在Google路线上添加InfoWindow路线

Question

我正在尝试将InfoWindow添加到路线路线。有很多例子可以在标记上的事件监听器上添加InfoWindow。

但是如何将InfoWindow移动到从一个标记到另一个标记的实际计划路线上。有人已经尝试过问过这个问题，但没有回复（InfoWindow on Directions Route）。

无论如何，我做了大量的谷歌搜索，只发现了一个与此类似的问题，但是再次没有回应。

我在回调中的标记上尝试infowindow.open(map,this)，但它会在标记位置打开InfoWindow。它只是我希望显示类似谷歌的持续时间和距离。像附图中的东西

var infowindow2 = new google.maps.InfoWindow();
distanceService.getDistanceMatrix(distanceRequest, function (response, status) {
    if (status == "OK") {
      infowindow2.setContent(response.rows[0].elements[0].distance.text + "<br>" + response.rows[0].elements[0].duration.text + " ")
    }
    else {
      alert("Error: " + status)
    }
  })
infowindow2.open(map, this);

Answer 1

要在路线上找到位置并在其中放置infoWindow，请解析路线（the details are described in the documentation）。获取路线上的位置，并使用该位置调用infowindow的setPosition方法。

function calcRoute(start, end) {
  var request = {
      origin:start,
      destination:end,
      travelMode: google.maps.DirectionsTravelMode.DRIVING
  };
  directionsService.route(request, function(response, status) {
    if (status == google.maps.DirectionsStatus.OK) {
      directionsDisplay.setDirections(response);
      var step = 1;
      var infowindow2 = new google.maps.InfoWindow();
      infowindow2.setContent(response.routes[0].legs[0].steps[step].distance.text + "<br>" + response.routes[0].legs[0].steps[step].duration.text + " ");
      infowindow2.setPosition(response.routes[0].legs[0].steps[step].end_location);
      infowindow2.open(map);
    }
  });
}

如果您确实需要路线的中点，请参阅Midpoint of route in google maps

proof of concept fiddle

代码段

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

function initialize() {
  directionsDisplay = new google.maps.DirectionsRenderer();
  var chicago = new google.maps.LatLng(41.850033, -87.6500523);

  var mapOptions = {
    zoom: 7,
    mapTypeId: google.maps.MapTypeId.ROADMAP,
    center: chicago
  }
  map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
  directionsDisplay.setMap(map);
  calcRoute("67 The Windmill Hill, Allesley, Coventry CV5 9FR, UK", "26 Rosaville Crescent, Allesley, Coventry CV5 9BP, UK");
}

function calcRoute(start, end) {
  var request = {
    origin: start,
    destination: end,
    travelMode: google.maps.DirectionsTravelMode.DRIVING
  };
  directionsService.route(request, function(response, status) {
    if (status == google.maps.DirectionsStatus.OK) {
      directionsDisplay.setDirections(response);
      var step = Math.floor(response.routes[0].legs[0].steps.length / 2);
      var infowindow2 = new google.maps.InfoWindow();
      infowindow2.setContent(response.routes[0].legs[0].steps[step].distance.text + "<br>" + response.routes[0].legs[0].steps[step].duration.text + " ");
      infowindow2.setPosition(response.routes[0].legs[0].steps[step].end_location);
      infowindow2.open(map);
    }
  });
}

google.maps.event.addDomListener(window, 'load', initialize);

html,
body,
#map-canvas {
  height: 100%;
  margin: 0px;
  padding: 0px
}

#panel {
  position: absolute;
  top: 5px;
  left: 50%;
  margin-left: -180px;
  z-index: 5;
  background-color: #fff;
  padding: 5px;
  border: 1px solid #999;
}

<script src="https://maps.googleapis.com/maps/api/js"></script>
<div id="map-canvas"></div>

Answer 2

您可以使用overview_path数组来查找路径的中心点。然后将其设置为infowindow位置。

var center_point = response.routes[0].overview_path.length/2;

var infowindow = new google.maps.InfoWindow();
infowindow.setContent(response.routes[0].legs[0].distance.text + "<br>" + response.routes[0].legs[0].duration.text + " ");
infowindow.setPosition(response.routes[0].overview_path[center_point|0]);
infowindow.open(map);