orbit-basic/app/assets/javascripts/page_edit.js.erb

$(document).ready(function(){
	bindTreeDragHandle();
});

var bindTreeDragHandle = function(){
	$('ol.sortable').nestedSortable({
		disableNesting: 'no-nest',
		forcePlaceholderSize: true,
		handle: 'i',
		helper:	'clone',
		items: 'li',
		maxLevels: 3,
		opacity: .5,
		placeholder: 'placeholder',
		revert: 250,
		tabSize: 25,
		tolerance: 'pointer',
		toleranceElement: '> div',

		stop: function(event, ui) {
			$.post("<%= Rails.application.routes.url_helpers.admin_update_position_path %>", { id: ui.item.attr('id'), parent_id: ui.item.parent().closest('li').attr('id'), position: ui.item.index() } );
  	}
	});
}