136 lines
4.0 KiB
HTML
136 lines
4.0 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
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<meta name="apple-mobile-web-app-capable" content="yes">
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<title>OpenLayers Layer Load Monitoring 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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<style type="text/css">
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#controls {
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float: left;
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text-align: right;
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}
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#eventsLogID {
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text-align: left;
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width: 350px;
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height: 475px;
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overflow: auto;
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border: 1px solid black;
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}
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</style>
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<script src="../lib/Firebug/firebug.js"></script>
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<script src="../lib/OpenLayers.js"></script>
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<script type="text/javascript">
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var lon = 5;
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var lat = 40;
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var zoom = 5;
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var map, layer;
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function init(){
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eventsLog = OpenLayers.Util.getElement("eventsLogID");
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map = new OpenLayers.Map( 'map' );
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map.addControl(new OpenLayers.Control.LayerSwitcher());
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buffer0 = new OpenLayers.Layer.WMS( "WMS Buffer 0",
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"http://vmap0.tiles.osgeo.org/wms/vmap0",
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{layers: 'basic'} ,
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{ singleTile: false, buffer:0}
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);
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registerEvents(buffer0);
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buffer1 = new OpenLayers.Layer.WMS( "WMS Buffer 1",
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"http://vmap0.tiles.osgeo.org/wms/vmap0",
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{layers: 'basic'} ,
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{ singleTile: false, buffer:1}
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);
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registerEvents(buffer1);
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buffer2 = new OpenLayers.Layer.WMS( "WMS Buffer 2",
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"http://vmap0.tiles.osgeo.org/wms/vmap0",
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{layers: 'basic'} ,
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{ singleTile: false, buffer:2 }
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);
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registerEvents(buffer2);
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singleTileLayer = new OpenLayers.Layer.WMS( "Single Tile Layer",
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"http://vmap0.tiles.osgeo.org/wms/vmap0",
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{layers: 'basic'} ,
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{ singleTile: true}
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);
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registerEvents(singleTileLayer);
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map.setCenter(new OpenLayers.LonLat(lon, lat), zoom);
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}
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function registerEvents(layer) {
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layer.logEvent = function(event) {
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eventsLog.innerHTML += "<br>(" + getTimeStamp() + ") " +
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this.name + ": " + event;
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};
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layer.events.register("loadstart", layer, function() {
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this.logEvent("Load Start");
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});
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layer.events.register("tileloaded", layer, function() {
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this.logEvent("Tile loaded. " + this.numLoadingTiles + " left.");
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});
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layer.events.register("loadend", layer, function() {
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this.logEvent("Load End. Grid:" + this.grid.length + "x" + this.grid[0].length);
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});
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map.addLayer(layer);
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}
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function getTimeStamp() {
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var date = new Date();
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var timeParts = [
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date.getHours(),
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date.getMinutes(),
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date.getSeconds()
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];
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var timeStamp = timeParts.join(":");
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return timeStamp;
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}
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function clearLog() {
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eventsLog.innerHTML = "<b>Events Log:</b>";
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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">Layer Load Monitoring Example</h1>
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<div id="tags">
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monitor, loading, light
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</div>
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<p id="shortdesc">
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Demonstrate a method for monitoring tile loading performance.
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</p>
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<div id="map" class="smallmap" style="float:left;"></div>
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<div id="controls">
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<div id="eventsLogID">
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<b>Events Log:</b>
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</div>
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<input type="button" value="Clear" onclick="clearLog()"/>
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</div>
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<div id="docs">
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</div>
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</body>
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</html>
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