Check if window is in background Tkinter

Question: Check if window is in background

Using tk.self.winfo_containing(... you can determine if a widget, here the root window, is shown at Top Level.In this example, the center of the given window is used as visible point.

Note: While you move the window, the result may be False.

Reference:- Tkinter.Widget.winfo_containing-method

Returns the widget at the given position, or None

import tkinter as tkclass App(tk.Tk):    def __init__(self):        super().__init__()        self.is_toplevel()    def is_toplevel(self):        width, height, x, y = self.winfo_width(), self.winfo_height(), \                              self.winfo_rootx(), self.winfo_rooty()        if (width, height, x, y) != (1, 1, 0, 0):            is_toplevel = self.winfo_containing(x + (width // 2),                                                y + (height // 2)                                                ) is not None            print('is_toplevel: {}'.format(is_toplevel))        self.after(2000, self.is_toplevel)if __name__ == "__main__":    App().mainloop()

Tested with Python: 3.5 - 'TclVersion': 8.6 'TkVersion': 8.6 - Linux
Note: Confirmed, works on Windows.
May not work on MACOS.