Rust Programming By Example

Opening files with a file dialog

There's another function we'll need before we can handle the click event of the open button. We need a function that'll show a file dialog to allow the user to select a file:

use std::path::PathBuf;

use gtk::{FileChooserAction, FileChooserDialog, FileFilter};

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 filter = FileFilter::new();
    filter.add_mime_type("audio/mp3");
    filter.set_name("MP3 audio file");
    dialog.add_filter(&filter);
    dialog.add_button("Cancel", RESPONSE_CANCEL);
    dialog.add_button("Accept", RESPONSE_ACCEPT);
    let result = dialog.run();
    if result ...