Navigation Functions (Heading)

by Lawrence Ross

HTML

<div class="header">
  <div class="row">
    <h1>Calculate driving distance between two cities</h1>
  </div>
</div>

<div class="container">
  <form>
    <!-- Location 1 -->
    <div class="row">
      <div class="location-label">
        <label>Origin: </label>
      </div>
      <div class="location-input">
        <input type="text" id="location-1" name="origin" placeholder="Enter a start location...">
      </div>
    </div>
    <!-- Location 2 -->
    <div class="row">
      <div class="location-label">
        <label>Destination: </label>
      </div>
      <div class="location-input">
        <input type="text" id="location-2" name="destination" placeholder="Enter a last location...">
      </div>
    </div>

    <!-- Submit button -->
    <div class="row">
      <button class="button" type="button" onclick="clearRoute();">Clear</button>
      <button class="button" type="button" onclick="calcRoute();">Submit</button>
    </div>

    <!-- Stats table -->
    <div id="output" class="result-table"></div>
  </form>

  <div class="container-map" id="google-map"></div>
</div>

<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk&libraries=places"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

CSS

* {
    margin: auto;
    box-sizing: border-box;
}

html {
    font-size: 62.5%;
    height: 100%;
}

body{
    height: 100%;
    background-image: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    background-size: cover;
    background-position: top;
    font-family: "Lato", sans-serif;
    font-weight: 400;
    line-height: 1.7;
    color: #000;
}

/* Clearfix */
.row::after{
    content: "";
    display: table;
    clear:both;
}

.header{
    display: block;
    font-size: 1.2rem;
    font-weight: 400;
    padding: 1rem;
    margin: 2rem auto;
}

.header h1{
    color: #19244e;
    text-align: center;
    text-transform: uppercase;
    text-decoration: none;
}

.container{
    width: 65vw;
    height: 100%;
    border-radius: 1rem;
    background-color: #fff;
    padding: 2rem;
}

.location-label{
    font-size: 1.6rem;
    float: left;
    width: 25%;
    margin-top: .6rem;
}

.location-input{
    float: left;
    width: 75%;
    margin-top: .6rem;
}

.location-input::-webkit-input-placeholder {
    color:#465caa;
}

::-moz-placeholder {
    color: #465caa;
}

::-ms-placeholder {
    color:#465caa;
}

::placeholder {
    color:#465caa;
}

.button{
    background-image: linear-gradient(to top, #48c6ef 0%, #6f86d6 100%);
    text-transform: uppercase;
    text-decoration: none;
    outline:none;
    color: white;
    padding: 1.2rem 2.2rem;
    border: none;
    border-radius: 1rem;
    cursor: pointer;
    float: right;
    margin-bottom: 1rem;
    margin-right: .5rem;
    transition: ease-in-out .1s;
}

.button:hover{    
    background-image: linear-gradient(-225deg, #A445B2 0%, #D41872 52%, #FF0066 100%);
    transform: scale(1.015);
    transition: ease-in .1s;
}

.result-table{
    font-size: 1.6rem;
    border-collapse: collapse;
    border-spacing: 0;
    width: 100%;
    height: 10rem;    

    /* Animation */
    animation-name: moveIn;
    animation-duration: 1s;
    animation-timing-function: ease-out;
}

.container-map{
    width: 100%;
   ...

JavaScript

var myLatLng = { lat: 38.736946, lng: -9.142685 };
var mapOptions = {
    center: myLatLng,
    zoom: 1,
    mapTypeId: google.maps.MapTypeId.ROADMAP
};

// Hide result box
document.getElementById("output").style.display = "none";

// Create/Init map
var map = new google.maps.Map(document.getElementById('google-map'), mapOptions);

// Create a DirectionsService object to use the route method and get a result for our request
var directionsService = new google.maps.DirectionsService();

// Create a DirectionsRenderer object which we will use to display the route
var directionsDisplay = new google.maps.DirectionsRenderer();

// Bind the DirectionsRenderer to the map
directionsDisplay.setMap(map);


// Define calcRoute function
function calcRoute() {
    //create request
    var request = {
        origin: document.getElementById("location-1").value,
        destination: document.getElementById("location-2").value,
        travelMode: google.maps.TravelMode.DRIVING,
        unitSystem: google.maps.UnitSystem.METRIC
    }

    // Routing
    directionsService.route(request, function (result, status) {
        if (status == google.maps.DirectionsStatus.OK) {

            //Get distance and time            
            
            $("#output").html("<div class='result-table'> Driving distance: " + result.routes[0].legs[0].distance.text + ".<br />Duration: " + result.routes[0].legs[0].duration.text + ".</div>");
            document.getElementById("output").style.display = "block";

            //display route
            directionsDisplay.setDirections(result);
        } else {
            //delete route from map
            directionsDisplay.setDirections({ routes: [] });
            //center map in London
            map.setCenter(myLatLng);

            //Show error message           
           
            alert("Can't find road! Please try again!");
            clearRoute();
        }
    });

}

// Clear results

function clearRoute(){
   ...