def drawEllipse(self, rect):
     device = self.nullDevice()
     if device is None:
         return
     if device.mode() != QwtNullPaintDevice.NormalMode:
         QPaintEngine.drawEllipse(rect)
         return
     device.drawEllipse(rect)
 def drawEllipse(self, rect):
     device = self.nullDevice()
     if device is None:
         return
     if device.mode() != QwtNullPaintDevice.NormalMode:
         QPaintEngine.drawEllipse(rect)
         return
     device.drawEllipse(rect)