How do I make my python-kivy window become the focus when the mouse cursor is over the window?

I think I found a work-around but you maybe will not be satisfied with it.

Anyway , here is my solution :

import kivy
from kivy.uix.widget import Widget
from kivy.app import App
from kivy.clock import Clock
from kivy.core.window import Window

import pyautogui  # for mouse click

kivy.lang.Builder.load_string("""
#:kivy 2.0.0

<Main>:
    
    ScrollView:
        do_scroll_x: True
        do_scroll_y: True
        size: root.size
        
        BoxLayout:
            size_hint: 1, None
            width: 50
            orientation: "vertical"
                
            Label:
                text: "Hello World !"
                font_size: 25
        
            Button:
                id: my_button
                text: "click me !"
                font_size: 25
                
                on_release:
                    root.button_callback()
        
""")


class Main(Widget):

    def button_callback(self):  # fired when button is clicked
        print("clicked on button !")

    def window_callback(self, instance):  # fired when cursor entered window
        Window.restore()  # seems like doesn't work
        Window.show()  # this also

        # so I do this when the mouse is hover on the window
        # import pyautogui first
        if Window.focus == False:
            pyautogui.click()  # a mouse click for focusing the window

            print(True)  # just to clarify the above line got executed

        print(f"window is focus ? {Window.focus}")  # although it may says the windows is not focused , it should be

    def update(self, dt):
        Window.bind(on_cursor_enter = self.window_callback)  # bind when on_cursor_enter


class MyKivyApp(App):

    def build(self):
        Clock.schedule_interval(Main().update, 1/60)

        return Main()


if __name__ == "__main__":
    MyKivyApp().run()

How it works : when mouse is hovered on the app window , it will have one mouse click by pyautogui to force focus to the app window programmatically.

The only line of code inside the update func and the window_callback func will fired when the mouse is hover on the window ( i.e. like when the mouse leaves and moves back to the app window , the window_callback will be fired ) then I use pyautogui to do a mouse click by itself so that the window can be focused by itself. This way , the kivy app window can be focused when the mouse moves back to the window.

Moreover , according to this stackoverflow answer , the SLD2 on desktop app can hide the window but to restore / show it. It can scroll even when the app window is not focused ( I tested )