Callbacks.php

1. 8.x drupal/core/modules/system/tests/modules/form_test/lib/Drupal/form_test/Callbacks.php
2. 8.x drupal/core/modules/system/tests/modules/ajax_forms_test/lib/Drupal/ajax_forms_test/Callbacks.php

<?php

/**
 * @file
 * Definition of Drupal\ajax_forms_test\Callbacks.
 */
namespace Drupal\ajax_forms_test;

use Drupal\Core\Ajax\AjaxResponse;
use Drupal\Core\Ajax\DataCommand;
use Drupal\Core\Ajax\HtmlCommand;

/**
 * Simple object for testing methods as Ajax callbacks.
 */
class Callbacks {

  /**
   * Ajax callback triggered by select.
   */
  function selectCallback($form, $form_state) {
    $response = new AjaxResponse();
    $response
      ->addCommand(new HtmlCommand('#ajax_selected_color', $form_state['values']['select']));
    $response
      ->addCommand(new DataCommand('#ajax_selected_color', 'form_state_value_select', $form_state['values']['select']));
    return $response;
  }

  /**
   * Ajax callback triggered by checkbox.
   */
  function checkboxCallback($form, $form_state) {
    $response = new AjaxResponse();
    $response
      ->addCommand(new HtmlCommand('#ajax_checkbox_value', (int) $form_state['values']['checkbox']));
    $response
      ->addCommand(new DataCommand('#ajax_checkbox_value', 'form_state_value_select', (int) $form_state['values']['checkbox']));
    return $response;
  }

}