[OpenLayers-Users] Cluster strategy not working

[Heidt, Christopher M.]

i believe you need to add all your features at once,
so instead of looping the layer.addFeatures() call
you need to build all your features into an array and then call layer.addFeatures() once.


-----Original Message-----
From: users-bounces at openlayers.org on behalf of Shawn Oatley
Sent: Fri 8/28/2009 9:26 AM
To: x.zam at gmx.net; users at openlayers.org
Subject: Re: [OpenLayers-Users] Cluster strategy not working
 
I don't have any input regarding the code, but I have worked with IE 8. 
Not sure if that is an option, but if it is, they have a powerful script
debugger that allows you to step through the code also.

Shawn

>>> Max Stephan <x.zam at gmx.net> 08/28/09 8:24 AM >>>

Hi Jerome,

I´d be very happy if I could use Firebug in this case (very nice tool
for
debugging and for tracking the DOM in my opinion) but as I mentioned
above:
I´m using an ActiveX-Control for reading out the Access-Database and for
sending further requests to it. And this method is only possible in
Internet
Explorer for which I haven´t found such a powerful debugging tool as
firebug
(firebug lite wasn´t useful).

Ok, now here´s the loop, which is adding the vector-features to my
vector-layer:
for (var i=0; i<mestArray.length; i++){
    addVector(vectorLayer, mestArray[i][1], mestArray[i][0]);
}
The first parameter is the target-layer, the second is a lonlat-object
and
the third is an attribute for the features.

And here´s the addVector-function:
function addVector(layer, lonlat, mestId){
   var geometryObjekt = new
OpenLayers.Geometry.Point(lonlat.lon,lonlat.lat);
   var vectorObjekt = new OpenLayers.Feature.Vector(geometryObjekt);
   vectorObjekt.attributes.mest = mestId;
   layer.addFeatures([vectorObjekt]);
}

And concerning your english: No need to be worried. I´m understanding
everything.

Thx in advance
Max Stephan

Jerome Freyre wrote:
> 
> Can you also show us your method that parse and add the feature to the
 
> layer?
> 
> I think another good way to explore is to use firefox and firebug.
> 
> With firebug, you can add breakpoints and the go step-by-step...
> 
> 
> Whith that, you should put a breakpoint into your method that parse  
> and add features to layer and another one into the cluster strategy  
> (Think to not use the OpenLayers minimised but the complete source) to
 
> see if software run into the class correctly...
> 
> 
> Hope my english is quite understandable.... :)
> 
> 
> 
> Jérome
> 
> 
> 
> Le 28 août 09 à 14:01, Max Stephan (via Nabble) a écrit :
> 
>> Hi Jerome,
>>
>> thanks for your reply. I already tried that but it causes an error  
>> ("this.layer.events" is null or no object) and the map content isn 
>> ´t shown.
>>
>> Any other ideas?
>>
>> Greets,
>> Max Stephan
>> Jerome Freyre wrote:
>> Hi Max,
>>
>> Personnally, when I use Cluster Strategy, I create separatly the  
>> strategy and the I activate it.
>>
>> 		
>> 			var strat = new
OpenLayers.Strategy.Cluster({distance:20});
>> 			vectorLayer = new
OpenLayers.Layer.Vector("Vektorlayer",{
>> 			strategies: [
>> 				strategy
>> 			],
>> 			styleMap: vectorStyle2, maxResolution: 19});
>> 			strat.activate();
>>
>>
>> Hope it will be usefull....
>>
>> Sincerly,
>> Jérome
>>
>> Max Stephan wrote:
>> Hi everybody,
>>
>> I`m having problems getting the cluster strategy to work. It simply  
>> makes no difference in terms of appearance if I add it to the  
>> VectorLayer or not.
>>
>> This is my code for the layer:
>> 		vectorLayer = new
OpenLayers.Layer.Vector("Vektorlayer",{
>> 			strategies: [
>> 				new
OpenLayers.Strategy.Cluster({distance:20})
>> 			],
>> 			styleMap: vectorStyle2, maxResolution: 19});
>>
>>
>> The reason why I want to add it is that I have 480 Features  
>> alltogether on my map and even when zooming into some areas there  
>> are still around 150 features left in the bbox causing  
>> InternetExplorer to slow down (don´t know if it´s the same case  
>> with Firefox, but I gotta use IE to use ADODB-Connection to an  
>> Access Database in the Intranet).
>>
>> Those features are created and added step by step with an addVector- 
>> method I have implemented that reads out the coordinates and  
>> attributes of the database for a single feature and then jumps to  
>> the next entry and repeats the procedure till all features have been 

>> added.
>>
>> greets and thx in advance
>> Max Stephan
>>
>>
>> View message @
>>
http://n2.nabble.com/Cluster-strategy-not-working-tp3533851p3534202.html
>> To unsubscribe from Re: Cluster strategy not working, click here.
>>
> 
> 
> 

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