Bonjour,

Je suis entrain de tester api google map et pour cela j'ai effectuée l'exemple suivant :

Code : Sélectionner tout - Visualiser dans une fenêtre à part
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
<!DOCTYPE html>
<html>
  <head>
    <title>Place Autocomplete</title>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <meta charset="utf-8">
    <style>
      html, body {
        height: 100%;
        margin: 0;
        padding: 0;
      }
      #map {
        height: 100%;
      }
.controls {
  margin-top: 10px;
  border: 1px solid transparent;
  border-radius: 2px 0 0 2px;
  box-sizing: border-box;
  -moz-box-sizing: border-box;
  height: 32px;
  outline: none;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}
 
#origin-input,
#destination-input {
  background-color: #fff;
  font-family: Roboto;
  font-size: 15px;
  font-weight: 300;
  margin-left: 12px;
  padding: 0 11px 0 13px;
  text-overflow: ellipsis;
  width: 200px;
}
 
#origin-input:focus,
#destination-input:focus {
  border-color: #4d90fe;
}
 
#mode-selector {
  color: #fff;
  background-color: #4d90fe;
  margin-left: 12px;
  padding: 5px 11px 0px 11px;
}
 
#mode-selector label {
  font-family: Roboto;
  font-size: 13px;
  font-weight: 300;
}
 
 
    </style>
  </head>
  <body>
    <input id="origin-input" class="controls" type="text"
        placeholder="Enter an origin location">
 
    <input id="destination-input" class="controls" type="text"
        placeholder="Enter a destination location">
 
    <div id="mode-selector" class="controls" style="display: none">
      <input type="radio" name="type" id="changemode-walking" checked="checked" >
      <label for="changemode-walking">Walking</label>
 
      <input type="radio" name="type" id="changemode-transit">
      <label for="changemode-transit">Transit</label>
 
      <input type="radio" name="type" id="changemode-driving">
      <label for="changemode-driving">Driving</label>
    </div>
 
    <div id="map"></div>
 
    <script>
 
 
 
 
function initMap() {
  var origin_place_id = null;
  var destination_place_id = null;
  var travel_mode = google.maps.TravelMode.WALKING;
  var map = new google.maps.Map(document.getElementById('map'), {
    mapTypeControl: false,
    center: {lat: 48.8737793, lng: 2.2950156},
    zoom: 13
  });
 
 
  var directionsService = new google.maps.DirectionsService;
  var directionsDisplay = new google.maps.DirectionsRenderer;
  directionsDisplay.setMap(map);
 
  var origin_input = document.getElementById('origin-input');
  var destination_input = document.getElementById('destination-input');
 
 
 
  var modes = document.getElementById('mode-selector');
 
  map.controls[google.maps.ControlPosition.TOP_LEFT].push(origin_input);
  map.controls[google.maps.ControlPosition.TOP_LEFT].push(destination_input);
  map.controls[google.maps.ControlPosition.TOP_LEFT].push(modes);
 
  var origin_autocomplete = new google.maps.places.Autocomplete(origin_input);
  origin_autocomplete.bindTo('bounds', map);
  var destination_autocomplete =
      new google.maps.places.Autocomplete(destination_input);
  destination_autocomplete.bindTo('bounds', map);
 
  // Sets a listener on a radio button to change the filter type on Places
  // Autocomplete.
  function setupClickListener(id, mode) {
    var radioButton = document.getElementById(id);
    radioButton.addEventListener('click', function() {
      travel_mode = mode;
    });
  }
  setupClickListener('changemode-walking', google.maps.TravelMode.WALKING);
  setupClickListener('changemode-transit', google.maps.TravelMode.TRANSIT);
  setupClickListener('changemode-driving', google.maps.TravelMode.DRIVING);
 
  function expandViewportToFitPlace(map, place) {
    if (place.geometry.viewport) {
      map.fitBounds(place.geometry.viewport);
    } else {
      map.setCenter(place.geometry.location);
      map.setZoom(17);
    }
  }
 
  origin_autocomplete.addListener('place_changed', function() {
    var place = origin_autocomplete.getPlace();
    if (!place.geometry) {
      window.alert("Autocomplete's returned place contains no geometry");
      return;
    }
    expandViewportToFitPlace(map, place);
 
    // If the place has a geometry, store its place ID and route if we have
    // the other place ID
    origin_place_id = place.place_id;
    route(origin_place_id, destination_place_id, travel_mode,
          directionsService, directionsDisplay);
  });
 
  destination_autocomplete.addListener('place_changed', function() {
    var place = destination_autocomplete.getPlace();
 
    if (!place.geometry) {
      window.alert("Autocomplete's returned place contains no geometry");
      return;
    }
    expandViewportToFitPlace(map, place);
 
    // If the place has a geometry, store its place ID and route if we have
    // the other place ID
    destination_place_id = place.place_id;
    route(origin_place_id, destination_place_id, travel_mode,
          directionsService, directionsDisplay);
  });
 
  function route(origin_place_id, destination_place_id, travel_mode,
                 directionsService, directionsDisplay) {
    if (!origin_place_id || !destination_place_id) {
      return;
    }
    directionsService.route({
      origin: {'placeId': origin_place_id},
      destination: {'placeId': destination_place_id},
      travelMode: travel_mode
    }, function(response, status) {
      if (status === google.maps.DirectionsStatus.OK) {
        directionsDisplay.setDirections(response);
      } else {
        window.alert('Directions request failed due to ' + status);
      }
    });
  }
 
 
 
}
 
 
    </script>
    <script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCos12fMCZ3i2Uk3Wp-hYx7vmQSHuc1ueA&signed_in=true&libraries=places&callback=initMap"
        async defer></script>
  </body>
</html>

Cette exemple m'affiche le trajet entre deux villes mais ce que je souhaite ajouter le nombre de km entre ces deux villes.

Est-ce-que vous pouvez m'aider s'il vous plait à modifier la page ?

Merci.