Adding paging and cluster strategies. The paging strategy intercepts a batch of features bound for the layer and caches them, giving the layer one page at a time. The cluster strategy intercepts a batch of features and groups proximate features as clusters - giving the clusters to the layer instead. Thanks for the careful review Erik. r=euzuro (see #1606).
git-svn-id: http://svn.openlayers.org/trunk/openlayers@8003 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
Tim Schaub
@@ -0,0 +1,201 @@
|
||||
<html xmlns="http://www.w3.org/1999/xhtml">
|
||||
<head>
|
||||
<title>OpenLayers Cluster Strategy Example</title>
|
||||
<link rel="stylesheet" href="../theme/default/style.css" type="text/css" />
|
||||
<link rel="stylesheet" href="style.css" type="text/css" />
|
||||
<style type="text/css">
|
||||
#photos {
|
||||
height: 100px;
|
||||
width: 512px;
|
||||
position: relative;
|
||||
white-space: nowrap;
|
||||
}
|
||||
.shift {
|
||||
height: 25px;
|
||||
line-height: 25px;
|
||||
background-color: #fefefe;
|
||||
text-align: center;
|
||||
position: absolute;
|
||||
bottom: 10px;
|
||||
font-size: 8px;
|
||||
font-weight: bold;
|
||||
color: #696969;
|
||||
width: 25px;
|
||||
}
|
||||
#scroll-start {
|
||||
left: 0px;
|
||||
}
|
||||
#scroll-end {
|
||||
right: 0px;
|
||||
}
|
||||
#scroll {
|
||||
left: 30px;
|
||||
width: 452px;
|
||||
height: 100px;
|
||||
overflow: hidden;
|
||||
position: absolute;
|
||||
bottom: 0px;
|
||||
}
|
||||
#photos ul {
|
||||
position: absolute;
|
||||
bottom: 0px;
|
||||
padding: 0;
|
||||
margin: 0;
|
||||
}
|
||||
#photos ul.start {
|
||||
left: 0px;
|
||||
}
|
||||
#photos ul.end {
|
||||
right: 80px;
|
||||
}
|
||||
#photos ul li {
|
||||
padding 10px;
|
||||
margin: 0;
|
||||
list-style: none;
|
||||
display: inline;
|
||||
}
|
||||
img.thumb {
|
||||
height: 30px;
|
||||
}
|
||||
img.big {
|
||||
height: 90px;
|
||||
}
|
||||
</style>
|
||||
<script src="../lib/OpenLayers.js"></script>
|
||||
<script src="Jugl.js"></script>
|
||||
<script src="animator.js"></script>
|
||||
<script type="text/javascript">
|
||||
var map, template;
|
||||
var Jugl = window["http://jugl.tschaub.net/trunk/lib/Jugl.js"];
|
||||
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("OpenLayers WMS",
|
||||
["http://t3.labs.metacarta.com/wms-c/Basic.py",
|
||||
"http://t2.labs.metacarta.com/wms-c/Basic.py",
|
||||
"http://t1.labs.metacarta.com/wms-c/Basic.py"],
|
||||
{layers: 'satellite'}
|
||||
);
|
||||
|
||||
var style = new OpenLayers.Style({
|
||||
pointRadius: "${radius}",
|
||||
fillColor: "#ffcc66",
|
||||
fillOpacity: 0.8,
|
||||
strokeColor: "#cc6633",
|
||||
strokeWidth: 2,
|
||||
strokeOpacity: 0.8
|
||||
}, {
|
||||
context: {
|
||||
radius: function(feature) {
|
||||
return Math.min(feature.attributes.count, 7) + 3;
|
||||
}
|
||||
}
|
||||
});
|
||||
|
||||
var photos = new OpenLayers.Layer.Vector("Photos", {
|
||||
strategies: [
|
||||
new OpenLayers.Strategy.Fixed(),
|
||||
new OpenLayers.Strategy.Cluster()
|
||||
],
|
||||
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: 150,
|
||||
bbox: [-180, -90, 180, 90]
|
||||
},
|
||||
format: new OpenLayers.Format.GML()
|
||||
}),
|
||||
styleMap: new OpenLayers.StyleMap({
|
||||
"default": style,
|
||||
"select": {
|
||||
fillColor: "#8aeeef",
|
||||
strokeColor: "#32a8a9"
|
||||
}
|
||||
})
|
||||
});
|
||||
|
||||
var select = new OpenLayers.Control.SelectFeature(
|
||||
photos, {hover: true}
|
||||
);
|
||||
map.addControl(select);
|
||||
select.activate();
|
||||
photos.events.on({"featureselected": display});
|
||||
|
||||
map.addLayers([base, photos]);
|
||||
map.setCenter(new OpenLayers.LonLat(0, 0), 1);
|
||||
|
||||
// template setup
|
||||
template = new Jugl.Template("template");
|
||||
|
||||
}
|
||||
|
||||
function display(event) {
|
||||
// clear previous photo list and create new one
|
||||
$("photos").innerHTML = "";
|
||||
var node = template.process({
|
||||
context: {features: event.feature.cluster},
|
||||
clone: true,
|
||||
parent: $("photos")
|
||||
});
|
||||
// set up forward/rewind
|
||||
var forward = Animator.apply($("list"), ["start", "end"], {duration: 1500});
|
||||
$("scroll-end").onmouseover = function() {forward.seekTo(1)};
|
||||
$("scroll-end").onmouseout = function() {forward.seekTo(forward.state)};
|
||||
$("scroll-start").onmouseover = function() {forward.seekTo(0)};
|
||||
$("scroll-start").onmouseout = function() {forward.seekTo(forward.state)};
|
||||
// set up photo zoom
|
||||
for(var i=0; i<event.feature.cluster.length; ++i) {
|
||||
listen($("link-" + i), Animator.apply($("photo-" + i), ["thumb", "big"]));
|
||||
}
|
||||
}
|
||||
|
||||
function listen(el, anim) {
|
||||
el.onmouseover = function() {anim.seekTo(1)};
|
||||
el.onmouseout = function() {anim.seekTo(0)};
|
||||
}
|
||||
|
||||
</script>
|
||||
</head>
|
||||
<body onload="init()">
|
||||
<h1 id="title">Cluster Strategy Example</h1>
|
||||
<p id="shortdesc">
|
||||
Uses a cluster strategy to render points representing clusters of features.
|
||||
</p>
|
||||
<div id="map" class="smallmap"></div>
|
||||
<div id="docs">
|
||||
<p>The Cluster strategy lets you display points representing clusters
|
||||
of features within some pixel distance.</p>
|
||||
</div>
|
||||
<div id="photos"></div>
|
||||
<p>Hover over a cluster on the map to see the photos it includes.</p>
|
||||
<div style="display: none;">
|
||||
<div id="template">
|
||||
<div class="shift" id="scroll-start"><<</div>
|
||||
<div id="scroll">
|
||||
<ul id="list" class="start">
|
||||
<li jugl:repeat="feature features">
|
||||
<a jugl:attributes="href feature.attributes.img_url;
|
||||
id 'link-' + repeat.feature.index"
|
||||
target="_blank">
|
||||
<img jugl:attributes="src feature.attributes.img_url;
|
||||
title feature.attributes.title;
|
||||
id 'photo-' + repeat.feature.index"
|
||||
class="thumb" />
|
||||
</a>
|
||||
</li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="shift" id="scroll-end">>></div>
|
||||
</div>
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
Reference in New Issue
Block a user