main.rs

use gtk::prelude::*;
use gtk::{atk, gio};

fn build_ui(application: &gtk::Application) {
    let window = gtk::ApplicationWindow::new(application);

    window.set_title("Accessibility");
    window.set_position(gtk::WindowPosition::Center);

    let button = gtk::Button::with_label("Click me!");
    let label = gtk::Label::new(Some("0"));
    let vbox = gtk::Box::new(gtk::Orientation::Vertical, 0);

    if let (Some(button_obj), Some(label_obj)) = (button.accessible(), label.accessible()) {
        // We set the description
        button_obj.set_description("Button to increase label value");

        // Then we setup the relation saying that the label is linked to the button.
        let relation_set = label_obj
            .ref_relation_set()
            .expect("Failed to get relation for label");
        let relation = atk::Relation::new(&[button_obj], atk::RelationType::LabelFor);

        relation_set.add(&relation);
    }

    vbox.add(&button);
    vbox.add(&label);

    window.add(&vbox);

    button.connect_clicked(move |_| {
        let value = label.text().parse().unwrap_or(0) + 1;
        label.set_text(&value.to_string());
    });

    window.show_all();
}

fn main() {
    let application = gtk::Application::new(
        Some("com.github.accessibility"),
        gio::ApplicationFlags::empty(),
    );

    application.connect_activate(|app| {
        // We build the application UI.
        build_ui(app);
    });

    application.run();
}