Add page parent to BS-Isotope shortcode parameters

isotope-page-parent.php

 ob_start();
  extract(shortcode_atts(array(
    'terms_parent'    => '',
    'type' => '',
    'order' => 'date',
    'orderby' => 'date',
    'posts' => -1,
    'tax' => '',
    'terms' => '',
    'post_parent'    => ''
  ), $atts));

  $options = array(
    'order' => $order,
    'orderby' => $orderby,
    'posts_per_page' => $posts,
    'post_type'      => 'post',
  );

// Page Parent
$post_parent= trim($post_parent);
if ($post_parent!= '' ) {
  $options['post_parent'] = $post_parent;
} 

I'm trying to implement your feature but can't get it to work. Can you share the entire template and a sample shortcode?