widget_led.py 文件源码

def paintEvent(self, event):
        painter = QPainter()
        painter.begin(self)

        colour = self._colour
        if not self._lit:
            colour = self._colour.darker(300)
        painter.setPen(QPen(Qt.black, 1))
        painter.setBrush(QBrush(colour))

        rect = event.rect()
        radius = min(rect.width(), rect.height()) / 3
        painter.drawEllipse(rect.center(), radius, radius)

        painter.end()