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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<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>Open Popup on Layer.Vector</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">
#controlToggle li {
list-style: none;
}
</style>
<script src="../lib/OpenLayers.js"></script>
<script type="text/javascript">
var map, drawControls, selectControl, selectedFeature;
function onPopupClose(evt) {
selectControl.unselect(selectedFeature);
}
function onFeatureSelect(feature) {
selectedFeature = feature;
popup = new OpenLayers.Popup.FramedCloud("chicken",
feature.geometry.getBounds().getCenterLonLat(),
null,
"<div style='font-size:.8em'>Feature: " + feature.id +"<br>Area: " + feature.geometry.getArea()+"</div>",
null, true, onPopupClose);
feature.popup = popup;
map.addPopup(popup);
}
function onFeatureUnselect(feature) {
map.removePopup(feature.popup);
feature.popup.destroy();
feature.popup = null;
}
function init(){
map = new OpenLayers.Map('map');
var wmsLayer = new OpenLayers.Layer.WMS( "OpenLayers WMS",
"http://vmap0.tiles.osgeo.org/wms/vmap0?", {layers: 'basic'});
var polygonLayer = new OpenLayers.Layer.Vector("Polygon Layer");
map.addLayers([wmsLayer, polygonLayer]);
map.addControl(new OpenLayers.Control.LayerSwitcher());
map.addControl(new OpenLayers.Control.MousePosition());
selectControl = new OpenLayers.Control.SelectFeature(polygonLayer,
{onSelect: onFeatureSelect, onUnselect: onFeatureUnselect});
drawControls = {
polygon: new OpenLayers.Control.DrawFeature(polygonLayer,
OpenLayers.Handler.Polygon),
select: selectControl
};
for(var key in drawControls) {
map.addControl(drawControls[key]);
}
map.setCenter(new OpenLayers.LonLat(0, 0), 3);
}
function toggleControl(element) {
for(key in drawControls) {
var control = drawControls[key];
if(element.value == key && element.checked) {
control.activate();
} else {
control.deactivate();
}
}
}
</script>
</head>
<body onload="init()">
<h1 id="title">Open Popup on Layer.Vector</h1>
<div id="tags">
vector, feature, selecting, selection, popup
</div>
<p id="shortdesc">
Using a Control.SelectFeature, open a popup on click.
</p>
<div id="map" class="smallmap"></div>
<ul id="controlToggle">
<li>
<input type="radio" name="type" value="none" id="noneToggle"
onclick="toggleControl(this);" checked="checked" />
<label for="noneToggle">navigate</label>
</li>
<li>
<input type="radio" name="type" value="polygon" id="polygonToggle"
onclick="toggleControl(this);" />
<label for="polygonToggle">draw polygon</label>
</li>
<li>
<input type="radio" name="type" value="select" id="selectToggle"
onclick="toggleControl(this);" />
<label for="selectToggle">select polygon on click</label>
</li>
</ul>
<p>It is possible to use the onSelect/onUnselect hooks on the SelectFeature
to do fun things -- like open a popup.
</p>
</body>
</html>
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