Thickbox doesn't check if preview exists

Yes, the same behaviour is with Thickbox for Drupal 5. If there is no preview derivative present, thickbox just fades screen and shows loading image. Obviously no image is loaded, because there is no check, if preview derivative is present or not. As you say - it should load another derivative available automatically. Hope this can be solved.

Thanks

I don't use the image module myself so I hope someone will contribute a patch for this.

Since the Thickbox Javascript code is unable to check whether the 'preview' version exists, I solved this issue with the following piece of code in my 'workarounds' module.

function mymodule_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {
  if(!isset($node->images) || !isset($node->images[IMAGE_ORIGINAL]))
    return;
  
  if(!in_array($op, array('update', 'insert', 'delete')))
    return;
    
  $orig_path = $node->images[IMAGE_ORIGINAL];
  foreach($node->images as $key => $path) {
    if($key == IMAGE_ORIGINAL || $path != $orig_path)
      continue;
    
    $path = _image_filename($orig_path, $key);  
    switch($op) {
      case 'update':
      case 'insert':
        @copy($orig_path, $path);
      break;
      case 'delete':
        file_delete(file_create_path($path));
      break;
    }
  }
}

It basically copies the original image for each image that refers to the original. It's probably not the nicest solution, but it solves it for us.

Please check out the Colorbox module and see if it handles this better.

Colorbox will most likely be the recommended upgrade path for Thickbox users.

The Thickbox script is getting a bit old and the Colorbox script is a nice modern replacement.