Add cropping option to an image form

Question

I've the next form.

$form['imagen'] = array(
        '#title' => t('Image'),
        '#type' => 'managed_file',
        '#upload_validators' => array('file_validate_extensions' => array('jpeg jpg png gif')),
        '#upload_location' => 'public://',
        '#progress_indicator' => 'throbber',
        '#status' => FILE_STATUS_PERMANENT,
        '#progress_message' => 'One moment while we save your file...',
    ); 

That generates something like this:

What I need is to give the user the option to see the image that he has upload, and resize the image. The functionality that I need, is the same that the ImageField_crop module gives.

I'm totally lost. I don't know how to add this functionality to the form. It's totally necessary for the project to insert this form in a custom module, because I have a multistep form.

Does anybody know how to do this??

Thank you very much.

Answer 1

Better you can go with implementing the field with "imagefield_crop" module instead of doing customization further.

Answer 2

Is it not possible by adding the #widget attribute to the form? Something like:

    $form['imagen'] = array(
    '#title' => t('Image'),
    '#type' => 'managed_file',
    '#upload_validators' => array('file_validate_extensions' => array('jpeg jpg png gif')),
    '#upload_location' => 'public://',
    '#progress_indicator' => 'throbber',
    '#status' => FILE_STATUS_PERMANENT,
    '#progress_message' => 'One moment while we save your file...',
    '#widget' => array(
     'type' => 'imagefield_crop_widget',
  ),
);