I using the same code from http://www.aspsnippets.com/Articles/Google-Maps-V3-Draw-route-line-between-two-geographic-locations-Coordinates-Latitude-and-Longitude-points.aspx here i can have n number of point I am trying to change the color of stroke it is not reflecting
<!DOCTYPE html >
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
</head>
<body>
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
var markers = [
{
"title": 'Alibaug',
"lat": '18.641400',
"lng": '72.872200',
"description": 'xxxx'
}
,
{
"title": 'Mumbai',
"lat": '18.964700',
"lng": '72.825800',
"description": 'yyyy'
}
,
{
"title": 'Pune',
"lat": '18.523600',
"lng": '73.847800',
"description": 'zzz'
}
];
window.onload = function () {
var mapOptions = {
center: new google.maps.LatLng(markers[0].lat, markers[0].lng),
zoom: 10,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("dvMap"), mapOptions);
var infoWindow = new google.maps.InfoWindow();
var lat_lng = new Array();
var latlngbounds = new google.maps.LatLngBounds();
for (i = 0; i < markers.length; i++) {
var data = markers[i]
var myLatlng = new google.maps.LatLng(data.lat, data.lng);
lat_lng.push(myLatlng);
var marker = new google.maps.Marker({
position: myLatlng,
map: map,
title: data.title
});
latlngbounds.extend(marker.position);
(function (marker, data) {
google.maps.event.addListener(marker, "click", function (e) {
infoWindow.setContent(data.description);
infoWindow.open(map, marker);
});
})(marker, data);
}
map.setCenter(latlngbounds.getCenter());
map.fitBounds(latlngbounds);
//***********ROUTING****************//
//Intialize the Path Array
var path = new google.maps.MVCArray();
//Intialize the Direction Service
var service = new google.maps.DirectionsService();
//Set the Path Stroke Color
var poly = new google.maps.Polyline({ map: map, strokeColor: 'red' });
//Loop and Draw Path Route between the Points on MAP
for (var i = 0; i < lat_lng.length; i++) {
if ((i + 1) < lat_lng.length) {
var src = lat_lng[i];
var des = lat_lng[i + 1];
path.push(src);
poly.setPath(path);
service.route({
origin: src,
destination: des,
travelMode: google.maps.DirectionsTravelMode.DRIVING
}, function (result, status) {
if (status == google.maps.DirectionsStatus.OK) {
for (var i = 0, len = result.routes[0].overview_path.length; i < len; i++) {
path.push(result.routes[0].overview_path[i]);
}
}
});
}
}
}
</script>
<div id="dvMap" style="width: 500px; height: 500px">
</div>
</body>
</html>
and replaced this line with
var poly = new google.maps.Polyline({ map: map, strokeColor: 'red' });
and i tried to add color using the below code as
var colorVariable = ["white","green","blue","yellow","rose"];
for(var a =0;a<=5;a++){
var polyOptions = {
strokeColor: colorVariable[a],
strokeOpacity: 1.0,
strokeWeight: 2
}
poly = new google.maps.Polyline({ map: map, strokeColor: polyOptions });
poly.setMap(map);
}
but i am not getting the different color strokes please say how to integrated it what is wrong in it
I used a trick to find out which request is being processed, by looking at if (result.request.origin == lat_lng[i]) . (There might exist more elegant solutions)
I added a 4th point (just to see 1 more color, see if it works).
Is this what you want?
<!DOCTYPE html >
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Changing color for the Multiple Polyline stroke on Google maps</title>
</head>
<body>
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
var polylines = []; // let's make 1 polyline per color
var markers = [
{
"title": 'Alibaug',
"lat": 18.641400,
"lng": 72.872200,
"description": 'xxxx'
},
{
"title": 'Mumbai',
"lat": 18.964700,
"lng": 72.825800,
"description": 'yyyy'
},
{
"title": 'Pune',
"lat": 18.523600,
"lng": 73.847800,
"description": 'zzz'
},
{
"title": 'Kolhapur',
"lat": 16.696530010128207,
"lng": 74.23864138126372,
"description": 'Extra point'
}
];
window.onload = function () {
var mapOptions = {
center: new google.maps.LatLng(markers[0].lat, markers[0].lng),
zoom: 10,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("dvMap"), mapOptions);
var infoWindow = new google.maps.InfoWindow();
var lat_lng = []; // new Array();
var latlngbounds = new google.maps.LatLngBounds();
for (i = 0; i < markers.length; i++) {
var data = markers[i];
var myLatlng = new google.maps.LatLng(data.lat, data.lng);
lat_lng.push(myLatlng);
var marker = new google.maps.Marker({
position: myLatlng,
map: map,
title: data.title
});
latlngbounds.extend(marker.position);
(function (marker, data) {
google.maps.event.addListener(marker, "click", function (e) {
infoWindow.setContent(data.description);
infoWindow.open(map, marker);
});
})(marker, data);
}
map.setCenter(latlngbounds.getCenter());
map.fitBounds(latlngbounds);
//***********ROUTING****************//
// Make the polyline
//Loop and Draw Path Route between the Points on MAP
for (var i = 0; i< lat_lng.length; i++) {
generatePath(i); // I put this all in a function
}
// we want to know which request is being processed
function indexOfRequest(result) {
for (var i = 0; i <= lat_lng.length; i++) {
if (result.request.origin == lat_lng[i]) {
return i;
}
}
}
function generatePath(i) {
// colors
var colorVariable = ["white", "green", "blue", "yellow", "rose"];
//Intialize the Direction Service
var service = new google.maps.DirectionsService();
//Intialize the Path Array
var path = new google.maps.MVCArray();
var color = colorVariable[i % colorVariable.length]; // the % makes sure the array cycles, so after rose, it's white again
var poly = new google.maps.Polyline({ map: map, strokeColor: color });
polylines.push(poly);
var src = lat_lng[i];
var des = lat_lng[i + 1];
path.push(src);
poly.setPath(path);
// route service
service.route({
origin: src,
destination: des,
travelMode: google.maps.DirectionsTravelMode.DRIVING
}, function (result, status) {
if (status == google.maps.DirectionsStatus.OK) {
var routeIndex = indexOfRequest(result);
polylines[routeIndex].setPath(result.routes[0].overview_path);
}
});
}
}
</script>
<div id="dvMap" style="width: 500px; height: 500px">
</div>
</body>
</html>