Ability to configure minimize/maximize/restore buttons

[TheColorRed]

When creating a window, I would like to be able to do the following to the window:

• Remove the minimize button
• Remove the maximize/restore button
• Don't allow the user to interact with other windows until the dialog is closed (unless the dialog opens another dialog).

These are common features of windows in applications. Currently you can only force the window to be on top, but these additional features would be helpful.

In this pseudo code, I would make the app the parent by passing the app to the .set_parent() (or whatever it would be called). You may not even need to pass the app to the function but I don't really know. Then there would also be functions to enable/disable the minimize/maximize buttons:

export component MyDialog inherits Window {}

fn main() {
  let app = MainWIndow::new();

  app.on_open_dialog(move || {
    let win = MyDialog::new().unwrap();
    win.set_minimizable(false);
    win.set_maximizable(false);
    win.set_parent(app);
    win.show();
  });

  app.run();
}

[Enyium]

I proposed the latter in #6607.

The button issue is supported in winit through its WindowButtons type and the APIs that use it, which Slint could make use of. The Window component also has the no-frame property. I think customizability support for these window buttons should also be realized using properties, which Slint's Dialog component, that seems to inherit Window, could use to hide some buttons by default.

[ogoffart]

Modal dialog is already tracked in #6607
I'm going to keep this issue for adding ability to configure the title bar buttons.