Message ('Cannot emit Qt Signal : ', AttributeError("'MainWindow' object has no attribute 'emit'"))

[baugetfa]

This error message is raised in openalea.visualea.node_widget.SignalSlotListener.call_notify. The cause is the obsolete PyQt4 code:

self.qobj().emit(QtCore.Signal("notify"), sender, event

I tried what is given in the documentation but I was enable to get something working. I still got the message has no attribute 'emit'.

[baugetfa]

I think that in fact the line raising the message is useless. See my proposition with this commit.
Indeed, we manage the notification with notify defined in objects, so why trying using Qt notification.