player.py 文件源码

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

        if len(self.m_histogram) == 0:
            painter.fillRect(0, 0, self.width(), self.height(),
                    QColor.fromRgb(0, 0, 0))
            return

        barWidth = self.width() / float(len(self.m_histogram))

        for i, value in enumerate(self.m_histogram):
            h = value * self.height()
            # Draw the level.
            painter.fillRect(barWidth * i, self.height() - h,
                    barWidth * (i + 1), self.height(), Qt.red)
            # Clear the rest of the control.
            painter.fillRect(barWidth * i, 0, barWidth * (i + 1),
                    self.height() - h, Qt.black)