TR: [OpenLayers-Users] WFS layer data extent and loading strategies

[Favre, Sebastien]

Hello Eric,

I have tried to use : wfs.events.on({'loadend': function() { var extent = wfs.getDataExtent(); }}); But when the loading strategy is BBOX, extent is NULL if there is no feature to display on the map current bounding box.
If there are some features to display from the layer , extent has a value. 
If the loading strategy is FIXED, extent has always a value.
It seems logical but do you have any alternative to get data extent of a layer with BBOX loading strategy ?
Thank you.

Sébastien

-----Message d'origine-----
De : Eric Lemoine [mailto:eric.lemoine at camptocamp.com]
Envoyé : mardi 17 mai 2011 15:43
À : Favre, Sebastien
Cc : users at openlayers.org
Objet : Re: [OpenLayers-Users] WFS layer data extend ans loading strategies

2011/5/17 Favre, Sebastien <Sebastien.Favre at spotimage.fr>:
> Hello to all,
>
> I'm trying to use function getDataExtent() on a WFS layer object.
> The function works well when the loading strategy of the layer is FIXED.
> When loading strategy is BBOX, function returns NULL.
> Does someone has a solution to know max extent of the layer objects using a BBOX loading strategy ?

Do you call getDataExtent from a loadend listener? If not, you should.

wfs.events.on({'loadend': function() { var extent = wfs.getDataExtent(); }});

Good luck.

--
Eric Lemoine

Camptocamp France SAS
Savoie Technolac, BP 352
73377 Le Bourget du Lac, Cedex

Tel : 00 33 4 79 44 44 96
Mail : eric.lemoine at camptocamp.com
http://www.camptocamp.com

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