Hi, seems there is a bug with the newest version of pyqt and sip, with pyqt-4.5.4 and sip-4.8.2 is possible to override label events as follow: self.imagelabel.mouseReleaseEvent=self.eventMouseRelease this snippet does't work with pyqt-4.6 and sip-4.9, the event is never triggered, regards Nicola