Place Autocomplete and Directions

by Lawrence Ross

HTML

<div>
  <input id="start" class="controls" type="text" placeholder="Enter an origin location">

  <input id="end" class="controls" type="text" placeholder="Enter a destination location">

  <input id="waypoints" class="controls" type="text" placeholder="Enter a destination location">

  <div id="mode-selector" class="controls">
    <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>

<div id="map"></div>
<!-- Replace the value of the key parameter with your own API key. -->
<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk&libraries=places&callback=initMap" async defer></script>

CSS

/* Always set the map height explicitly to define the size of the div
 * element that contains the map. */
#map {
  height: 100%;
}

/* Optional: Makes the sample page fill the window. */
html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}

.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);
}

#start,
#waypoints,
#end {
  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;
}

#start:focus,
#waypoints:focus,
#end: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;
}

JavaScript

// This example requires the Places library. Include the libraries=places
// parameter when you first load the API. For example:
// <script
// src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&libraries=places">

function initMap() {
  var map = new google.maps.Map(document.getElementById('map'), {
    mapTypeControl: false,
    center: {
      lat: -33.8688,
      lng: 151.2195
    },
    zoom: 13
  });

  new AutocompleteDirectionsHandler(map);
}

/**
 * @constructor
 */
function AutocompleteDirectionsHandler(map) {
  this.map = map;
  this.originPlaceId = null;
  this.destinationPlaceId = null;
  this.destinationPlaceId2 = null;

  this.travelMode = 'DRIVING';
  this.directionsService = new google.maps.DirectionsService;
  this.directionsRenderer = new google.maps.DirectionsRenderer;
  this.directionsRenderer.setMap(map);

  var originInput = document.getElementById('start');
  var destinationInput = document.getElementById('waypoints');
  var destinationInput2 = document.getElementById('end');

  //var modeSelector = document.getElementById('mode-selector');

  var originAutocomplete = new google.maps.places.Autocomplete(originInput);
  // Specify just the place data fields that you need.
  originAutocomplete.setFields(['place_id']);

  var destinationAutocomplete2 =
    new google.maps.places.Autocomplete(destinationInput);
  destinationAutocomplete2.setFields(['place_id']);

  var destinationAutocomplete =
    new google.maps.places.Autocomplete(destinationInput2);
  // Specify just the place data fields that you need.
  destinationAutocomplete.setFields(['place_id']);

  this.setupPlaceChangedListener(originAutocomplete, 'ORIG');
  this.setupPlaceChangedListener(destinationAutocomplete, 'DEST');
  this.setupPlaceChangedListener(destinationAutocomplete2, 'DEST2');

}

AutocompleteDirectionsHandler.prototype.setupPlaceChangedListener = function(
  autocomplete, mode) {
  var me = this;
  autocomplete.bindTo('bounds', this.map);


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