Gio.Notification creates another instance when clicked

[eminfedar]

Hello,

I’m trying to develop a Rust app which runs on background when closed (by using hide_on_close property on the ApplicationWindow) and send notifications to user with gio::Notificaiton.

Here is the example of creating the Application:

use adw::{Application};

fn main() {
    let application = Application::builder()
        .application_id("com.example.test")
        .build();

    application.connect_activate(on_activate);

    application.run();
}

Then I send a notification anywhere inside the program:

    let notif = Notification::new(format!("{} minutes left!", total_minutes).as_str());

    app.send_notification(Some("time-warning"), &notif);

After I clicked the notification, it creates another instance of the application (calls on_activate again). This makes application create the UI windows all over again because all the UI initialized in on_activate function.

How can I handle notifications properly? Can I get an information in on_activate function if it’s activated by a notification or not?

(it is actually not spesific a question on Rust, it is about how GTK works generally)

Thanks!

[jfrancis (Jason Francis)]

The typical way to handle this is to check in your on_activate if the app was already activated. You can set a flag, or use app.windows() to look to see if the windows are already created, or store a singleton for the windows, or anything you can come up with for the check.