7f34868fe2
git-svn-id: http://svn.openlayers.org/trunk/openlayers@11158 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
85 lines
3.9 KiB
HTML
85 lines
3.9 KiB
HTML
<html xmlns="http://www.w3.org/1999/xhtml">
|
|
<head>
|
|
<meta name="viewport" content="width=device-width; initial-scale=1.0; maximum-scale=1.0; user-scalable=0;" />
|
|
<meta name="apple-mobile-web-app-capable" content="yes" />
|
|
<title>OpenLayers Paging Strategy Example</title>
|
|
<link rel="stylesheet" href="../theme/default/style.css" type="text/css" />
|
|
<link rel="stylesheet" href="style.css" type="text/css" />
|
|
<script src="../lib/OpenLayers.js"></script>
|
|
<script type="text/javascript">
|
|
var map, photos, paging;
|
|
OpenLayers.ProxyHost = (window.location.host == "localhost") ?
|
|
"/cgi-bin/proxy.cgi?url=" : "proxy.cgi?url=";
|
|
|
|
function init() {
|
|
map = new OpenLayers.Map('map', {
|
|
restrictedExtent: new OpenLayers.Bounds(-180, -90, 180, 90)
|
|
});
|
|
var base = new OpenLayers.Layer.WMS("Imagery",
|
|
["http://t1.hypercube.telascience.org/tiles?",
|
|
"http://t2.hypercube.telascience.org/tiles?",
|
|
"http://t3.hypercube.telascience.org/tiles?",
|
|
"http://t4.hypercube.telascience.org/tiles?"],
|
|
{layers: 'landsat7'}
|
|
);
|
|
|
|
var style = new OpenLayers.Style({
|
|
externalGraphic: "${img_url}",
|
|
pointRadius: 30
|
|
});
|
|
|
|
paging = new OpenLayers.Strategy.Paging();
|
|
|
|
photos = new OpenLayers.Layer.Vector("Photos", {
|
|
strategies: [new OpenLayers.Strategy.Fixed(), paging],
|
|
protocol: new OpenLayers.Protocol.HTTP({
|
|
url: "http://labs.metacarta.com/flickrbrowse/flickr.py/flickr",
|
|
params: {
|
|
format: "WFS",
|
|
sort: "interestingness-desc",
|
|
service: "WFS",
|
|
request: "GetFeatures",
|
|
srs: "EPSG:4326",
|
|
maxfeatures: 100,
|
|
bbox: [-180, -90, 180, 90]
|
|
},
|
|
format: new OpenLayers.Format.GML()
|
|
}),
|
|
styleMap: new OpenLayers.StyleMap(style)
|
|
});
|
|
|
|
map.addLayers([base, photos]);
|
|
photos.events.on({"featuresadded": updateButtons});
|
|
map.setCenter(new OpenLayers.LonLat(0, 0), 1);
|
|
}
|
|
|
|
function updateButtons() {
|
|
document.getElementById("prev").disabled = (paging.pageNum() < 1);
|
|
document.getElementById("next").disabled = (paging.pageNum() >= paging.pageCount() - 1);
|
|
document.getElementById("num").innerHTML = paging.pageNum() + 1;
|
|
document.getElementById("count").innerHTML = paging.pageCount();
|
|
}
|
|
</script>
|
|
</head>
|
|
<body onload="init()">
|
|
<h1 id="title">Paging Strategy Example</h1>
|
|
<div id="tags">
|
|
vector, feature, stylemap, wfs, paging, strategy, cleanup
|
|
</div>
|
|
<p id="shortdesc">
|
|
Uses a paging strategy to cache large batches of features and render a page at a time.
|
|
</p>
|
|
<div id="map" class="smallmap"></div>
|
|
Displaying page <span id="num">0</span> of <span id="count">...</span>
|
|
<button id="prev" disabled="disabled" onclick="paging.pagePrevious();">previous</button>
|
|
<button id="next" disabled="disabled" onclick="paging.pageNext();">next</button>
|
|
<br /><br />
|
|
<div id="docs">
|
|
<p>The Paging strategy lets you apply client side paging for protocols
|
|
that do not support paging on the server. In this case, the protocol requests a
|
|
batch of 100 features, the strategy caches those and supplies a single
|
|
page at a time to the layer.</p>
|
|
</div>
|
|
</body>
|
|
</html>
|