Contao - limit subcolumn sets for user

subcolumns dca

/* Paste this into your /system/config/dcaconfig.php */
/* Configuration: which types of sets should be in the selectmenu? */
$allowed_gaptypes    =    array( '25x25x25x25','33x33x33','50x50' );

if (is_array($GLOBALS['TL_SUBCL'])) {
	foreach ( $GLOBALS['TL_SUBCL'] as $set_key => $value) 
	{
	
		foreach	( $GLOBALS['TL_SUBCL'][$set_key]['sets'] as $key => $value)
		{
			if ( in_array($key, $allowed_gaptypes) == FALSE ) {
				unset($GLOBALS['TL_SUBCL'][$set_key]['sets'][$key]);
			}
		}
	}	
}

/* Autofill the gap with value 50     */
$GLOBALS['TL_DCA']['tl_content']['fields']['sc_gap']['default']    =    '50';  

Excellent!

$allowed_gaptypes = array( '20x20x20x20x20','25x25x25x25','33x33x33','50x50' );