Requesting the window to be closed?

[npwoods]

When I close out a Slint window, the callback specified by on_close_requested() will be invoked. How do I initiate this process manually from code, so I could have say a "quit" button or an "Exit" menu item? quit_event_loop() bypasses all of this apparatus.

[ogoffart]

on_close_requested() is to be used when the close request comes from the window manager.
You can simulate this with a slint::platform::WindowEvent::CloseRequested event. But I wouldn't recommand to do that for the "Exit" menu item. For that, i'd recommend that the callback handler for Exit and the for on_close_requested call the same helper function.