How to handle geometry change in vector layer?

Question

I'm building a plugin in Python that manage some lists of WKT from different intern sources (web services, bd, etc..). I can display every source without any problem.

For displaying them, I use a QVectorLayer of type "memory" (in QGIS 1.7.4 by the way).

I would like the user to be able to edit a feature (the geometry) when it's possible, and I would change the value according to the source.

So I was very interested by:

void QgsVectorLayer::geometryChanged(QgsFeatureId fid, QgsGeometry &geom)

Doc is here

But when I write this:

layer.geometryChanged.connect(self._geometryChanged)
[...]
@QtCore.pyqtSlot()
def _geometryChanged(self, fid, geom):
    [...]

I've got this error:

AttributeError: 'QgsVectorLayer' object has no attribute 'geometryChanged'

Any idea How I could do it?

Is there any better documentation about inner elements in QGIS?

Answer 1

You can't find it because it doesn't exist in the 1.7.4 python bindings.

The geometryChanged signal was added at commit 9f4996fc210eaa8c2495c912bc7214d37256ea63 on Jan 13th 2012

You only option in order to use this signal is to upgrade to the latest build.