2f0382e6f6
* new convenience method addUniqueValueRules in OL.!StyleMap. This can actually be used to achieve what I was trying to show in the example of this ticket's description. * some refactoring of OL.Style to remove duplicate code (with tests) * a new example showing how to add a "unique value" legend to a point layer using the new addUniqueValueRules method * Rule.symbolizer can now also be just a symbolizer, instead of a hash of symbolizers keyed by "Point", "Line", "Polygon". This will make things even simpler (as can be seen in the styles-unique.html example) r=tschaub (closes #1373) git-svn-id: http://svn.openlayers.org/trunk/openlayers@6396 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
73 lines
2.5 KiB
HTML
73 lines
2.5 KiB
HTML
<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>OpenLayers Styles Unique Value Styles Example</title>
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<link rel="stylesheet" href="../theme/default/style.css" type="text/css" />
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<style type="text/css">
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#map {
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width: 800px;
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height: 400px;
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border: 1px solid black;
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}
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</style>
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<script src="../lib/OpenLayers.js"></script>
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<script type="text/javascript">
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var map, layer;
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function init(){
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map = new OpenLayers.Map('map', {maxResolution:'auto'});
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var wms = new OpenLayers.Layer.WMS( "OpenLayers WMS",
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"http://labs.metacarta.com/wms/vmap0", {layers: 'basic'} );
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map.addLayer(wms);
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map.setCenter(new OpenLayers.LonLat(0, 0), 0);
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// create 20 random features with a random type attribute. The
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// type attribute is a value between 0 and 2.
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var features = new Array(20);
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for (var i=0; i<20; i++) {
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features[i] = new OpenLayers.Feature.Vector(
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new OpenLayers.Geometry.Point(Math.random()*360-180, Math.random()*180-90),
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{type: parseInt(Math.random()*3)}
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);
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}
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// create a styleMap with a custom default symbolizer
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var styleMap = new OpenLayers.StyleMap({
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fillOpacity: 1,
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pointRadius: 10
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});
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// create a lookup table with different symbolizers for 0, 1 and 2
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var lookup = {
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0: {externalGraphic: "../img/marker-blue.png"},
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1: {externalGraphic: "../img/marker-green.png"},
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2: {externalGraphic: "../img/marker-gold.png"}
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}
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// add rules from the above lookup table, with the keyes mapped to
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// the "type" property of the features, for the "default" intent
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styleMap.addUniqueValueRules("default", "type", lookup);
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layer = new OpenLayers.Layer.Vector('Points', {
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styleMap: styleMap
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});
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layer.addFeatures(features);
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map.addLayer(layer);
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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">Unique Value Styles Example</h1>
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<div id="tags"></div>
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<p id="shortdesc">
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Shows how to create a style based on unique feature attribute values.
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</p>
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<div id="map"></div>
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<div id="docs"></div>
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</body>
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</html>
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