vertical_tabs_example.module

<?php

/**
 * @file
 * Shows how to integrate your custom node options with vertical tabs module in
 * Drupal 6. This example does not cover how to save / load custom setting, and
 * only deals with elements visibility.
 */

/**
 * @defgroup vertical_tabs_example Example: Vertical Tabs
 * @ingroup examples
 * @{
 * Using vertical_tabs module. (drupal 6)
 *
 * Shows how to integrate your custom node options with vertical tabs module in
 * Drupal 6. This example does not cover how to save / load custom setting, and
 * only deals with elements visibility.
 *
 * This example is part of the Examples for Developers Project which you can download
 * and experiment with here: http://drupal.org/project/examples
 */

/**
 * Implements hook_menu for a simple explanation page.
 */
function vertical_tabs_example_menu() {
  $items['examples/vertical_tabs'] = array(
    'title' => 'Vertical tabs example',
    'description' => 'Shows how vertical tabs can best be supported by a custom module',
    'page callback' => '_vertical_tabs_example_explanation',
    'access callback' => TRUE,
  );
  return $items;
}

/**
 * Implement hook_form_alter().
 *
 * Adds custom fieldset to the node form, and attach ajax behaviour for vertical
 * panels to update the settings description.
 */
function vertical_tabs_example_form_alter(&$form, $form_state, $form_id) {

  // Only include on node add/edit forms.
  if (isset($form['#node']) && $form['#node']->type . '_node_form' == $form_id) {

    // Define a fieldset for our settings in the node edit form.
    $form['vertical_tabs_example'] = array(
      '#type' => 'fieldset',
      '#title' => t('Example vertical tab'),
      '#collapsible' => TRUE,
      '#collapsed' => FALSE,
      // The #group value must be defined to be included in the vertical tabs
      // element by default.
      '#group' => 'additional_settings',
      // Attach the javascript for vertical tabs. Normally we would use
      // drupal_add_js(), but the vertical tabs module supports this special
      // Drupal 7 #attached property.
      '#attached' => array(
        'js' => array(
          drupal_get_path('module', 'vertical_tabs_example') . '/vertical_tabs_example.js',
        ),
      ),
      '#tree' => TRUE,
      '#weight' => -2,
    );

    // This checkbox is used to show or hide the custom settings form using
    // javascript (altering states of a container defined later).
    $form['vertical_tabs_example']['enabled'] = array(
      '#type' => 'checkbox',
      '#title' => t('Use custom configuration'),
      '#default_value' => FALSE,
    );

    // This container will be used to store the whole form for our custom
    // settings. This way, showing/hidding the form  using javascript is easier,
    // as only one element should be set visible.
    $form['vertical_tabs_example']['vertical_tabs_examplecontainer'] = array(
      '#type' => 'fieldset',
      '#title' => t('Custom setting'),
      // This attribute is required for vertical tabs to track elements beneath
      // it's own tree.
      '#parents' => array(
        'vertical_tabs_example',
      ),
    );

    // The string of this textfield that will be shown as summary in the
    // vertical tab if the checkbox is enabled.
    $form['vertical_tabs_example']['vertical_tabs_examplecontainer']['custom_setting'] = array(
      '#type' => 'textfield',
      '#title' => t('Use this custom setting'),
      '#default_value' => '',
    );
  }
}

/**
 * Simple explanation page.
 */
function _vertical_tabs_example_explanation() {
  return t("The Vertical Tabs Example shows how a custom module can best support vertical tabs. To see the effects of this module, look at the <a href='!node_add'>node/add</a> form", array(
    '!node_add' => url('node/add'),
  ));
}

/**
 * @} End of "defgroup vertical_tabs_example".
 */