class VerticalTabs

Same name and namespace in other branches
  1. 9 core/lib/Drupal/Core/Render/Element/VerticalTabs.php \Drupal\Core\Render\Element\VerticalTabs
  2. 8.9.x core/lib/Drupal/Core/Render/Element/VerticalTabs.php \Drupal\Core\Render\Element\VerticalTabs
  3. 11.x core/lib/Drupal/Core/Render/Element/VerticalTabs.php \Drupal\Core\Render\Element\VerticalTabs

Provides a render element for vertical tabs in a form.

Formats all child and non-child details elements whose #group is assigned this element's name as vertical tabs.

Properties:

  • #default_tab: The HTML ID of the rendered details element to be used as the default tab. View the source of the rendered page to determine the ID.

Usage example:

$form['information'] = [
  '#type' => 'vertical_tabs',
  '#default_tab' => 'edit-publication',
];
$form['author'] = [
  '#type' => 'details',
  '#title' => $this->t('Author'),
  '#group' => 'information',
];
$form['author']['name'] = [
  '#type' => 'textfield',
  '#title' => $this->t('Name'),
];
$form['publication'] = [
  '#type' => 'details',
  '#title' => $this->t('Publication'),
  '#group' => 'information',
];
$form['publication']['publisher'] = [
  '#type' => 'textfield',
  '#title' => $this->t('Publisher'),
];

Hierarchy

Expanded class hierarchy of VerticalTabs

2 string references to 'VerticalTabs'
ClaroPreRender::trustedCallbacks in core/themes/claro/src/ClaroPreRender.php
Lists the trusted callbacks provided by the implementing class.
claro_element_info_alter in core/themes/claro/claro.theme
Implements hook_element_info_alter().

File

core/lib/Drupal/Core/Render/Element/VerticalTabs.php, line 49

Namespace

Drupal\Core\Render\Element
View on git.drupalcode.org
View source 
class VerticalTabs extends RenderElementBase {
  
  /**
   * {@inheritdoc}
   */
  public function getInfo() {
    $class = static::class;
    return [
      '#default_tab' => '',
      '#process' => [
        [
          $class,
          'processVerticalTabs',
        ],
      ],
      '#pre_render' => [
        [
          $class,
          'preRenderVerticalTabs',
        ],
      ],
      '#theme_wrappers' => [
        'vertical_tabs',
        'form_element',
      ],
    ];
  }
  
  /**
   * Prepares a vertical_tabs element for rendering.
   *
   * @param array $element
   *   An associative array containing the properties and children of the
   *   vertical tabs element.
   *
   * @return array
   *   The modified element.
   */
  public static function preRenderVerticalTabs($element) {
    // Do not render the vertical tabs element if it is empty.
    $group = implode('][', $element['#parents']);
    if (!Element::getVisibleChildren($element['group']['#groups'][$group])) {
      $element['#printed'] = TRUE;
    }
    return $element;
  }
  
  /**
   * Creates a group formatted as vertical tabs.
   *
   * @param array $element
   *   An associative array containing the properties and children of the
   *   details element.
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   The current state of the form.
   * @param array $complete_form
   *   The complete form structure.
   *
   * @return array
   *   The processed element.
   */
  public static function processVerticalTabs(&$element, FormStateInterface $form_state, &$complete_form) {
    if (isset($element['#access']) && !$element['#access']) {
      return $element;
    }
    // Inject a new details as child, so that form_process_details() processes
    // this details element like any other details.
    $element['group'] = [
      '#type' => 'details',
      '#theme_wrappers' => [],
      '#parents' => $element['#parents'],
    ];
    // Add an invisible label for accessibility.
    if (!isset($element['#title'])) {
      $element['#title'] = t('Vertical Tabs');
      $element['#title_display'] = 'invisible';
    }
    $element['#attached']['library'][] = 'core/drupal.vertical-tabs';
    // The JavaScript stores the currently selected tab in this hidden
    // field so that the active tab can be restored the next time the
    // form is rendered, e.g. on preview pages or when form validation
    // fails.
    $name = implode('__', $element['#parents']);
    if ($form_state->hasValue($name . '__active_tab')) {
      $element['#default_tab'] = $form_state->getValue($name . '__active_tab');
    }
    $element[$name . '__active_tab'] = [
      '#type' => 'hidden',
      '#default_value' => $element['#default_tab'],
      '#attributes' => [
        'class' => [
          'vertical-tabs__active-tab',
        ],
      ],
    ];
    // Clean up the active tab value so it's not accidentally stored in
    // settings forms.
    $form_state->addCleanValueKey($name . '__active_tab');
    return $element;
  }

}

Members

Title Modifiers Object type Summary Overriden Title Overrides
PluginInspectionInterface::getPluginDefinition public function Gets the definition of the plugin implementation. 6
PluginInspectionInterface::getPluginId public function Gets the plugin ID of the plugin instance. 2
RenderElementBase::preRenderAjaxForm public static function Adds Ajax information about an element to communicate with JavaScript. 2
RenderElementBase::preRenderGroup public static function Adds members of this group as actual elements for rendering. 2
RenderElementBase::processAjaxForm public static function Form element processing handler for the #ajax form property. 3
RenderElementBase::processGroup public static function Arranges elements into groups. 2
RenderElementBase::setAttributes public static function Sets a form element's class attribute. Overrides ElementInterface::setAttributes 2
VerticalTabs::getInfo public function Returns the element properties for this element. Overrides ElementInterface::getInfo
VerticalTabs::preRenderVerticalTabs public static function Prepares a vertical_tabs element for rendering.
VerticalTabs::processVerticalTabs public static function Creates a group formatted as vertical tabs.

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