Can I create a window that doesn't take the user's focus anyway?

[LeeeSe]

My App needs to create a window on the Mac that requires the window to not take away the user's focus from the previous application due to a user's click, similar to the Emoji App on the Mac!

[LeeeSe]

Currently I'm using a more cumbersome way to accomplish my needs, but the user experience is not very good

[bjorn]

Either typo or clipping issue: "below"

[LeeeSe]

Thanks for the heads up.
The reason for this problem is that I set the window width to some fixed value. It was working fine with Chinese fonts, but it looks like it needs some changes!

[bjorn]

It's unlikely for Slint to offer a generic API for this, but fortunately you can interact with the backend directly. For example if you're using winit, then see the following issue for a discussion about achieving this: rust-windowing/winit#3072. Also see #4284 (reply in thread) for a winit and macOS-specific customization example.

[LeeeSe]

I apologize for my lack of programming skills.
I've been exploring for hours, but I still haven't figured out how to insert an event_loop into a slint, and this is what I've been able to code so far

use i_slint_backend_winit::winit::event_loop::EventLoopBuilder;
use i_slint_backend_winit::winit::platform::macos::WindowBuilderExtMacOS;
use i_slint_backend_winit::winit::platform::macos::EventLoopBuilderExtMacOS;

slint::include_modules!();

fn main() -> Result<(), slint::PlatformError> {
    let mut backend = i_slint_backend_winit::Backend::new().unwrap();

    let event_loop = EventLoopBuilder::new()
        .with_activate_ignoring_other_apps(false)
        .build();

    backend.window_builder_hook = Some(Box::new(|builder| {
        builder
            .with_fullsize_content_view(true)
            .with_title_hidden(true)
            .with_titlebar_transparent(true)
    }));


    slint::platform::set_platform(Box::new(backend));
    let ui = AppWindow::new()?;
    let calc = ui.window();

    ui.run()
}

[ogoffart]

You can use i_slint_backend_winit::with_event_loop_window_target to access the event loop. But i'm afraid with_activate_ignoring_other_apps cannot be changed.
We would need to add a hook to access the EventLoopBuilder from the winit backend.

[LeeeSe]

I'm currently accomplishing my needs by modifying the event_loop.rs source code directly, it would be great if I could add EventLoopBuilder!

event_loop.rs

impl NotRunningEventLoop {
    fn new() -> Result<Self, PlatformError> {
        let mut builderr = winit::event_loop::EventLoopBuilder::with_user_event();
        let mut builder = builderr.with_activation_policy(Prohibited);

[bjorn]

Whoops, sorry I missed that EventLoopBuilder was something else than WindowBuilder. Good job on solving your problem on the Slint side! For sure it would be nice if this was possible without modifying Slint.

[LeeeSe]

If anyone finds that the software cannot be opened after being packaged into an .App

just add

<key>LSUIElement</key>
<true/>

to info.plist