GravityView: Do not allow to edit a field if the field has a specific value

gistfile1.php

<?php

/** 
 * Do not allow a certain user to edit a field if that field has a specific value
 * 
 * Replace the following to your own values:
 *  - REPLACE_BY_FORM_ID, use the form id where this logic applies
 *  - REPLACE_BY_FIELD_ID, use the field id where this logic applies
 * 
 * 
 * Add this gist to your theme functions.php
 * 
 */
add_filter( 'gravityview_edit_entry_field_content', 'my_gv_custom_edit_fields', 10, 5 );
function my_gv_custom_edit_fields( $content, $field, $value, $entry_id, $form_id ) {
	if( $form_id != 'REPLACE_BY_FORM_ID' || $field['id'] != 'REPLACE_BY_FIELD_ID' ) {
		return $content;
	}
	// check for the not possible to change value
	if( $value === true ) {
		return '';
	} else {
		return $content;
	}
}

Hi,

if I want to the certain fields not be to editable but can still be visible how can I achieve that, or there is a way to show the single entry table in the edit screen?

thanks for your help