What pattern to use when setting input variables from another thread?

[gcb]

I'm moving all my logic to another thread and keeping the main thread for slint.

fn main() -> Result<(), Box<dyn Error>> {
	let ui = MainWindow::new().unwrap();
	let ui_handle = ui.as_weak();
	let ui_handle_sub = ui.as_weak();

	ui.on_changed({
		move || {
			let ui = ui_handle.clone().unwrap(); // OK
		...
		}
	});

	std::thread::spawn(move || {
// (this is actually in an msg event loop)
			let ui = ui_handle_sub.clone().unwrap(); // Not OK. this is line 136 in the error.
			ui.set_status_text( slint::SharedString::from("hi") );
		}
	});

	ui.run()?;
	Ok(())
}

gives:

thread '<unnamed>' panicked at src/main.rs:136:57:
Trying to upgrade a Weak from a different thread than the one it belongs to

[ultimaweapon]

You need to use invoke_from_event_loop.

[gcb]

Thank you! for some reason when reading the docs I misread that was only for slint code talking between callbacks and such.