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<!DOCTYPE html>
<html>
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<title>OpenLayers Filter Strategy Example</title>
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<h1 id="title">Filter Strategy</h1>
<div id="tags">
filter, strategy, strategies, kml, advanced
</div>
<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>
<script src="filter-strategy.js"></script>
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