Mastering GUI Programming with Python

Setting the volume

Our final playback feature will be volume control. To allow us to control the playback level, QMediaPlayer has a volume parameter that accepts values from 0 (muted) to 100 (full volume).

We'll simply add another slider widget to control the volume, as follows:

        self.volume = qtw.QSlider(            minimum=0,            maximum=100,            sliderPosition=75,            orientation=qtc.Qt.Horizontal,            sliderMoved=self.player.setVolume        )        self.layout().addWidget(self.volume, 2, 1)

After setting the minimum and maximum values accordingly, we just need to connect sliderMoved to the media player's setVolume() slot. That's all there is to it!

For smoother volume control, the Qt documentation recommends converting the slider's linear scale to a logarithmic scale. We ...