<?php

/**
 * Implementation of hook_menu().
 */
function tabsexample_menu() {
  $items = array();

  $items['tabsexample'] = array(
    'title' => 'Tabs example, basic',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('tabsexample_form'),
    'access arguments' => array('access content'),
    'type' => MENU_NORMAL_ITEM,
  );

  $items['tabsexample-ajax'] = array(
    'title' => 'Tabs example, AJAX',
    'page callback' => 'tabsexample_ajax_tabset',
    'access arguments' => array('access content'),
    'type' => MENU_NORMAL_ITEM,
  );

  $items['tabsexample/ajax'] = array(
    'title' => 'Tabs example ajax',
    'page callback' => 'tabsexample_ajax',
    'access arguments' => array('access content'),
    'type' => MENU_CALLBACK,
  );

  return $items;
}

/**
 * Generate an example set of tabs.
 */
function tabsexample_form() {
  $form = array();

  $form['example1'] = array(
    '#type' => 'tabset',
  );
  $form['example1']['tab1'] = array(
    // #type and #title are the minimum requirements.
    '#type' => 'tabpage',
    '#title' => t('One'),
    // This will be the content of the tab.
    '#content' => t('First tab content.') . theme('item_list', array(l(t('one'), 'node'), l(t('two'), 'node'), l(t('three'), 'node'))),
  );
  $form['example1']['tab2'] = array(
    '#type' => 'tabpage',
    '#title' => t('Two'),
    '#content' => t('Second tab content.'),
  );
  /*
  // Nest a second tabset.
  $form['example1']['tab2']['tabset2'] = array(
    '#type' => 'tabset',
  );
  $form['example1']['tab2']['tabset2']['tab1'] = array(
    '#type' => 'tabpage',
    '#title' => t('One'),
    '#content' => t('First tab content.'),
  );
  // #content not needed as we are adding child elements.
  $form['example1']['tab2']['tabset2']['tab2'] = array(
    '#type' => 'tabpage',
    '#title' => t('Two'),
  );
  // Place a standard form element (in this case, a textfield) on a tab.
  $form['example1']['tab2']['tabset2']['tab2']['name'] = array(
    '#type' => 'textfield',
    '#title' => t('Name'),
  );
  */
  $form['example1']['tab3'] = array(
    '#type' => 'tabpage',
    '#title' => t('Three'),
    '#content' => t('Third tab content.'),
    // Select this as the active tab at startup.
    '#selected' => TRUE,
  );
  return $form;
}

/**
 * Generate an example set of tabs with one loaded via AJAX.
 *
 * Shows how tabs can be explicitly rendered when not using forms.
 */
function tabsexample_ajax_tabset() {
  $tabset = array();

  $tabset['my_tabset'] = array(
    '#type' => 'tabset',
  );
  $tabset['my_tabset']['first_tab'] = array(
    // #type and #title are the minimum requirements.
    '#type' => 'tabpage',
    '#title' => t('One'),
    // This will be the content of the tab.
    '#content' => t('First tab content.'),
  );
  $tabset['my_tabset']['second_tab'] = array(
    '#type' => 'tabpage',
    '#title' => t('Two'),
    '#content' => t('Second tab content.'),
  );

  $tabset['my_tabset']['second_tab'] = array(
    '#type' => 'tabpage',
    '#title' => t('Two--Ajax loaded'),
    '#content' => t('Not AJAX content.'),
    // The #ajax_url is the url to the content to be loaded.
    // Can be relative or absolute.
    // No content is needed as the content will be dynamically loaded.
    '#ajax_url' => url('tabsexample/ajax'),
  );

  $tabset['my_tabset']['third_tab'] = array(
    '#type' => 'tabpage',
    '#title' => t('Three'),
    // No content, so this tab should not be rendered.
  );
  return $tabset;
}

/**
 * Menu callback: return sample AJAX content.
 */
function tabsexample_ajax() {
  print t('Sample content loaded via AJAX.');
  exit;
}