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Add example, and use getFeatures in other examples

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The new dedicated getfeatureinfo example shows how to combine
feature info from a WMS and a vector layer. The other examples
that previously used getFeatureInfo from vector layers now use
the more appropriate getFeatures.
This commit is contained in:
ahocevar
2013-07-31 17:47:16 +02:00
parent 4dd148a731
commit 5acff857e7
6 changed files with 146 additions and 31 deletions
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61
examples/getfeatureinfo.html Normal file
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@@ -0,0 +1,61 @@
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="chrome=1">
<meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
<link rel="stylesheet" href="../css/ol.css" type="text/css">
<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap.min.css" type="text/css">
<link rel="stylesheet" href="../resources/layout.css" type="text/css">
<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap-responsive.min.css" type="text/css">
<title>Vector layer example</title>
</head>
<body>
<div class="navbar navbar-inverse navbar-fixed-top">
<div class="navbar-inner">
<div class="container">
<a class="brand" href="./">OpenLayers 3 Examples</a>
<ul class="nav pull-right">
<li><iframe class="github-watch-button" src="http://ghbtns.com/github-btn.html?user=openlayers&repo=ol3&type=watch&count=true"
allowtransparency="true" frameborder="0" scrolling="0" height="20" width="90"></iframe></li>
<li><a href="https://twitter.com/share" class="twitter-share-button" data-count="none" data-hashtags="openlayers">&nbsp;</a></li>
<li><div class="g-plusone-wrapper"><div class="g-plusone" data-size="medium" data-annotation="none"></div></div></li>
</ul>
</div>
</div>
</div>
<div class="container-fluid">
<div class="row-fluid">
<div class="span12">
<div id="map" class="map"></div>
</div>
</div>
<div class="row-fluid">
<div class="span4">
<h4 id="title">GetFeatureInfo example</h4>
<p id="shortdesc">Example of a WMS layer and a vector layer, both configured to provide feature information on click.</p>
<div id="docs">
<p>See the <a href="getfeatureinfo.js" target="_blank">getfeatureinfo.js source</a> to see how this is done.</p>
</div>
<div id="tags">getfeatureinfo</div>
</div>
<div class="span4 offset4">
<div id="info" class="alert alert-success">
&nbsp;
</div>
</div>
</div>
</div>
<script src="loader.js?id=getfeatureinfo" type="text/javascript"></script>
<script src="../resources/social-links.js" type="text/javascript"></script>
</body>
</html>

59
examples/getfeatureinfo.js Normal file
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@@ -0,0 +1,59 @@
goog.require('ol.Map');
goog.require('ol.RendererHint');
goog.require('ol.View2D');
goog.require('ol.expr');
goog.require('ol.layer.TileLayer');
goog.require('ol.layer.Vector');
goog.require('ol.parser.GeoJSON');
goog.require('ol.source.TiledWMS');
goog.require('ol.source.Vector');
goog.require('ol.style.Polygon');
goog.require('ol.style.Rule');
goog.require('ol.style.Style');
var wms = new ol.layer.TileLayer({
source: new ol.source.TiledWMS({
url: 'http://demo.opengeo.org/geoserver/wms',
params: {'LAYERS': 'ne:ne'}
})
});
var vector = new ol.layer.Vector({
source: new ol.source.Vector({
parser: new ol.parser.GeoJSON(),
url: 'data/countries.geojson'
}),
style: new ol.style.Style({rules: [
new ol.style.Rule({
symbolizers: [
new ol.style.Polygon({
strokeColor: '#bada55'
})
]
})
]}),
transformFeatureInfo: function(features) {
return features.length > 0 ?
features[0].getFeatureId() + ': ' + features[0].get('name') : '&nbsp;';
}
});
var map = new ol.Map({
layers: [wms, vector],
renderer: ol.RendererHint.CANVAS,
target: 'map',
view: new ol.View2D({
center: [0, 0],
zoom: 1
})
});
map.on(['click'], function(evt) {
map.getFeatureInfo({
pixel: evt.getPixel(),
success: function(featureInfoByLayer) {
document.getElementById('info').innerHTML = featureInfoByLayer.join('');
}
});
});

20
examples/gpx.js
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@@ -15,14 +15,7 @@ var vector = new ol.layer.Vector({
source: new ol.source.Vector({ source: new ol.source.Vector({
parser: new ol.parser.GPX(), parser: new ol.parser.GPX(),
url: 'data/gpx/yahoo.xml' url: 'data/gpx/yahoo.xml'
}), })
transformFeatureInfo: function(features) {
var info = [];
for (var i = 0, ii = features.length; i < ii; ++i) {
info.push(features[i].get('name') + ': ' + features[i].get('type'));
}
return info.join(', ');
}
}); });
var map = new ol.Map({ var map = new ol.Map({
@@ -36,11 +29,16 @@ var map = new ol.Map({
}); });
map.on(['click', 'mousemove'], function(evt) { map.on(['click', 'mousemove'], function(evt) {
map.getFeatureInfo({ map.getFeatures({
pixel: evt.getPixel(), pixel: evt.getPixel(),
layers: [vector], layers: [vector],
success: function(featureInfo) { success: function(featuresByLayer) {
document.getElementById('info').innerHTML = featureInfo[0] || '&nbsp;'; var features = featuresByLayer[0];
var info = [];
for (var i = 0, ii = features.length; i < ii; ++i) {
info.push(features[i].get('name') + ': ' + features[i].get('type'));
}
document.getElementById('info').innerHTML = info.join(', ') || '&nbsp;';
} }
}); });
}); });

20
examples/kml.js
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@@ -25,14 +25,7 @@ var vector = new ol.layer.Vector({
maxDepth: 1, dimension: 2, extractStyles: true, extractAttributes: true maxDepth: 1, dimension: 2, extractStyles: true, extractAttributes: true
}), }),
url: 'data/kml/lines.kml' url: 'data/kml/lines.kml'
}), })
transformFeatureInfo: function(features) {
var info = [];
for (var i = 0, ii = features.length; i < ii; ++i) {
info.push(features[i].get('name'));
}
return info.join(', ');
}
}); });
var map = new ol.Map({ var map = new ol.Map({
@@ -47,11 +40,16 @@ var map = new ol.Map({
}); });
map.on(['click', 'mousemove'], function(evt) { map.on(['click', 'mousemove'], function(evt) {
map.getFeatureInfo({ map.getFeatures({
pixel: evt.getPixel(), pixel: evt.getPixel(),
layers: [vector], layers: [vector],
success: function(featureInfo) { success: function(featuresByLayer) {
document.getElementById('info').innerHTML = featureInfo[0] || '&nbsp'; var features = featuresByLayer[0];
var info = [];
for (var i = 0, ii = features.length; i < ii; ++i) {
info.push(features[i].get('name'));
}
document.getElementById('info').innerHTML = info.join(', ') || '&nbsp';
} }
}); });
}); });

15
examples/vector-layer.js
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@@ -46,11 +46,7 @@ var vector = new ol.layer.Vector({
}) })
] ]
}) })
]}), ]})
transformFeatureInfo: function(features) {
return features.length > 0 ?
features[0].getFeatureId() + ': ' + features[0].get('name') : '&nbsp;';
}
}); });
var map = new ol.Map({ var map = new ol.Map({
@@ -64,11 +60,14 @@ var map = new ol.Map({
}); });
map.on(['click', 'mousemove'], function(evt) { map.on(['click', 'mousemove'], function(evt) {
map.getFeatureInfo({ map.getFeatures({
pixel: evt.getPixel(), pixel: evt.getPixel(),
layers: [vector], layers: [vector],
success: function(featureInfo) { success: function(featuresByLayer) {
document.getElementById('info').innerHTML = featureInfo[0]; var features = featuresByLayer[0];
document.getElementById('info').innerHTML = features.length > 0 ?
features[0].getFeatureId() + ': ' + features[0].get('name') :
'&nbsp;';
} }
}); });
}); });

2
src/ol/source/wmssource.js
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@@ -87,7 +87,7 @@ ol.source.wms.getFeatureInfo = function(url, options, success, opt_error) {
.replace(/LAYERS=([^&]+)/, 'LAYERS=$1&QUERY_LAYERS=$1'); .replace(/LAYERS=([^&]+)/, 'LAYERS=$1&QUERY_LAYERS=$1');
if (options.method == ol.source.WMSGetFeatureInfoMethod.IFRAME) { if (options.method == ol.source.WMSGetFeatureInfoMethod.IFRAME) {
goog.global.setTimeout(function() { goog.global.setTimeout(function() {
success('<iframe seamless src="' + url + '"></iframe'); success('<iframe seamless src="' + url + '"></iframe>');
}, 0); }, 0);
} else if (options.method == ol.source.WMSGetFeatureInfoMethod.XHR_GET) { } else if (options.method == ol.source.WMSGetFeatureInfoMethod.XHR_GET) {
goog.net.XhrIo.send(url, function(event) { goog.net.XhrIo.send(url, function(event) {