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Adding a filter strategy for limiting features that are included in a layer's collection. The strategy takes a filter and caches features that don't pass the filter. Call setFilter on the strategy to update the cache and collection on the layer. r=ahocevar (closes #2790)

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git-svn-id: http://svn.openlayers.org/trunk/openlayers@10655 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
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Tim Schaub
2010-08-20 22:41:01 +00:00
parent 28558c171c
commit 25fac24436
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examples/filter-strategy.html
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<!DOCTYPE html>
<html>
<head>
<title>OpenLayers Filter Strategy Example</title>
<link rel="stylesheet" href="../theme/default/style.css" type="text/css">
<link rel="stylesheet" href="../theme/default/google.css" type="text/css">
<link rel="stylesheet" href="style.css" type="text/css">
<script src="../lib/OpenLayers.js"></script>
<script>OpenLayers.ImgPath = "../img/";</script>
<script src="filter-strategy.js"></script>
<style>
.olControlAttribution {
font-size: 9px;
bottom: 2px;
}
</style>
</head>
<body onload="init()">
<h1 id="title">Filter Strategy</h1>
<p id="shortdesc">
Demonstrates the filter strategy for limiting features passed to the layer.
</p>
<div id="map" class="smallmap"></div>
<label for="span">time span (seconds)</label>
<select id="span" name="span">
<option value="15">15</option>
<option value="30">30</option>
<option value="60" selected>60</option>
<option value="120">120</option>
<option value="240">240</option>
</select>
<input type="button" id="start" value="start">
<input type="button" id="stop" value="stop"><br><br>
<div id="docs">
<p>
This example uses a filter strategy to limit the features that are passed
to a layer. Features bound for this layer have a <code>when</code> attribute
with date values. A filter strategy is constructed with a between filter
that limits the span of dates shown. A simple animation cycles through
the domain of the <code>when</code> values, calling <code>setFilter</code>
on the strategy with an updated filter.
</p><p>
View the <a href="filter-strategy.js" target="_blank">filter-strategy.js</a>
source to see how this is done
</p>
</div>
</body>
</html>