[OpenLayers-Users] problem using pointRadius computed in context

[sylvie fiat]

Hi,

Thanks for your reply, what I had for the radius value was ${radius} just like in the exemple.

I figured out that my problem was not in the radius definition itself but in the layer definition, first my style definition was at the wrong place then I had to define the styleMap out of the vector and my style out of the styleMap and it worked :

var myStyle = new OpenLayers.Style( {
    pointRadius :"${radius}",
    fillColor :defaultFillColor,
    fillOpacity :defaultOpacity,
    strokeColor :defaultStrokeColor,
    strokeWidth :defaultStrokeWidth,
    strokeOpacity :defaultStrokeOpacity
}, {
    context : {
        radius: function(feature) {
            return Math.min(feature.attributes.count, 7) + 3;
        }
    }
});
:

var myStyleMap = new OpenLayers.StyleMap( {
    "default" :myStyle
});

new OpenLayers.Layer.Vector(layerStationsName,
             {
        strategies: [
             new OpenLayers.Strategy.Fixed(),
             new OpenLayers.Strategy.Cluster()                 
        ],
        protocol: new OpenLayers.Protocol.HTTP({
             url: geoserverUrl+ "/wfs",
             params: {
                  format: SERVICE_WFS,
                  service: SERVICE_WFS,
                  request: REQUEST_WFS,
                  srs: defaultProjection,                            
                  VERSION : VERSION,
                  typename : myLayer,
                  useBbox: true,
                  bbox: bounds.toBBOX()
             },
             format: new OpenLayers.Format.GML()                       
        }),
        styleMap: myStyleMap
   });

It all work perfectly now, exept from some troubles with IE but that's another thing..

Sylvie

> Subject: RE: [OpenLayers-Users] problem using pointRadius computed in	context
> Date: Mon, 16 Mar 2009 08:57:56 -0400
> From: CHRISTOPHER.M.HEIDT at saic.com
> To: lists at dipole-consulting.com; kiki__fiat at hotmail.com
> CC: users at openlayers.org
> 
> I don't see what you had before but this wont work because
> pointRadius has to be a number, not a function.
> You can use a function to create the number:
> 
> //Styles
> 	var clusterStyle = new OpenLayers.Style({
>             pointRadius: "${radius}",
>             fillColor: '#ee9900',
>             fillOpacity: 0.8,
>             strokeColor: '#ee9900',
>             strokeWidth: 1,
>             strokeOpacity: 0.8,
> 		cursor: 'pointer'
>         }, {
>             context: {
>                 radius: function(feature) {
> 	
> if(typeof(feature.attributes.count) != 'undefined')
> 					{
> 						return
> Math.min(feature.attributes.count, 7) + 3;
> 					}
> 					return 4;
>                 }
>             }
>         }); 
> 
> -----Original Message-----
> From: users-bounces at openlayers.org [mailto:users-bounces at openlayers.org]
> On Behalf Of Didrik Pinte
> Sent: Monday, March 16, 2009 6:52 AM
> To: sylvie fiat
> Cc: users at openlayers.org
> Subject: Re: [OpenLayers-Users] problem using pointRadius computed in
> context
> 
> On Sun, 2009-03-08 at 23:12 -0700, sylvie fiat wrote:
> > Hi,
> > 
> > I have the same problem and it's taking me hours, did you figure out 
> > what was the problem ?
> > I have tried : 
> > styleMap: new OpenLayers.StyleMap(OpenLayers.Util.applyDefaults(
> > 		        	        {	pointRadius:
> function(feature){return
> > Math.min(feature.attributes.count, 7) + 3;},
> > 		        	        	fillColor: "blue", 
> > 		        	        	fillOpacity: 0.5, 
> > 		        	        	strokeColor: "black"},
> >
> OpenLayers.Feature.Vector.style["default"]))
> > 
> > But I got the error:
> > unexpected value function (feature) { return 
> > Math.min(feature.attributes.count, 7) + 3; } parsing r attribute.
> > 
> > Thanks for any help.
> > Sylvie
> 
> Hi Sylvie,
> 
> I guess it was related to some errors in my javascript file. I would
> suggest you to use online javascriptlint to check your syntax and
> identify potential errors. 
> 
> Didrik

_________________________________________________________________
Téléphonez gratuitement à tous vos proches avec Windows Live Messenger  !  Téléchargez-le maintenant ! 
http://www.windowslive.fr/messenger/1.asp
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/openlayers-users/attachments/20090317/03f91cdf/attachment.html