如何从访问者的当前位置获取方向到我在嵌入式谷歌地图中的位置

Question

我的网站上有一个嵌入式地图，其中包含指向我办公室地址的标记点。但是，我需要通过Web浏览器中的地理位置自动向用户显示从当前位置到我办公室位置的路线。可能吗？

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <title>Find a route using Geolocation and Google Maps API</title>
    <script src="http://maps.google.com/maps/api/js?sensor=true"></script>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
    <script>
      function calculateRoute(from, to) {
        // Center initialized to Naples, Italy
        var myOptions = {
          zoom: 10,
          center: new google.maps.LatLng(40.84, 14.25),
          mapTypeId: google.maps.MapTypeId.ROADMAP
        };
        // Draw the map
        var mapObject = new google.maps.Map(document.getElementById("map"), myOptions);

        var directionsService = new google.maps.DirectionsService();
        var directionsRequest = {
          origin: from,
          destination: to,
          travelMode: google.maps.DirectionsTravelMode.DRIVING,
          unitSystem: google.maps.UnitSystem.METRIC
        };
        directionsService.route(
          directionsRequest,
          function(response, status)
          {
            if (status == google.maps.DirectionsStatus.OK)
            {
              new google.maps.DirectionsRenderer({
                map: mapObject,
                directions: response
              });
            }
            else
              $("#error").append("Unable to retrieve your route<br />");
          }
        );
      }

      $(document).ready(function() {
        // If the browser supports the Geolocation API
        if (typeof navigator.geolocation == "undefined") {
          $("#error").text("Your browser doesn't support the Geolocation API");
          return;
        }

        $("#from-link, #to-link").click(function(event) {
          event.preventDefault();
          var addressId = this.id.substring(0, this.id.indexOf("-"));

          navigator.geolocation.getCurrentPosition(function(position) {
            var geocoder = new google.maps.Geocoder();
            geocoder.geocode({
              "location": new google.maps.LatLng(position.coords.latitude, position.coords.longitude)
            },
            function(results, status) {
              if (status == google.maps.GeocoderStatus.OK)
                $("#" + addressId).val(results[0].formatted_address);
              else
                $("#error").append("Unable to retrieve your address<br />");
            });
          },
          function(positionError){
            $("#error").append("Error: " + positionError.message + "<br />");
          },
          {
            enableHighAccuracy: true,
            timeout: 10 * 1000 // 10 seconds
          });
        });

        $("#calculate-route").submit(function(event) {
          event.preventDefault();
          calculateRoute($("#from").val(), "govandi"));
        });
      });
    </script>
    <style type="text/css">
      #map {
        width: 500px;
        height: 400px;
        margin-top: 10px;
      }
    </style>
  </head>
  <body>
    <h1>Calculate your route</h1>
    <form id="calculate-route" name="calculate-route" action="#" method="get">
      <label for="from">From:</label>
      <input type="text" id="from" name="from" required="required" placeholder="An address" size="30" />
      <a id="from-link" href="#">Get my position</a>
      <br />

      <label for="to">To:</label>
      <input type="text" id="to" name="to" placeholder="Another address" size="30" />
      <a id="to-link" href="#">Get my position</a>
      <br />

      <input type="submit" />
      <input type="reset" />
    </form>
    <div id="map"></div>
    <p id="error"></p>
  </body>
</html>

Answer 1

另一答案