谷歌地图方向mvcobject获得一个单独的步骤

Question

我正在使用directionsService通过google地图javascript api获取路线。问题是我想获得单独的步骤，但让它们成为mvc对象的一部分，所以当你点击它们时，它们会在地图上呈现为默认值

directionsDisplay.setDirections(response); 

一样。 一些代码：

var directionsService = new google.maps.DirectionsService();
directionsDisplay.setMap(map);

var request = {
        origin : a,
        destination : b,
        travelMode : google.maps.DirectionsTravelMode.DRIVING
};

directionsService.route(request, function(response, status) {

    if (status == google.maps.DirectionsStatus.OK) {
                directionsDisplay.setDirections(response);
          //Instead of setting directions to a panel i want to 
          //set just one to a panel and yet have it link to the
          //map like the above does.
            }});