I need to show point coordinates on the from dialog used to edit the attributes of a point.. I see that in the formOpen the dialog receives a layerId and a featureId, but no iface object, so how can get a provider to use the selectatId() and reach feature informations?

def formOpen(dialog,layerid,featureid):

(see here for a more detailed explanation of custom qgis forms)

  • What version of QGIS?
    – Nathan W
    Dec 7, 2013 at 2:50

1 Answer 1


never mind. I was fooled by the function declaration used in the example. Actually, it should be:

def formOpen(dialog,layer,feature):
    geometry = feature.geometry()
    wktString = geometry.exportToWkt()

That is: the function is receiving the ACTUAL object, not it's id. So I can access the geometry by direct function call.

  • 2
    My blog post if pre 2.0 which used to only get pasted the feature id. Now it gets passed the whole object.
    – Nathan W
    Dec 7, 2013 at 13:14

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