Example of a Layer swipe map.
Example of a Layer swipe map.
<!DOCTYPE html>
<html>
<head>
<title>Layer Swipe example</title>
<script src="https://code.jquery.com/jquery-1.11.2.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="http://openlayers.org/en/v3.9.0/css/ol.css" type="text/css">
<script src="http://openlayers.org/en/v3.9.0/build/ol.js"></script>
</head>
<body>
<div class="container-fluid">
<div class="row-fluid">
<div class="span12">
<div id="map" class="map"></div>
<input id="swipe" type="range" style="width: 100%">
</div>
</div>
</div>
<script>
var osm = new ol.layer.Tile({
source: new ol.source.OSM()
});
var bing = new ol.layer.Tile({
source: new ol.source.BingMaps({
key: 'Ak-dzM4wZjSqTlzveKz5u0d4IQ4bRzVI309GxmkgSVr1ewS6iPSrOvOKhA-CJlm3',
imagerySet: 'Aerial'
})
});
var map = new ol.Map({
layers: [osm, bing],
target: 'map',
controls: ol.control.defaults({
attributionOptions: /** @type {olx.control.AttributionOptions} */ ({
collapsible: false
})
}),
view: new ol.View({
center: [0, 0],
zoom: 2
})
});
var swipe = document.getElementById('swipe');
bing.on('precompose', function(event) {
var ctx = event.context;
var width = ctx.canvas.width * (swipe.value / 100);
ctx.save();
ctx.beginPath();
ctx.rect(width, 0, ctx.canvas.width - width, ctx.canvas.height);
ctx.clip();
});
bing.on('postcompose', function(event) {
var ctx = event.context;
ctx.restore();
});
swipe.addEventListener('input', function() {
map.render();
}, false);
</script>
</body>
</html>