
            'header' => $this
              ->getSetting('jquery_ui_multiselect_widget_show_header'),
            'filter' => $this
              ->getSetting('jquery_ui_multiselect_widget_show_filter'),
            'filter_placeholder' => $this
              ->getSetting('jquery_ui_multiselect_widget_filter_placeholder'),
            'cardinality' => $this->fieldDefinition
              ->getFieldStorageDefinition()
              ->getCardinality(),
          ],
        ],
      ],
    ];
    return parent::formElement($items, $delta, $element, $form, $form_state);
  }

  /**
   * {@inheritdoc}
   */
  public static function isApplicable(FieldDefinitionInterface $field_definition) {

    // Applicable only for items having cardinality more than 1.
    return $field_definition
      ->getFieldStorageDefinition()
      ->isMultiple();
  }

}

Classes

Name	Description
JqueryUIMultiSelectWidget	Plugin implementation of the 'boolean_checkbox' widget.