Need API to programmatically close child window after form submission

[sadlrxn]

Description

I'm working on a Slint UI application where my main window contains a button that opens a new child window with a form. I want to automatically close this child window after the form is successfully submitted (when no validation errors are found).

Currently, window closing is only handled through the on_close_request event, which is triggered by window management actions (like clicking the X button). However, I need a way to programmatically close the window from within my code after form submission.

Current Behavior

• Main window opens child window via button click
• Form submission is processed
• Window remains open even after successful submission
• Window can only be closed through window manager actions

Desired Behavior

• Main window opens child window via button click
• Form submission is processed
• If submission is successful (no errors), window automatically closes
• If submission has errors, window remains open

Question

Is there an API method available to programmatically close a Slint window? Looking for something similar to:

// Pseudo-code of what I'm looking for
if form_submission.is_successful() {
    child_window.close();
}

or

• The on_close_request event handler is not sufficient for this use case as it only handles window manager close events
• Need a programmatic way to trigger window closure from within the application logic

similar issue: #5465 marked answered but it's not.

[Enyium]

Why to you post this as a discussion and as an issue?!

[sadlrxn]

My bad, it was a mistake. Also, droping a strong reference doesn't close the window.
Using .hide() doesn't free up the memory it is using. or maybe i am doing it wrong.

            update_window
                .unwrap()
                .global::<TableData>()
                .on_send_close_request({
                    let weak_app = Rc::clone(&update_window);
                    move || {
                        println!("droping update window");
                        drop(weak_app.upgrade().unwrap());
                    }
                });

[Enyium]

You're dropping a strong reference you just created via upgrade(). That's like i += 1; i -= 1;. I think you only need to manage your own strong references and their dropping, if you're holding them in a long-living struct. If you let Slint manage your window component references and aren't holding on to strong references anywhere else, hide() should suffice. EDIT: E.g., if you're instatiating a window component, show()ing it, and distributing it in the form of weak references (via .as_weak()) moved into event handler closures, Slint's internals is the only place holding a strong reference to your window component, and hide() drops this reference.

[sadlrxn]

A