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index.ts
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index.ts
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/**
* @license
* Copyright 2019 Google LLC. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0
*/
// [START maps_directions_draggable]
function initMap(): void {
const map = new google.maps.Map(
document.getElementById("map") as HTMLElement,
{
zoom: 4,
center: { lat: -24.345, lng: 134.46 }, // Australia.
}
);
const directionsService = new google.maps.DirectionsService();
const directionsRenderer = new google.maps.DirectionsRenderer({
draggable: true,
map,
panel: document.getElementById("panel") as HTMLElement,
});
directionsRenderer.addListener("directions_changed", () => {
const directions = directionsRenderer.getDirections();
if (directions) {
computeTotalDistance(directions);
}
});
displayRoute(
"Perth, WA",
"Sydney, NSW",
directionsService,
directionsRenderer
);
}
function displayRoute(
origin: string,
destination: string,
service: google.maps.DirectionsService,
display: google.maps.DirectionsRenderer
) {
service
.route({
origin: origin,
destination: destination,
waypoints: [
{ location: "Adelaide, SA" },
{ location: "Broken Hill, NSW" },
],
travelMode: google.maps.TravelMode.DRIVING,
avoidTolls: true,
})
.then((result: google.maps.DirectionsResult) => {
display.setDirections(result);
})
.catch((e) => {
alert("Could not display directions due to: " + e);
});
}
function computeTotalDistance(result: google.maps.DirectionsResult) {
let total = 0;
const myroute = result.routes[0];
if (!myroute) {
return;
}
for (let i = 0; i < myroute.legs.length; i++) {
total += myroute.legs[i]!.distance!.value;
}
total = total / 1000;
(document.getElementById("total") as HTMLElement).innerHTML = total + " km";
}
declare global {
interface Window {
initMap: () => void;
}
}
window.initMap = initMap;
// [END maps_directions_draggable]
export {};