c350fd6810
git-svn-id: http://svn.openlayers.org/trunk/openlayers@7095 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
82 lines
3.1 KiB
HTML
82 lines
3.1 KiB
HTML
<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>OpenLayers Click Event Example</title>
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<link rel="stylesheet" href="../theme/default/style.css" type="text/css" />
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<link rel="stylesheet" href="style.css" type="text/css" />
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<script src="../lib/OpenLayers.js"></script>
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<script type="text/javascript">
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OpenLayers.Control.Click = OpenLayers.Class(OpenLayers.Control, {
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defaultHandlerOptions: {
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'single': true,
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'double': false,
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'pixelTolerance': 0,
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'stopSingle': false,
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'stopDouble': false
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},
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initialize: function(options) {
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this.handlerOptions = OpenLayers.Util.extend(
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{}, this.defaultHandlerOptions
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);
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OpenLayers.Control.prototype.initialize.apply(
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this, arguments
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);
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this.handler = new OpenLayers.Handler.Click(
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this, {
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'click': this.trigger
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}, this.handlerOptions
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);
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},
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trigger: function(e) {
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var lonlat = map.getLonLatFromViewPortPx(e.xy);
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alert("You clicked near " + lonlat.lat + " N, " +
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+ lonlat.lon + " E");
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}
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});
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var map;
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function init(){
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map = new OpenLayers.Map('map');
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var ol_wms = new OpenLayers.Layer.WMS( "OpenLayers WMS",
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"http://labs.metacarta.com/wms/vmap0?", {layers: 'basic'} );
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var jpl_wms = new OpenLayers.Layer.WMS( "NASA Global Mosaic",
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"http://t1.hypercube.telascience.org/cgi-bin/landsat7",
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{layers: "landsat7"});
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jpl_wms.setVisibility(false);
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map.addLayers([ol_wms, jpl_wms]);
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map.addControl(new OpenLayers.Control.LayerSwitcher());
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// map.setCenter(new OpenLayers.LonLat(0, 0), 0);
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map.zoomToMaxExtent();
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var click = new OpenLayers.Control.Click();
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map.addControl(click);
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click.activate();
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}
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</script>
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</head>
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<body onload="init()">
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<h1 id="title">Click Event Example</h1>
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<div id="tags">
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</div>
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<p id="shortdesc">
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This example shows the use of the click handler and getLonLatFromViewPortPx functions to trigger events on mouse click.
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</p>
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<div id="map" class="smallmap"></div>
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<div id="docs">
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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.
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</div>
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</body>
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</html>
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