5fd5085eba
git-svn-id: http://svn.openlayers.org/trunk/openlayers@9779 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
91 lines
3.9 KiB
HTML
91 lines
3.9 KiB
HTML
<html xmlns="http://www.w3.org/1999/xhtml">
|
|
<head>
|
|
<title>OpenLayers Vector Behavior 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;
|
|
|
|
function init(){
|
|
map = new OpenLayers.Map('map');
|
|
var wms = new OpenLayers.Layer.WMS(
|
|
"OpenLayers WMS", "http://labs.metacarta.com/wms/vmap0",
|
|
{layers: 'basic'}
|
|
);
|
|
|
|
var layer = new OpenLayers.Layer.Vector("POIs", {
|
|
strategies: [new OpenLayers.Strategy.BBOX({resFactor: 1.1})],
|
|
protocol: new OpenLayers.Protocol.HTTP({
|
|
url: "textfile.txt",
|
|
format: new OpenLayers.Format.Text()
|
|
})
|
|
});
|
|
|
|
map.addLayers([wms, layer]);
|
|
map.zoomToMaxExtent();
|
|
|
|
// Interaction; not needed for initial display.
|
|
selectControl = new OpenLayers.Control.SelectFeature(layer);
|
|
map.addControl(selectControl);
|
|
selectControl.activate();
|
|
layer.events.on({
|
|
'featureselected': onFeatureSelect,
|
|
'featureunselected': onFeatureUnselect
|
|
});
|
|
}
|
|
|
|
|
|
// Needed only for interaction, not for the display.
|
|
function onPopupClose(evt) {
|
|
// 'this' is the popup.
|
|
selectControl.unselect(this.feature);
|
|
}
|
|
function onFeatureSelect(evt) {
|
|
feature = evt.feature;
|
|
popup = new OpenLayers.Popup.FramedCloud("featurePopup",
|
|
feature.geometry.getBounds().getCenterLonLat(),
|
|
new OpenLayers.Size(100,100),
|
|
"<h2>"+feature.attributes.title + "</h2>" +
|
|
feature.attributes.description,
|
|
null, true, onPopupClose);
|
|
feature.popup = popup;
|
|
popup.feature = feature;
|
|
map.addPopup(popup);
|
|
}
|
|
function onFeatureUnselect(evt) {
|
|
feature = evt.feature;
|
|
if (feature.popup) {
|
|
popup.feature = null;
|
|
map.removePopup(feature.popup);
|
|
feature.popup.destroy();
|
|
feature.popup = null;
|
|
}
|
|
}
|
|
</script>
|
|
</head>
|
|
<body onload="init()">
|
|
<h1 id="title">Dynamic POIs via a Text Layer</h1>
|
|
<p id="shortdesc">
|
|
Loading dynamic data from a text file.
|
|
</p>
|
|
<div id="map" class="smallmap"></div>
|
|
<div id="docs">
|
|
The vector layer shown uses the BBOX strategy, the HTTP protocol,
|
|
and the Text format.
|
|
This setup appends "?bbox=west,south,east,north" to every
|
|
request. This allows you to configure the location as something
|
|
like 'textfile.php', and take the '?bbox=' parameter to select
|
|
data from a database or the like.
|
|
<br /><br />
|
|
There is nothing about this example that limits it to text files;
|
|
you can do the same thing with KML, GeoJSON, etc.
|
|
<br /><br />
|
|
This is an alternative to something like the <a href="http://wiki.openstreetmap.org/index.php/OpenLayers_Dynamic_POI">OpenStreetMap "Dynamic POI"</a> example. The Layer is a standard vector layer, and interaction can be
|
|
configured via the SelectFeature control, as you can see in the
|
|
latter half of the code, which allows you to open a popup when
|
|
a feature is selected.
|
|
</div>
|
|
</body>
|
|
</html>
|