f84f696e31
git-svn-id: http://svn.openlayers.org/trunk/openlayers@11162 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
131 lines
5.4 KiB
HTML
131 lines
5.4 KiB
HTML
<html>
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<head>
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<script src="../OLLoader.js"></script>
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<script type="text/javascript">
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function test_activate(t) {
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t.plan(2);
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var strategy = new OpenLayers.Strategy.Cluster();
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t.eq(strategy.active, false, "not active after construction");
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var layer = new OpenLayers.Layer.Vector("Vector Layer", {
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strategies: [strategy]
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});
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var map = new OpenLayers.Map('map');
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map.addLayer(layer);
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t.eq(strategy.active, true, "active after adding to map");
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}
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function test_clusters(t) {
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t.plan(17);
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function featuresEq(got, exp) {
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var eq = false;
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if(got instanceof Array && exp instanceof Array) {
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if(got.length === exp.length) {
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for(var i=0; i<got.length; ++i) {
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if(got[i] !== exp[i]) {
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console.log(got[i], exp[i]);
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break;
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}
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}
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eq = (i == got.length);
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}
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}
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return eq;
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}
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var strategy = new OpenLayers.Strategy.Cluster();
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var layer = new OpenLayers.Layer.Vector("Vector Layer", {
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strategies: [strategy],
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isBaseLayer: true
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});
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var map = new OpenLayers.Map('map', {
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resolutions: [4, 2, 1],
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maxExtent: new OpenLayers.Bounds(-40, -40, 40, 40)
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});
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map.addLayer(layer);
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// create features in a line, 1 unit apart
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var features = new Array(80);
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for(var i=0; i<80; ++i) {
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features[i] = new OpenLayers.Feature.Vector(
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new OpenLayers.Geometry.Point(-40 + i, 0)
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);
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}
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// add one additional feature, with no geometry - just to confirm it doesn't break things
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features.push(new OpenLayers.Feature.Vector());
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layer.addFeatures(features);
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map.setCenter(new OpenLayers.LonLat(0, 0), 0);
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// resolution 4
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// threshold: 4 * 20 = 80 units
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// one cluster
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t.eq(layer.features.length, 1, "[4] layer has one cluster");
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t.ok(featuresEq(layer.features[0].cluster, features.slice(0, 80)), "[4] cluster includes all features with geometries");
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// resolution 2
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// threshold: 2 * 20 = 40 units
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// two clusters (41 and 39) - first cluster includes all features within 40 units of the first (0-40 or 41 features)
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map.zoomIn();
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t.eq(layer.features.length, 2, "[2] layer has two clusters");
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t.ok(featuresEq(layer.features[0].cluster, features.slice(0, 41)), "[2] first cluster includes first 41 features");
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t.ok(featuresEq(layer.features[1].cluster, features.slice(41, 80)), "[2] second cluster includes last 39 features");
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// resolution 1
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// threshold: 1 * 20 = 20 units
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// four clusters (21, 21, 21, and 17)
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map.zoomIn();
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t.eq(layer.features.length, 4, "[1] layer has four clusters");
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t.ok(featuresEq(layer.features[0].cluster, features.slice(0, 21)), "[1] first cluster includes first 21 features");
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t.ok(featuresEq(layer.features[1].cluster, features.slice(21, 42)), "[1] second cluster includes second 21 features");
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t.ok(featuresEq(layer.features[2].cluster, features.slice(42, 63)), "[1] third cluster includes third 21 features");
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t.ok(featuresEq(layer.features[3].cluster, features.slice(63, 80)), "[1] fourth cluster includes last 17 features");
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// zoom out and back in to test threshold property (21)
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map.zoomOut();
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strategy.threshold = 21;
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map.zoomIn();
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t.eq(layer.features.length, 20, "[1-threshold 21] layer has 20 clusters");
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t.ok(featuresEq(layer.features[0].cluster, features.slice(0, 21)), "[1-threshold 21] first cluster includes first 21 features");
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t.ok(featuresEq(layer.features[1].cluster, features.slice(21, 42)), "[1-threshold 21] second cluster includes second 21 features");
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t.ok(featuresEq(layer.features[2].cluster, features.slice(42, 63)), "[1-threshold 21] third cluster includes third 21 features");
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t.ok(featuresEq(layer.features.slice(3, 20), features.slice(63, 80)), "[1-threshold 21] last 17 features are not clustered");
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// zoom out and back in to test high threshold
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map.zoomOut();
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strategy.threshold = 100; // clusters must contain 100 features or more
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map.zoomIn();
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// the one feature with no geometry is not added to the layer
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t.eq(layer.features.length, features.length-1, "[1-threshold 100] layer has " + (features.length-1) + " clusters");
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t.ok(featuresEq(layer.features, features.slice(0, 80)), "[1-threshold 100] layer has all features with geometry");
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}
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function test_deactivate(t) {
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t.plan(2);
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var strategy = new OpenLayers.Strategy.Cluster();
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var layer = new OpenLayers.Layer.Vector("Vector Layer", {
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strategies: [strategy]
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});
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var map = new OpenLayers.Map('map');
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map.addLayer(layer);
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t.eq(strategy.active, true, "active after adding to map");
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map.removeLayer(layer);
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t.eq(strategy.active, false, "not active after removing from map");
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}
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</script>
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</head>
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<body>
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<div id="map" style="width: 400px; height: 200px" />
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</body>
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</html>
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