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Commit a change to the Strategy/Fixed to behave more like GeoRSS/Text/GML

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layers, and not load by default if the layer is not visible. Includes tests.
Default Behavior can be changed with 
'OpenLayers.Strategy.Fixed.prototype.preload=true;'. With review from elemoine,
comments from tschaub, review from me. Patch by Edgemaster. (Closes #1852) 


git-svn-id: http://svn.openlayers.org/trunk/openlayers@8775 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
crschmidt
2009-01-28 01:43:04 +00:00
parent be82c1ef6e
commit 256f027c7c
2 changed files with 71 additions and 16 deletions
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tests/Strategy/Fixed.html
+39 -10
View File
@@ -4,26 +4,55 @@
<script type="text/javascript">
function test_activate(t) {
t.plan(1);
t.plan(5);
var featureList = ['foo', 'bar'];
// a fake protocol
var protocol = {
read: function(options) {
options.callback.call(options.scope, {features: featureList});
}
};
var layer = new OpenLayers.Layer.Vector("Vector Layer", {
strategies: [new OpenLayers.Strategy.Fixed()],
// a fake protocol
protocol: {
read: function(options) {
options.callback.call(options.scope, {features: featureList});
}
},
protocol: protocol,
addFeatures: function(features) {
t.eq(features, featureList, "Features added to the layer");
}
});
var layerp = new OpenLayers.Layer.Vector("Hidden preload Layer", {
strategies: [new OpenLayers.Strategy.Fixed({preload:true})],
protocol: protocol,
visibility: false,
addFeatures: function(features) {
t.ok(!this.visibility, "Features preloaded before visible");
}
});
var s = new OpenLayers.Strategy.Fixed();
var layer2 = new OpenLayers.Layer.Vector("Hidden lazyload Layer", {
strategies: [s],
protocol: protocol,
visibility: false,
addFeatures: function(features) {
t.ok(this.visibility, "Layer visible when features added");
}
});
var map = new OpenLayers.Map('map');
map.addLayer(layer);
map.addLayers([layer, layerp, layer2]);
t.ok(layer2.events.listeners["visibilitychanged"][0].obj == s &&
layer2.events.listeners["visibilitychanged"][0].func == s.load,
"activate registers visibilitychanged listener if layer hidden"+
" and is lazyloading");
layer2.setVisibility(true);
t.ok(layer2.events.listeners["visibilitychanged"] == false,
"visibilitychanged listener unregistered");
}
</script>