Integrate Filefield Sources with Imagefield Crop

I implemented the hook to use Filefield Sources with Imagefield Crop (current dev)

function mymodule_filefield_sources_widgets() {
  return array('imagefield_crop_widget');
}

This works fine, but the JavaScript is broken. Clicking on a link above the field does not change the original widget. In Chrome debugger i drilled down to the problem:

$fileFieldElement = $(this).parents('div.form-managed-file:first');

This does not match for Imagefield crop here the

<div class="imagefield-crop-widget form-managed-file clearfix"></div>

is empty.

I changed the JavaScript to

$fileFieldElement = $(this).parents('div.form-type-managed-file:first');

And now it works, but have some more problems with image crop....