def paintEvent(self, a0):
QMainWindow.paintEvent(self, a0)
painter = QPainter()
painter.begin(self)
if len(self.labels) > 0:
drawLabels(painter, self.labels)
else:
painter.drawImage(self.width() / 2 - self.logo.width() / 2,
self.height() / 2 - self.logo.height() / 2,
self.logo)
painter.end()
