apigee_m10n-8.x-1.7/modules/apigee_m10n_add_credit/src/Plugin/Field/FieldWidget/PriceRangeDefaultWidget.php

<?php

/*
 * @file
 * Copyright 2018 Google Inc.
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License version 2 as published by the
 * Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
 * License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

namespace Drupal\apigee_m10n_add_credit\Plugin\Field\FieldWidget;

use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Field\WidgetBase;
use Drupal\Core\Form\FormStateInterface;

/**
 * Plugin implementation of the 'price_range_default' widget.
 *
 * @FieldWidget(
 *   id = "price_range_default",
 *   label = @Translation("Price range"),
 *   field_types = {
 *     "apigee_price_range"
 *   }
 * )
 */
class PriceRangeDefaultWidget extends WidgetBase {

  /**
   * {@inheritdoc}
   */
  public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
    $element['#type'] = 'price_range';
    if (!$items[$delta]->isEmpty()) {
      $element['#default_value'] = $items[$delta]->toArray();
    }
    $element['#available_currencies'] = array_filter($this->getFieldSetting('available_currencies'));

    return $element;
  }

}