<!DOCTYPE html >
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
html { height: 100% }
body { height: 100%; margin: 0; padding: 0 }
</style>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Network Monitor</title>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
//<![CDATA[
var customIcons = {
1: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_blue.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
},
0: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_red.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
}
};
//global array to store our markers
var markersArray = [];
function load() {
var map = new google.maps.Map(document.getElementById("map"), {
center : new google.maps.LatLng(37.80815648152641, 140.95355987548828),
zoom : 13,
mapTypeId : 'roadmap'
});
var infoWindow = new google.maps.InfoWindow;
// your first call to get & process inital data
downloadUrl("nwmxml.php", processXML(data));
}
function processXML(data) {
var xml = data.responseXML;
var markers = xml.documentElement.getElementsByTagName("marker");
//clear markers before you start drawing new ones
resetMarkers(markersArray)
for(var i = 0; i < markers.length; i++) {
var host = markers[i].getAttribute("host");
var type = markers[i].getAttribute("active");
var lastupdate = markers[i].getAttribute("lastupdate");
var point = new google.maps.LatLng(parseFloat(markers[i].getAttribute("lat")), parseFloat(markers[i].getAttribute("lng")));
var html = "<b>" + "Host: </b>" + host + "<br>" + "<b>Last Updated: </b>" + lastupdate + "<br>";
var icon = customIcons[type] || {};
var marker = new google.maps.Marker({
map : map,
position : point,
icon : icon.icon,
shadow : icon.shadow
});
//store marker object in a new array
markersArray.push(marker);
bindInfoWindow(marker, map, infoWindow, html);
}
// set timeout after you finished processing & displaying the first lot of markers. Rember that requests on the server can take some time to complete. SO you want to make another one
// only when the first one is completed.
setTimeout(function() {
downloadUrl("nwmxml.php", processXML(data));
}, 5000);
}
//clear existing markers from the map
function resetMarkers(arr){
for (var i=0;i<arr.length; i++){
arr[i].setMap(null);
}
//reset the main marker array for the next call
arr=[];
}
function bindInfoWindow(marker, map, infoWindow, html) {
google.maps.event.addListener(marker, 'click', function() {
infoWindow.setContent(html);
infoWindow.open(map, marker);
});
}
function downloadUrl(url, callback) {
var request = window.ActiveXObject ? new ActiveXObject('Microsoft.XMLHTTP') : new XMLHttpRequest;
request.onreadystatechange = function() {
if(request.readyState == 4) {
request.onreadystatechange = doNothing;
callback(request, request.status);
}
};
request.open('GET', url, true);
request.send(null);
}
function doNothing() {}
//]]>
</script>
</head>
<body onload="load()">
<div id="map" style="width: 100%; height: 100%"></div>
</body>
</html>