[Qgis-user] How to make use of python variables in Qgis filter expression

[Mathieu Bossaert (CEN L-R)]

Good morning, 

thanks to the new Qgis, I can make a really pratical interface to my postgis database. I want to make use of relationnal value in the editing form. 
The table I use to populate the list is a spatial table. 

I would like to restrict the list of available values in the form to the objects within the current extent of my map. 

I found an example wich is ok but I would like to make use of a variable instead of a fixed extend (GeomFromWKT()). 
The example I tried is here : http://www.3liz.com/blog/rldhont/index.php?post/2012/11/06/Spatial-operators-in-QGIS-expression 

Thanks a lot, 

Mathieu 


-- 
Mathieu BOSSAERT 
Responsable du système d'information 

Membre de la Fédération des Conservatoires d'espaces naturels www.reseau-cen.org 

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