/*
 * vim: set ai sw=4 smarttab expandtab: tabstop=8 softtabstop=0
 *
 */

jQuery(document).ready( function($){
  jQuery('.wpdfh_print_checkbox').on("change", function(){
      $.ajax({
        url: wpdfh_ajax_object.ajaxurl, // this is the object instantiated in wp_localize_script function
        type: 'POST',
        data:{ 
            action: 'wpdfh_set_print_metadata', // this is the function in your functions.php that will be triggered
            post_id: $(this).data('post_id'),
            checked: $(this).prop('checked')
        },
        success: function( data ){
            console.log( data );
        }
    });
    })
});