Implement a value_callback for media element

Subscribing.

/**
 * Implements hook_element_info().
 */
function media_element_info() {
  $types = array();
  $types['media'] = array(
    '#input' => TRUE,
    '#process' => array('media_element_process'),
    //'#value_callback' => 'media_element_value',
    '#element_validate' => array('media_element_validate'),
    '#theme_wrappers' => array('container'),
    '#progress_indicator' => 'throbber',
    '#extended' => FALSE,
    '#required' => FALSE,
    '#media_options' => array(
      'global' => array(
        'types' => array(), // Example: array('image', 'audio');
        'schemes' => array(), // Example: array('http', 'ftp', 'flickr');
      ),
    ),
    '#attributes' => array(
      'class' => array('media-widget'),
    ),
    '#attached' => array(
      'library' => array(
        array('media', 'media_browser'),
        ),
    ),
  );
  return $types;
}

If you check value_callback is commented..we need this one for this to work...something like
http://api.drupal.org/api/drupal/modules%21file%21file.module/function/f...

Any news on this?

Media module is quite awesome, but this is limiting the module integration with other forms not using entity fields.

:(

Ok, on more reason to get this fixed:
#1776300: Respect field settings like minimum - maximum size when used as image field

@ParisLiakos -
Just an fyi... when using the media_multiselect module + plupload + media-2.x-dev and file_entity-2.x-dev, I currently can't seem to specify a "File directory" on image fields. If I do specify a directory, ex. "galleries" then only the first image is uploaded on a multivalued(unlimited) image field and I don't believe the image is uploaded correctly. If you look under admin/content/file the files is missing a name. I believe this problem is only with image fields.

To fix the problem - you can manually create a directory called "galleries", then everything will work correctly UNLESS you are using Tokens in the "File directory" field. Ex. galleries/[current-date:custom:M-Y] is what I use. The problem is that the directories don't get created, so the files can't be moved into the correct directory.

The way I have to work around this is by using the patch for plupload http://drupal.org/node/1946298#comment-7192092, but that is closed(won't fix).

This issue is spread out in different modules and is a little hard to track down.
#1733472: Problem with subdirectory for upload images
#1776300: Respect field settings like minimum - maximum size when used as image field
#1946298: upload_location directory not being created if it doesn't exist
I think I have seen some other similar issues in the plupload and media_multiselect issue queues related to this problem.

I actually get it working by the following way.

1) to make sure you can find the form id after submission. You can use "#tree" on this media selector element. This way the submission fid will be wrapped inside an array.

2) to make sure you can grab the fid after the submission, especially if you have multiple media selector on the form, you need to use $form_state['input'][form_element_id_you_use]['fid'] instead of $form_state['values']['fid'] which sometimes doesn't get populated at all when you have multiple selectors.

Yes, media selector has various issues, ex. it doesn't use 'default_value' (instead 'value' is used). But overall it's pretty solid, just needs some improvement.

This should now be fixed with #2187837: Bring media element and field widget inline with managed_file equivalents.