def keyPressEvent(self, event):
        """Override Qt method"""
        ctrl = event.modifiers() & Qt.ControlModifier
        key = event.key()
        handled = False
        if ctrl and self.count() > 0:
            index = self.currentIndex()
            if key == Qt.Key_PageUp:
                if index > 0:
                    self.setCurrentIndex(index - 1)
                else:
                    self.setCurrentIndex(self.count() - 1)
                handled = True
            elif key == Qt.Key_PageDown:
                if index < self.count() - 1:
                    self.setCurrentIndex(index + 1)
                else:
                    self.setCurrentIndex(0)
                handled = True
        if not handled:
            QTabWidget.keyPressEvent(self, event)