Two AHAH issues... request expert assistance...

Two AHAH issues... request expert assistance...

- I have a hobby Drupal website which maintains lists of authors and retrieves their publications from Amazon (www.authorcollector.com).
- There is a "Publications" page with two important blocks... a "Main" block which displays a table of publications... and a "Filter" block which allows users to filter what is displayed in the Main table.
- So one block, Filter, controls what is shown in another block, Main.

This all worked great before added AHAH to the Filter block... to remove the need for the user to hit an "Apply Filter" (submit) button (still does, for folks with JS disabled).

I added AHAH to all form objects... and with a lot of reading and some custom magic... it "mostly" works.

I have two issues:

1) "Filter form" text fields and "Enter"
If the user changes a text field and hits "Enter", this is taken to be as if the default button on the page was pressed... resulting in an "An HTTP error 0 occurred" alert (and the main table does not update properly). I've thoroughly read posts on forms and handling "Enter" and even incorporated code borrowed from the very nice AHAH_Helper module... all to no avail (note that I can't really use AHAH_Helper out-of-the-box as it was designed for forms which use AHAH to self-modify... I'm using a form's contents to modify the display of another block).

2) JS stops working in "Main" display
In the Main page, I use the Cluetip module to display rich popup messages to the user when they hover over a book title. Works great, until I update the page contents using AHAH... the I see the non-Cluetip enabled tooltip (which is ugly). I look at the page source... all necessary JS includes are present... just it seems JS (or perhaps jQuery) just stops working. I've tried pasting the "jq_add" and "drupal_add_js" commands within the Filter form to see if this helped... nope. Also, once the tooltips stop displaying, all I need do to fix it is hit the "Apply Filter" button (submit) and all is fixed.

Thanks in advance,

Mark

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Undoubtedly someone will ask me to post code next... so I'll do it now...

In my main module...

  // Publications section  
  $items['publications'] = array(
    'title' => 'Publications',
    'page callback' => 'publications_pager',
    'access arguments' => array('any user'),
    'description' => t('Paged publications table.'),
    'type' => MENU_NORMAL_ITEM,
    'file' => 'publications.pages.inc',
  );
  $items['publications/js'] = array(
    'title' => 'Publications (JSON)',
    'page callback' => 'publications_pager_js',
    'access arguments' => array('any user'),
    'description' => t('Paged publications table (JSON).'),
    'type' => MENU_CALLBACK,
    'file' => 'publications.pages.inc',
  );

In publications.pages.inc... example of form declaration of text field...

  $form['language'] = array(
    '#type' => 'textfield',
    '#title' => t('Language'),
    '#description' => 'Leave blank for all languages.',
    '#default_value' => get_user_preferences('language'),
    '#ahah' => array(
      'event' => 'change',
      'method' => 'replace',
      'path' => 'publications/js',
      'wrapper' => 'publications-table',
      'progress' => array('type' => 'throbber'),
    ),
  );

In publications.pages.inc... code to handle the AHAH...

// Process Filter form AHAH request, rebuild Publications table, return JSON object
function publications_pager_js() {
  // The following code was found in post "Doing AHAH Correctly in Drupal 6 and beyond"
  $form_state = array('storage' => NULL, 'submitted' => FALSE);
  $form_build_id = $_POST['form_build_id'];
  $form = form_get_cache($form_build_id, $form_state);
  $args = $form['#parameters'];
  $form_id = array_shift($args);
  $form_state['post'] = $form['#post'] = $_POST;
  $form['#programmed'] = $form['#redirect'] = FALSE;
  
  // The following was borrowed from AHAH_Helper to deal with the "Enter" issue
  // So far this code doesn't help... "Enter" not handled, nor does AHAH even seem to work
  if (true) {
    $form_state['submitted'] = TRUE;
    if (!isset($_POST['op'])) {
      // For the default "{$form_id}_validate" and "{$form_id}_submit" handlers.
      $form['#validate'] = NULL;
      $form['#submit'] = NULL;
      // For custom set #validate and #submit handlers
      $form_state['submit_handlers'] = NULL;
      $form_state['validate_handlers'] = NULL;
      _ahah_helper_disable_validation($form); 
    }
  }
  // Process and rebuild form
  drupal_process_form($form_id, $form, $form_state);
  $form = drupal_rebuild_form($form_id, $form_state, $args, $form_build_id);  
  
  // Set user filter preferences based on the current state of this form
  set_user_preferences(array('authorname' => trim(check_plain($form_state['values']['authorname'])), 
                             'language' => trim(check_plain($form_state['values']['language'])), 
                             'pubdate' => trim(check_plain($form_state['values']['pubdate'])),
                             'binding' => trim(check_plain($form_state['values']['binding'])),                                
                             'pricing' => trim(check_plain($form_state['values']['pricing'])))
                       );  

  // Cache GET and REQUEST so the 'table' and 'pager' themes called by publications_pager_inner() have proper context  
  $save_GET = $_GET; $save_REQUEST = $_REQUEST;
  // Unset/change some values in GET/REQUEST so the 'table' and 'pager' themes called by publications_pager_inner() have proper context    
  $names = array('authorname', 'language', 'binding', 'pricing', 'pubdate', 'form_build_id', 'form_id', 'form_token');
  foreach($names as $name) {
    unset($_REQUEST[$name]);
  }
  $_GET['q'] = 'publications';

  // Fetch the "inner" part of the publications page to display in the 'publications-table' DIV                    
  $output = publications_pager_inner();

  // Restore GET and REQUEST   
  $_GET = $save_GET; $_REQUEST = $save_REQUEST;
  
  // Return the publications table to be inserted into the 'publications-table' DIV
  return drupal_json(array('status' => TRUE, 'data' => $output));
}

// Borrowed from AHAH_Helper
function _ahah_helper_disable_validation(&$form) {
  foreach (element_children($form) as $child) {
    $form[$child]['#validated'] = TRUE;
    _ahah_helper_disable_validation(&$form[$child]);
  }
}