Buttons not appearing

[mpeters2]

MacOS 14
Arm64
Julia 1.10

I tried out the tutorial for pop-up messages from here, but the demo doesn't seem to work. I get a window that pops up, but no buttons.

using Mousetrap

main() do app::Application

    window = Window(app)

    child = Separator()
    message_overlay = PopupMessageOverlay()
    set_child!(message_overlay, child)

    show_message_action = Action("example.show_message", app)
    set_function!(show_message_action, message_overlay) do self::Action, message_overlay::PopupMessageOverlay
        message = PopupMessage("This is a message")
        set_button_label!(message, "OK")
        set_button_action!(message, self)
        show_message!(message_overlay, message)
    end

    button = Button()
    set_opacity!(button, 0)
    set_action!(button, show_message_action)
    push_front!(get_header_bar(window), button)

    set_child!(window, message_overlay)
    present!(window)
end

[MichaelSchloesser]

It seems to me, the button you are searching for should be added to the left side of the headerbar of your window. You cannot see it because its opacity is set to 0. Just delete the line

set_opacity!(button, 0)

Or replace it by

set_opacity!(button, 1.0)

[Clem Cords]

Yes, thank you, this exactly.

The opacity is set to zero but you can still activate the button by clicking it or pressing enter.