Mastering GUI Programming with Python

Loading the media

Just as a hardware media player requires a CD, a DVD, or a Blu-ray disc loaded into it to actually play anything back, our QMediaPlayer also needs some kind of content loaded before it can play any audio. Let's explore how to load a sound from a file.

Start by adding a button to the SoundWidget layout, as follows:

        self.file_button = qtw.QPushButton(            'Load File', clicked=self.get_file)        self.layout().addWidget(self.file_button, 4, 0)

This button calls to the get_file() method, which looks like this:

    def get_file(self):        fn, _ = qtw.QFileDialog.getOpenFileUrl(            self,            "Select File",            qtc.QDir.homePath(),            "Audio files (*.wav *.flac *.mp3 *.ogg *.aiff);; All files (*)"        )        if fn:            self.set_file(fn)

This method simply calls QFileDialog ...