AnimatedTileLayer Events
This example uses the onFrameLoaded event of the AnimatedTileLayer class to update a message about the currently displayed tile layer in the animation. For this example the weather radar tile service from the Iowa Environmental Mesonet of Iowa State University and animates it. This service provides radar images for the last 50 minutes over the USA broken up into 5 minute increments.
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta charset="utf-8" />
<script type='text/javascript'>
var map, animatedLayer;
//Weather tile url from Iowa Environmental Mesonet (IEM): https://mesonet.agron.iastate.edu/ogc/
var urlTemplate = 'https://mesonet.agron.iastate.edu/cache/tile.py/1.0.0/nexrad-n0q-{timestamp}/{zoom}/{x}/{y}.png';
//The time stamps values for the IEM service for the last 50 minutes broken up into 5 minute increments.
var timestamps = ['900913-m50m', '900913-m45m', '900913-m40m', '900913-m35m', '900913-m30m', '900913-m25m', '900913-m20m', '900913-m15m', '900913-m10m', '900913-m05m', '900913'];
var displayMessages = [];
function GetMap()
{
map = new Microsoft.Maps.Map('#myMap', {
credentials: 'Your Bing Maps Key',
center: new Microsoft.Maps.Location(39, -92),
zoom: 5
});
var tileSources = [];
//Create a tile source for each time stamp.
for (var i = 0; i < timestamps.length; i++) {
var tileSource = new Microsoft.Maps.TileSource({
uriConstructor: urlTemplate.replace('{timestamp}', timestamps[i])
});
tileSources.push(tileSource);
//Create a message to display for each frame of the animation based on the time stamp.
var msg = 'Current';
if (timestamps[i] != '900913') {
msg += ' -' + timestamps[i].replace('900913-m', '') + 'in';
}
displayMessages.push(msg);
}
//Create the animated tile layer and add it to the map.
animatedLayer = new Microsoft.Maps.AnimatedTileLayer({
mercator: tileSources,
frameRate: 500
});
//Add an event handler that fires for each frame of the animation.
Microsoft.Maps.Events.addHandler(animatedLayer, 'onFrameLoaded', function (e) {
var msg = displayMessages[e.index];
document.getElementById('messagePanel').innerText = msg;
});
map.layers.insert(animatedLayer);
}
</script>
<style>
#messagePanel{
position:absolute;
top:20px;
left:20px;
background-color:white;
padding:2px;
border-radius:15px;
width:110px;
text-align:center;
}
</style>
<script type='text/javascript' src='http://www.bing.com/api/maps/mapcontrol?callback=GetMap' async defer></script>
</head>
<body>
<div id="myMap" style="position:relative;width:600px;height:400px;"></div>
<div id="messagePanel"></div>
</body>
</html>
Running this code will display a map that is animating through weather radar tile layers. With each frame of the animation a message is displayed in the top left corner of the map related to the time stamp for the currently displayed tile layer frame.
