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