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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>OpenLayers Click Event Example</title>
<link rel="stylesheet" href="openlayers/theme/default/style.css" type="text/css">
<link rel="stylesheet" href="style.css" type="text/css">
<script src="openlayers/OpenLayers.js"></script>
<script type="text/javascript">
OpenLayers.Control.Click = OpenLayers.Class(OpenLayers.Control, {
defaultHandlerOptions: {
'single': true,
'double': false,
'pixelTolerance': 0,
'stopSingle': false,
'stopDouble': false
},
initialize: function(options) {
this.handlerOptions = OpenLayers.Util.extend(
{}, this.defaultHandlerOptions
);
OpenLayers.Control.prototype.initialize.apply(
this, arguments
);
this.handler = new OpenLayers.Handler.Click(
this, {
'click': this.trigger
}, this.handlerOptions
);
},
trigger: function(e) {
var lonlat = map.getLonLatFromPixel(e.xy);
alert("You clicked near " + lonlat.lat + " N, " +
+ lonlat.lon + " E");
}
});
var map;
function init(){
map = new OpenLayers.Map('map');
var ol_wms = new OpenLayers.Layer.WMS( "OpenLayers WMS",
"http://vmap0.tiles.osgeo.org/wms/vmap0?", {layers: 'basic'} );
var jpl_wms = new OpenLayers.Layer.WMS( "NASA Global Mosaic",
"http://t1.hypercube.telascience.org/cgi-bin/landsat7",
{layers: "landsat7"});
jpl_wms.setVisibility(false);
map.addLayers([ol_wms, jpl_wms]);
map.addControl(new OpenLayers.Control.LayerSwitcher());
// map.setCenter(new OpenLayers.LonLat(0, 0), 0);
map.zoomToMaxExtent();
var click = new OpenLayers.Control.Click();
map.addControl(click);
click.activate();
}
</script>
</head>
<body onload="init()">
<h1 id="title">Click Event Example</h1>
<div id="tags">
click control, double, doubleclick, double-click, event, events,
propagation, light
</div>
<p id="shortdesc">
This example shows the use of the click handler and
getLonLatFromPixel functions to trigger events on mouse click.
</p>
<div id="map" class="smallmap"></div>
<div id="docs">
<p>Using the Click handler allows you to (for example) catch clicks
without catching double clicks, something that standard browser
events don't do for you. (Try double clicking: you'll zoom in,
whereas using the browser click event, you would just get two
alerts.) This example click control shows you how to use it.</p>
</div>
</body>
</html>
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