Hi List

I am trying to learn ajax stuff in Drupal 7.

I want to have a simple questionnaire form. Where I will have a single textfield.

In that text field one will type a question category, and if he wants to type more question categories, user need to click a button "Add More Categories".

Please see link http://www.netcloudsystems.com/?q=questionnaire/form/manage

The whole source code is at the end of this email. When ajax callback fires, I want to remember how many textfields I need to add, so that when a section of form is updated in _form() hook, I can according add those many textfields.

I am trying to manage that using a variable "$all_categories" and form element $form['all_categories'] (of type value).

I tried many options, always I find $all_categories value is 1. So I am unable to add more textfields.

My observation is whatever I set in ajax callback, in _form hook api, I find value is lost.

Kindly guide me what I am missing.

Best Regards

Kamal

NECS, Bangalore

<?php

function questionnaire_menu() {
$items = array();

$items['questionnaire/form/manage'] = array(
'title' => t('Manage questions'),
'page callback' => 'questionnaire_form',
'access arguments' => array('question manage'),
'type' => MENU_SUGGESTED_ITEM,
);

return $items;
}

function questionnaire_permission()
{
return array(
   'question manage' => array(
   'title' => t('Question management'),
   'description' => t('Provides question management capability'),
   ),
);
}

function questionnaire_form()
{
return drupal_get_form('questionnaire_my_form');
}

function questionnaire_my_form($form, &$form_state)
{
$form_state['cache'] = TRUE;

$all_categories = !empty($form_state['values']['all_categories']) ? $form_state['values']['all_categories'] : 1;

$form['all_categories'] = array(
   '#type' => 'value',
   '#default_value' => $all_categories,
   '#value' => $all_categories);

   // The prefix/suffix provide the div that we're replacing, named by
   // #ajax['wrapper'] above.
   $form['category_fieldset'] = array(
        '#title' => t("Questions Categories"),
        '#prefix' => '<div id="category-div">',
        '#suffix' => '</div>',
        '#type' => 'fieldset',
        '#description' => t('Please enter the question categories'),
   );

   for ($i=1; $i<= $all_categories ; $i++)
   {
      $key = 'ctg' . $i;
      $form['category_fieldset']['category'][$key] = array(
         '#type' => 'textfield',
         '#title' => "Question category $i",
         );
    }

   $form['category_fieldset']['add_more_category'] = array(
        '#type' => 'submit',
        '#value' => t('Add More Categories'),
        '#ajax' => array(
          'callback' => 'questionnaire_category_callback',
          'wrapper' => 'category-div',
          'method' => 'replace',
          'effect' => 'fade',
          ),
     );

    $form['submit'] = array(
        '#type' => 'submit',
        '#value' => t('Submit'),
        );

    return $form;
}

function questionnaire_category_callback($form, &$form_state)
{
$form_state['values']['all_categories'] = $form_state['values']['all_categories'] + 1;
return $form['category_fieldset'];
}