Rust Programming By Example

Loading a playlist

We can save playlists, but still cannot load them. Let's start by adding a load() method to Playlist:

    pub fn load(&self, path: &Path) {
        let mut reader = m3u::Reader::open(path).unwrap();
        for entry in reader.entries() {
            if let Ok(m3u::Entry::Path(path)) = entry {
                self.add(&path);
            }
        }
    }

Here, we create a m3u::Reader with the specified path. We loop over the entry and if we were able to retrieve a m3u::Entry::Path, we add it to the playlist widget.

We'll now modify the open dialog to allow selecting M3U files:

fn show_open_dialog(parent: &ApplicationWindow) -> Option<PathBuf> {
    let mut file = None;
    let dialog = FileChooserDialog::new(Some("Select an MP3 audio file"),     Some(parent), FileChooserAction::Open);

    let mp3_filter ...