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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<meta name="apple-mobile-web-app-capable" content="yes">
<title>Custom Control Example</title>
<link rel="stylesheet" href="../theme/default/style.css" type="text/css">
<link rel="stylesheet" href="style.css" type="text/css">
<script src="../lib/OpenLayers.js"></script>
<script type="text/javascript">
var lon = 5;
var lat = 40;
var zoom = 5;
var map, layer;
function init(){
map = new OpenLayers.Map('map');
layer = new OpenLayers.Layer.WMS( "OpenLayers WMS",
"http://vmap0.tiles.osgeo.org/wms/vmap0", {layers: 'basic'} );
var control = new OpenLayers.Control();
OpenLayers.Util.extend(control, {
draw: function () {
// this Handler.Box will intercept the shift-mousedown
// before Control.MouseDefault gets to see it
this.box = new OpenLayers.Handler.Box( control,
{"done": this.notice},
{keyMask: OpenLayers.Handler.MOD_SHIFT});
this.box.activate();
},
notice: function (bounds) {
var ll = map.getLonLatFromPixel(new OpenLayers.Pixel(bounds.left, bounds.bottom));
var ur = map.getLonLatFromPixel(new OpenLayers.Pixel(bounds.right, bounds.top));
alert(ll.lon.toFixed(4) + ", " +
ll.lat.toFixed(4) + ", " +
ur.lon.toFixed(4) + ", " +
ur.lat.toFixed(4));
}
});
map.addLayer(layer);
map.addControl(control);
map.setCenter(new OpenLayers.LonLat(lon, lat), zoom);
}
</script>
</head>
<body onload="init()">
<h1 id="title">Custom Control Example</h1>
<div id="tags">
control, panel, rectangle, light
</div>
<p id="shortdesc">
Demonstrate the addition of a rectangle to the OpenLayers window.
</p>
<div id="map" class="smallmap"></div>
<div id="docs">
<p>The control allows you to draw a rectangle, that reports its coordinates
after creation. Hold down the shift key on your keyboard and draw a
rectangle with the mouse.</p>
</div>
</body>
</html>
|
