I'm working on a Qgis plugin with python,
I'm creating a feature and I show a feature form to edit the attributes. But after the openFeatureForm function call the program crash and close
line = QgsFeature()
line.setGeometry(QgsGeometry.fromPolyline(transformedLine))
pr = parcoursLayer.dataProvider()
pr.addFeatures([line])
qgis.utils.iface.openFeatureForm(parcoursLayer,line)
we are facing the same issue here. It seems related to a bug in PyQt4.
See preloadForm method comment here for a workaround :
http://qgis.org/api/classQgisInterface.html
and here the issue raised to QT / Pyqt 4 by NathanW:
http://forum.qt.io/topic/26562/crash-calling-c-method-using-quiloader-from-pyqt4
Before to set geometry of 'transformedLine' try out to print it. This object should have a form similar (if it is projected in meters) to this (for one feature):
[(366179,4.46968e+06), (357711,4.44966e+06), (363870,4.43041e+06), (382100,4.41947e+06), (396590,4.41078e+06)]
A list of QgsPoint.
The another strange thing is in:
pr.addFeatures([line])
You are passing a list where it is expected a feature but, the method 'addFeatures' does not exist in QgsDataProvider. It is in QgsVectorLayer. Normally it would be:
feat = QgsFeature()
feat.setGeometry(QgsGeometry.fromPolyline(transformedLine))
feat.setAttributes([1]) #one feature with id = 1; several features in a loop
your_layer.addFeature(feat, True)
