[OpenLayers-Users] Error when cumputing attribute value in context
for WFS styling
Zer
zer_matt at hotmail.com
Thu Feb 18 13:05:00 EST 2010
Hi,
I'm also fighting with this problem.
I stared out with this code:
var myStyle = new OpenLayers.Style( {
pointRadius :"${radius}",
fillColor :'#FFFF00',
fillOpacity :0.5,
strokeColor :'#FFFFFF',
strokeWidth :2,
strokeOpacity :0.5
}, {
context : {
radius: function(feature) {
return Math.min(feature.attributes.radius, 7) +
3;;
}
}
});
var myStyleMap = new OpenLayers.StyleMap( {
"default" :myStyle
});
var wfsSurvey = new OpenLayers.Layer.Vector("Points", {
styleMap: myStyleMap,
strategies: [new OpenLayers.Strategy.BBOX()],
projection: new OpenLayers.Projection("EPSG:4326"),
protocol: new OpenLayers.Protocol.WFS({
version: "1.1.0",
srsName: "EPSG:4326",
url: "http://localhost:8080/geoserver/wfs",
extractAttributes: true,
featureNS : "http://www.px.org",
featureType: "antenna",
geometryName: "the_geom",
schema:
"http://localhost:8080/geoserver/wfs/DescribeFeatureType?version=1.1.0&
typename=px:antenna"
})
});
If I skip the attribute based styling, the points show up correctly. But as
soon as I try using the radius, points will not show on the map. Or they
will show, but with radius = 0. It seems like the value for the attributes
always will be zero and I get the error "Unexpected value parsing r
attribute." in the Firebug console.
Struggling with this all day, I decided to copy some of the code from the
OpenLayers Examples, to see if it works or not. It did not work....
I am using the exact same code as in the OpenLayers StyleMap Example. If I
run the example from the url http://openlayers.org/dev/examples/ , it works
just fine. But when I runt it from my local site,
http://localhost:8080/px/mapjsp, I get the error "Unexpected value parsing r
attribute." in the Firebug console.
I'm using OpenLayers 2.8 and have tried the code in FF 3.0. FF3.5 and IE 7
with the same negative result. I've checked the GML that's returned from
then WFS-service and everything looks OK.
I've totally run out of ideas.... Anyone? Suggestions will be highly
appreciable!
Thanks,
ZM
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