How to prevent uploads for plupload_image field type?

Hi Anh,

I am using Metabox 4.10.1. I defined a field like this:

    array(
        'name'             => esc_html__( 'Image Upload', 'textdomain' ),
        'id'               => 'myprefix_feature1_plupload',
        'type'             => 'plupload_image',
        'desc'  => __( 'Upload a square/circluar image image only!', 'textdomain' ),
	'force_delete'     => true,
        'max_file_uploads' => 2,
	'max_status'       => true,
    ),

I would like to prevent uploading images to this field when they exceed certain sizes. Is that possible? If yes, can you give me some guidance?

I can check the image size with $file['size'] in a 'wp_handle_upload_prefilter' hook. My problem is that stopping the upload with adding $file['error'] does not take effect. It actually causes the GUI to hang.

Thank you.

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FYI, I tried using the 'wp_handle_upload_prefilter' hook in functions.php (see below), but that resulted in the field HTML 'hanging' on the GUI, while Chrome debugger showed repeated calls to /wordpres/wp-admin/admin-ajax.php

function myprefix_limit_file_upload($file) {

// Calculate the image size in KB
$image_size = $file['size']/1024;

// File size limit in KB
$limit = 200;

if ( ( $image_size > $limit ) )
        $file['error'] = 'Your picture is too large. It has to be smaller than '. $limit .'KB';

return $file;

}
add_filter('wp_handle_upload_prefilter', 'myprefix_limit_file_upload');