google-maps-api-3 - 拖动标记时更改方向渲染的位置

Question

我有一个根据标记位置在数据库中保存航路点的项目，我想在这个标记上使用自定义图标，所以我抑制了路线标记(绿色标记)

但是如果我将标记移动到另一个点，它不会根据标记位置更改渲染线，我想在更改标记位置时“更新”此渲染器。

This is the link to my project with the original version这是我的代码:(用我的尝试编辑)

var map, ren, ser;
var data = {};
var data2 = {};
var marker;
var infowindow;
var directionsDisplay;

var wayA = [];
var wayB = [];
var directionResult = [];

function goma()
{
    var mapDiv = document.getElementById('mappy');   
    var mapOptions = {
    zoom: 12,       
    center: new google.maps.LatLng(-23.563594, -46.654239),
    mapTypeId : google.maps.MapTypeId.ROADMAP
    }
    map = new google.maps.Map( mapDiv, mapOptions );

    google.maps.event.addListener(map, "click", function(event) {
        if (wayA.length == wayB.length) {
        wayA.push(new google.maps.Marker({
      draggable: true,      
          position: event.latLng,
          map: map        
        }));
        } else {
        wayB.push(new google.maps.Marker({
      draggable: true,  
          position: event.latLng,
          map: map  
        }));  

ren = new google.maps.DirectionsRenderer( {'draggable':true, suppressMarkers : true}  );
    ren.setMap(map);
    ren.setPanel(document.getElementById("directionsPanel"));
    ser = new google.maps.DirectionsService();

    ser.route({ 'origin': wayA[wayA.length-1].getPosition(), 'destination':  wayB[wayB.length-1].getPosition(), 'travelMode': google.maps.DirectionsTravelMode.DRIVING},function(res,sts) {
        if(sts=='OK') {
                    directionResult.push(res);
                    ren.setDirections(res); 

                } else {
                    directionResult.push(null);
                }
        });     
    }
 });
}  

Answer 1

我有一个 demo哪个可以满足您的需求。

你需要的改变在

directionsDisplay = new google.maps.DirectionsRenderer( {
'map': map,
'preserveViewport': true,
'draggable':true/*, 
'suppressMarkers' : true */} 
);
directionsDisplay.setMap(map);
directionsDisplay.setPanel(document.getElementById("directionsPanel"));
directionsService = new google.maps.DirectionsService();    
    }
});

注意 suppressMarkers' : true 已被注释掉

这意味着当显示方向标记时，原始标记仍然存在。这些被删除使用

function clearOverlays() {
 if (wayA) {
   for (i in wayA) {
   wayA[i].setMap(null);
 }
 }
 if (wayB) {
   for (i in wayB) {
     wayB[i].setMap(null);
  }
}
}

这在结束时调用

  function calcRoute() {

directionsService.route({ 'origin': wayA[wayA.length-1].getPosition(), 'destination': 
      wayB[wayB.length-1].getPosition(), 'travelMode': 
 google.maps.DirectionsTravelMode.DRIVING},function(response,status) {
    if(status == google.maps.DirectionsStatus.OK) {
                directionResult.push(response);
                directionsDisplay.setDirections(response);  

            } else {
                directionResult.push(null);
            }

})
clearOverlays();
}