[OpenLayers-Users] Clustering and addFeatures method

[arno974]

Ahh okay i understand what you want.

With the OpenLayers.Strategy.Cluster you can only  merge the features when
they are close to each other. In your example, the two points have been
merge into only one.

If you want to enlarge the radius size of the point you must change with the
pointRadius parameter of your Style object :

for example :

 var style = new OpenLayers.Style({
                         pointRadius: "${radius}",
                         fillColor: "#ffcc66",
                         fillOpacity: 0.8,
                         strokeColor: "#ff0000",
                         strokeWidth: 2,
                         strokeOpacity: 0.3
                     }, {
                         context: {
                             radius: function(feature) {   
                                    /*
console.log(Math.min(feature.attributes.count,7) + 4);
                                       
if((Math.min(feature.attributes.count,7) + 4)<7) {
                                            return
Math.min(feature.attributes.count,7) + 3;
                                        }
                                        else {return
Math.min(feature.attributes.count,7) + 7;} */
                                return Math.min(feature.attributes.count,7)
+ 4;
                             }
                         }
                     });

GML = new OpenLayers.Layer.Vector(
                        "GML", {
                         strategies:[
                                            new OpenLayers.Strategy.Fixed(),
                                            new
OpenLayers.Strategy.Cluster()
                              ],
                         protocol: new OpenLayers.Protocol.HTTP({
                             url: "./poi_random/gml/random_poi.gml",
                             format: new OpenLayers.Format.GML()                               
                         }),
                            styleMap:new OpenLayers.StyleMap({
                             "default": style,
                             "select": {
                                 fillColor: "#8aeeef",
                                 strokeColor: "#32a8a9"
                             }
                         })
                     });



it merge the features when they are 

Yves Jacolin (free) wrote:
> 
> Le Wednesday 22 October 2008 12:33:04 arno974, vous avez écrit :
>> Hello Yves,
>>
>> Tried to add a new OpenLayers.Strategy.Fixed(), in your strategies and it
>> should work.
>> I noticed that the cluster doesn't work if i don't use the fixed
>> strategy.
>> Maybe a bug or i didn't use it in a good way.
>>
>> Here you will find an example : http://geotribu.net/?q=node/47
>>
>> Regards
>>
>> Arnaud
>>
>> Yves Jacolin (free) wrote:
>> > Hello,
>> >
>> > I am trying to set up a cluster strategy for one of my vector layer. I
>> > add this code to my existing code:
>> >   var vector = new OpenLayers.Layer.Vector(name,
>> >                   {
>> >                      strategies: [
>> >                         new OpenLayers.Strategy.Cluster({distance:20})
>> >                       ]
>> >                   }
>> >                 );
>> > Before this, the code was " var vector = new
>> > OpenLayers.Layer.Vector(name);"
>> >
>> > I fill my vectorLayers later, reading a postgis result with:
>> >
>> > var feature = wktParser.read(_tmp[1]);
>> > [..]
>> > vectorLayer.addFeatures([ feature ]);
>> >
>> > I get only one feature (instead of 2) for all the zoom level. I tried
>> to
>> > change the distance option above, but nothing append. If I check the
>> DOM,
>> > nothing show me that there are more than 1 feature in this layer.
>> >
>> > Where am I wrong?
>> >
>> > Y.
>> > PS : the code is much more longer than here and is split in several
>> > functions
>> > so I can't show you all in once, I tried to put the most readable as
>> > possible.
>> > --
>> > Yves Jacolin
> Hi,
> 
> Thanks Arnaud, but it doesn't change anything for me, except that now I
> have 
> to define a protocol parameter in my Vector constructor.
> 
> Do I need to load data when creating the layer? Currently I load my data
> later 
> in the process (at the end of the page) as I need to load different data 
> after the search process.
> 
> Y.
> -- 
> Yves Jacolin
> ---
> http://softlibre.gloobe.org
> _______________________________________________
> Users mailing list
> Users at openlayers.org
> http://openlayers.org/mailman/listinfo/users
> 
> 

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