openlayers-test
Version:
Build tools and sources for developing OpenLayers based mapping applications
61 lines (51 loc) • 2.35 kB
HTML
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="chrome=1">
<meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
<link rel="stylesheet" href="../css/ol.css" type="text/css">
<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap.min.css" type="text/css">
<link rel="stylesheet" href="../resources/layout.css" type="text/css">
<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap-responsive.min.css" type="text/css">
<title>Layer Spy Example</title>
</head>
<body>
<div class="navbar navbar-inverse navbar-fixed-top">
<div class="navbar-inner">
<div class="container">
<a class="brand" href="./"><img src="../resources/logo.png"> OpenLayers 3 Examples</a>
</div>
</div>
</div>
<div class="container-fluid">
<div class="row-fluid">
<div class="span12">
<div id="map" class="map"></div>
</div>
</div>
<div class="row-fluid">
<div class="span12">
<h4 id="title">Layer spy example</h4>
<p id="shortdesc">View a portion of one layer over another</p>
<div id="docs">
<p>
Layer rendering can be manipulated in <code>precompose</code> and <code>postcompose</code> event listeners.
These listeners get an event with a reference to the Canvas rendering context.
In this example, the <code>precompose</code> listener sets a clipping mask around the most
recent mouse position, giving you a spyglass effect for viewing one layer over another.
</p>
<p>
Move around the map to see the effect. Use the ↑ up and ↓ down arrow keys to adjust the spyglass size.
</p>
<p>See the <a href="layer-spy.js" target="_blank">layer-spy.js source</a> to see how this is done.</p>
</div>
<div id="tags">spy, image manipulation</div>
</div>
</div>
</div>
<script src="../resources/jquery.min.js" type="text/javascript"></script>
<script src="../resources/example-behaviour.js" type="text/javascript"></script>
<script src="loader.js?id=layer-spy" type="text/javascript"></script>
</body>
</html>