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"Vector features won't draw in IE if features are very far outside the visible extent". r=elemoine (closes #1602)

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git-svn-id: http://svn.openlayers.org/trunk/openlayers@7546 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
ahocevar
2008-07-18 12:24:46 +00:00
parent eac4ff0c84
commit da1490dbe6
2 changed files with 152 additions and 1 deletions
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17
lib/OpenLayers/Renderer/VML.js
View File

@@ -498,6 +498,23 @@ OpenLayers.Renderer.VML = OpenLayers.Class(OpenLayers.Renderer.Elements, {
return this.nodeFactory(this.container.id + "_root", "olv:group");
},
/**
* Method: drawFeature
* Overrides the superclass's drawFeature method to take care of features
* that are outside the viewport.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>}
* style - {<Object>}
*/
drawFeature: function(feature, style) {
if (!feature.geometry.getBounds().intersectsBounds(this.extent)) {
style = {display: "none"};
}
OpenLayers.Renderer.Elements.prototype.drawFeature.apply(this,
[feature, style]);
},
/**************************************
* *
* GEOMETRY DRAWING FUNCTIONS *

134
tests/manual/vector-features-performance.html Normal file
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@@ -0,0 +1,134 @@
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Vector Features Performance Test</title>
<style type="text/css">
body {
font-size: 0.8em;
}
p {
padding-top: 1em;
}
#map {
margin: 1em;
width: 512px;
height: 512px;
}
</style>
<script src="../../lib/Firebug/firebug.js"></script>
<script src="../../lib/OpenLayers.js"></script>
<script type="text/javascript">
var map, wmsLayer, vectorLayer, drawFeature, features
var run = 0;
function nextRun() {
window.setTimeout(function() {
if (run < 5) {
vectorLayer.removeFeatures(features);
}
}, 750);
window.setTimeout(function(){
run++;
switch(run) {
case 1:
wmsLayer.events.register("loadend", this, vectorTestNew);
console.log("First run - feature bboxes will be cached");
map.setCenter(new OpenLayers.LonLat(-22.5, -22.5), 3);
break;
case 2:
console.log("Test with all features inside extent");
map.layers[0].redraw(true);
break;
case 3:
vectorTestOld();
break;
case 4:
console.log("Test with some features outside extent");
map.setCenter(new OpenLayers.LonLat(-22.5, -22.5), 5);
break;
case 5:
wmsLayer.events.unregister("loadend", this, vectorTestNew);
vectorTestOld();
break;
}
}, 1000);
}
function vectorTestOld(){
vectorLayer.renderer.drawFeature = function(feature, style) {
if(style == null) {
style = feature.style;
}
if (feature.geometry) {
this.drawGeometry(feature.geometry, style, feature.id);
}
};
console.time("addFeaturesOld");
vectorLayer.addFeatures(features);
console.timeEnd("addFeaturesOld");
}
function vectorTestNew() {
vectorLayer.renderer.drawFeature = drawFeature;
console.time("addFeatures");
vectorLayer.addFeatures(features);
console.timeEnd("addFeatures");
}
function init(){
map = new OpenLayers.Map('map');
wmsLayer = new OpenLayers.Layer.WMS("OpenLayers WMS", "http://labs.metacarta.com/wms/vmap0", {
layers: 'basic'
});
vectorLayer = new OpenLayers.Layer.Vector("Vector Layer");
drawFeature = vectorLayer.renderer.drawFeature;
map.addLayers([wmsLayer, vectorLayer]);
map.addControl(new OpenLayers.Control.MousePosition());
map.setCenter(new OpenLayers.LonLat(-22.5, -22.5), 3);
vectorLayer.events.register("featuresadded", this, nextRun);
features = new Array(100);
var x, y
for (var i = 0; i < 100; i++) {
x = -Math.random()*45;
y = -Math.random()*45;
features[i] = new OpenLayers.Feature.Vector(
new OpenLayers.Geometry.LinearRing([
new OpenLayers.Geometry.Point(
-Math.random()*5+x, -Math.random()*5+y),
new OpenLayers.Geometry.Point(
-Math.random()*5+x, -Math.random()*5+y),
new OpenLayers.Geometry.Point(
-Math.random()*5+x, -Math.random()*5+y),
new OpenLayers.Geometry.Point(
-Math.random()*5+x, -Math.random()*5+y),
new OpenLayers.Geometry.Point(
-Math.random()*5+x, -Math.random()*5+y)
]));
}
nextRun();
}
</script>
</head>
<body onload="init()">
<h1 id="title">Vector Features Performance Test</h1>
<div id="map"></div>
<p>
This test examines if checking for a feature being inside the visible
extent before rendering it has an impact on performance. Make sure that
the Firebug console is visible when running this test to see the results.
</p>
</body>
</html>