Hi Alessio,
You can define a style and, depending a context, assign different value.
Here is an example that change the fillcolor of feature depending on the attribute "state" of each feature.
Note that the context is automatically applied to features. Nothing to activate ;)
new OpenLayers.Style({
strokeColor: "${getFillColor}",
fillColor: "${getFillColor}",
strokeWidth: 2,
strokeOpacity: 1,
fillOpacity: 0.7,
pointRadius: 5
},{
context: {
getFillColor:function(feature) {
// Green if state is true
if (feature.attributes.state == true)
return '#00FF00';
// Red if state is false
else if (feature.attributes.state == false)
return '#FF0000';
}
}
})
AlessioDL wrote:
Hi,
I have this WFS layer from my UMN-Mapserver
//Vector layer style
var area_style = OpenLayers.Util.extend({}, OpenLayers.Feature.Vector.style['default']);
area_style.strokeWidth = 1.5;
area_style.strokeColor = "#ff0000";
area_style.fillOpacity = 0.75;
//Layer definition
qAreas = new OpenLayers.Layer.Vector("WFS",
{
strategies: [new OpenLayers.Strategy.BBOX()],
filter: propertyFilter,
style:area_style,
protocol: new OpenLayers.Protocol.WFS({
url: wfsURL,
extractAttributes:true,
featureType: "QueryAreas",
geometryName:"the_geom"
})
});
I'd like to use an attribute value to style things differently
(for example, if the value of the attribute named type is "A" the corresponding polygons bacame red and if it is "B" they became blue)
Can you help me? :-)
