Thursday, February 23, 2012

Google map pointed to current location

<pre>

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset=utf-8>
<meta name="viewport" content="width=620">
<title>HTML5 Demo: geolocation</title>
<link rel="stylesheet" href="css/html5demos.css">
<script src="js/h5utils.js"></script></head>
<body>
<section id="wrapper">
<header>

</header>
<meta name="viewport" content="width=620" />

<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<article>
<p>Finding your location: <span id="status">checking...</span></p>
</article>
<script>

function success(position) {
var s = document.querySelector('#status');

if (s.className == 'success') {
// not sure why we're hitting this twice in FF, I think it's to do with a cached result coming back
return;
}

s.innerHTML = "";
s.className = 'success';

var mapcanvas = document.createElement('div');
mapcanvas.id = 'mapcanvas';
mapcanvas.style.height = '400px';
mapcanvas.style.width = '560px';
document.querySelector('article').appendChild(mapcanvas);

var latlng = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);
var myOptions = {
zoom: 15,
center: latlng,
mapTypeControl: false,
navigationControlOptions: {style: google.maps.NavigationControlStyle.SMALL},
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("mapcanvas"), myOptions);

var marker = new google.maps.Marker({
position: latlng,
map: map,
title:"You are here!"
});
}

function error(msg) {
var s = document.querySelector('#status');
s.innerHTML = typeof msg == 'string' ? msg : "failed";
s.className = 'fail';
// console.log(arguments);
}

if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(success, error);
} else {
error('not supported');
}

</script>

</section>

<script src="js/prettify.packed.js"></script>
<script>
var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
</script>
<script>
try {
var pageTracker = _gat._getTracker("UA-1656750-18");
pageTracker._trackPageview();
} catch(err) {}</script>
</body>
</html>

</pre>

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