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<pre wrap="">This is a bit tricky, as the wms server sends a response independent of wether it found any features or not.
A simple solution could be to check the response text for a string you know is only present if there are indeed results. (ie. geoserver adds
<code class="wrappedText focusRow" role="listitem"><table class="featureInfo"> if there are results). This can be done with someting like:
</code>
info = new OpenLayers.Control.WMSGetFeatureInfo({
url: '<a class="moz-txt-link-freetext" href="http://webgis.24gis.pl/geoserver/wms">http://webgis.24gis.pl/geoserver/wms</a>',
title: 'Identify features by clicking',
queryVisible: true,
infoFormat: 'text/html',
maxFeatures: 1,
eventListeners: {
getfeatureinfo: function(event) {
if (event.text.indexOf("<table class=\"featureInfo\">") != -1){
popup = new OpenLayers.Popup.FramedCloud(
"chicken",
map.getLonLatFromPixel(event.xy),
null,
event.text,
null,
true
), {
autoSize: false,
maxSize: new OpenLayers.Size(5,5)
};
map.addPopup(popup);
}
}
}
});
map.addControl(info);</pre>
<br>
<br>
On 2011-08-03 13:22, michsred wrote:
<blockquote cite="mid:1312370523686-6648352.post@n2.nabble.com"
type="cite">
<pre wrap="">Hi list,
is it possible to construct GetFeatureInfo machanism with popup which will
be active only on objects (points, lines, polygons) from WMS layers. I
already have popups working on my whole map. When I click outside of object
e.g polygon the opened popup is empty. I would like to have popups which
apear only on objects (or more precisely, only on places where
GetFeatureInfo information is present).
This is GetFeatureInfo code which I use:
info = new OpenLayers.Control.WMSGetFeatureInfo({
url: '<a class="moz-txt-link-freetext" href="http://webgis.24gis.pl/geoserver/wms">http://webgis.24gis.pl/geoserver/wms</a>',
title: 'Identify features by clicking',
queryVisible: true,
infoFormat: 'text/html',
maxFeatures: 1,
eventListeners: {
getfeatureinfo: function(event) {
popup = new OpenLayers.Popup.FramedCloud(
"chicken",
map.getLonLatFromPixel(event.xy),
null,
event.text,
null,
true
), {
autoSize: false,
maxSize: new OpenLayers.Size(5,5)
};
map.addPopup(popup);
}
}
});
map.addControl(info);
Thank you in advance for any sugestion!
Michal
--
View this message in context: <a class="moz-txt-link-freetext" href="http://osgeo-org.1803224.n2.nabble.com/Popup-only-on-WMS-layer-object-tp6648352p6648352.html">http://osgeo-org.1803224.n2.nabble.com/Popup-only-on-WMS-layer-object-tp6648352p6648352.html</a>
Sent from the OpenLayers Users mailing list archive at Nabble.com.
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</pre>
</blockquote>
<br>
<br>
<pre class="moz-signature" cols="72">--
Atle Frenvik Sveen
Utvikler
Geomatikk IKT AS
tlf: 45 27 86 89
<a class="moz-txt-link-abbreviated" href="mailto:atle.frenvik.sveen@geomatikk.no">atle.frenvik.sveen@geomatikk.no</a></pre>
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