Below code shows the path between two latlongs :
function mapLocation() {
var directionsDisplay;
var directionsService = new google.maps.DirectionsService();
var map;
function initialize() {
directionsDisplay = new google.maps.DirectionsRenderer({
draggable: true
});
var city = new google.maps.LatLng(41.015137, 28.979530);
var mapOptions = {
zoom: 7,
center: city
};
map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
directionsDisplay.setMap(map);
calcRoute();
}
function calcRoute() {
var start = new google.maps.LatLng(41.01524, 28.975994);
var end = new google.maps.LatLng(41.013232, 28.978676);
var request = {
origin: start,
destination: end,
travelMode: google.maps.TravelMode.DRIVING
};
directionsService.route(request, function(response, status) {
if (status == google.maps.DirectionsStatus.OK) {
alert(response.routes[0].legs[0].distance.value + " meters");
directionsDisplay.setDirections(response);
directionsDisplay.setMap(map);
//alert(request.distance);
} else {
alert("Directions Request from " + start.toUrlValue(6) + " to " + end.toUrlValue(6) + " failed: " + status);
}
});
}
google.maps.event.addDomListener(window, 'load', initialize);
}
mapLocation();
The code always works, I can see the path all the time when I drag those two latlongs. But I want to get the position of latlongs after dragging. How can I do that? I tried to put alerts in various places in the codes but none of them worked. Can you help me with that?
function mapLocation() {
var directionsDisplay;
var directionsService = new google.maps.DirectionsService();
var map;
function initialize() {
directionsDisplay = new google.maps.DirectionsRenderer({
draggable: true
});
var city = new google.maps.LatLng(41.015137, 28.979530);
var mapOptions = {
zoom: 7,
center: city
};
map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
directionsDisplay.setMap(map);
calcRoute();
}
function calcRoute() {
var start = new google.maps.LatLng(41.01524, 28.975994);
var end = new google.maps.LatLng(41.013232, 28.978676);
var request = {
origin: start,
destination: end,
travelMode: google.maps.TravelMode.DRIVING
};
directionsService.route(request, function(response, status) {
if (status == google.maps.DirectionsStatus.OK) {
//alert(response.routes[0].legs[0].distance.value + " meters");
directionsDisplay.setDirections(response);
directionsDisplay.setMap(map);
//alert(request.distance);
} else {
alert("Directions Request from " + start.toUrlValue(6) + " to " + end.toUrlValue(6) + " failed: " + status);
}
});
}
google.maps.event.addDomListener(window, 'load', initialize);
}
mapLocation();html,
body,
#map-canvas {
height: 90%;
width: 100%;
margin: 0px;
padding: 0px
}<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk"></script> <body> <!-- <input type="button" id="routebtn" value="route" /> --> <div id="map-canvas"></div>
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Answer
The markers locations are in the directions property of the directionsDisplay. To retrieve them when the route changes, add an event listener to the directionsDisplay for the directions_changed event, parse the directions object returned for the start and end locations of the route. For your route, with only a single leg, they will be:
directionsDisplay.getDirections().routes[0].legs[0].start_location; directionsDisplay.getDirections().routes[0].legs[0].end_location;
To put them in a <input> field on the page:
google.maps.event.addListener(directionsDisplay, 'directions_changed', function() {
document.getElementById("startlatlng").value = directionsDisplay.getDirections().routes[0].legs[0].start_location.toUrlValue(6);
document.getElementById("endlatlng").value = directionsDisplay.getDirections().routes[0].legs[0].end_location.toUrlValue(6);
});
code snippet:
function mapLocation() {
var directionsDisplay;
var directionsService = new google.maps.DirectionsService();
var map;
function initialize() {
directionsDisplay = new google.maps.DirectionsRenderer({
draggable: true
});
var city = new google.maps.LatLng(41.015137, 28.979530);
var mapOptions = {
zoom: 7,
center: city
};
map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
directionsDisplay.setMap(map);
google.maps.event.addListener(directionsDisplay, 'directions_changed', function() {
document.getElementById("startlatlng").value = directionsDisplay.getDirections().routes[0].legs[0].start_location.toUrlValue(6);
document.getElementById("endlatlng").value = directionsDisplay.getDirections().routes[0].legs[0].end_location.toUrlValue(6);
});
calcRoute();
}
function calcRoute() {
var start = new google.maps.LatLng(41.01524, 28.975994);
var end = new google.maps.LatLng(41.013232, 28.978676);
var request = {
origin: start,
destination: end,
travelMode: google.maps.TravelMode.DRIVING
};
directionsService.route(request, function(response, status) {
if (status == google.maps.DirectionsStatus.OK) {
directionsDisplay.setDirections(response);
directionsDisplay.setMap(map);
} else {
alert("Directions Request from " + start.toUrlValue(6) + " to " + end.toUrlValue(6) + " failed: " + status);
}
});
}
google.maps.event.addDomListener(window, 'load', initialize);
}
mapLocation();html,
body,
#map-canvas {
height: 90%;
width: 100%;
margin: 0px;
padding: 0px
}<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk"></script> <body> <input type="text" id="startlatlng" /> <input type="text" id="endlatlng" /> <!-- <input type="button" id="routebtn" value="route" /> --> <div id="map-canvas"></div>