Make Tkinter not beeing the "Active window" even though i click on it

Question

I'm using Tkinter to create an overlay on top of every other windows. For now, if I click on my overlay, like an image or a button, it changes the active windows to Tkinter, obviously. What i want is to use my overlay but keeping my active windows. I looked around click-through type of things but for now it's either i can't click my buttons and the window remain active, either I can but Tkinter switch to active window. I'm new to python and I'm not sure if my code worth sharing, as it is quite simple, but it might to avoid any misunderstanding :

root = Tk()
root.geometry("1920x1080")
root.config(bg='#add123')
root.wm_attributes('-transparentcolor', '#add123')
root.attributes("-fullscreen", True)
root.attributes('-topmost',True)

EDIT: I'm going to try to be as clear as possible. If I use a GUI made with Tkinter, like any others widows, it will become the "Active window". So if I'm using my overlay with another app let's say Firefox. Thanks to topmost attribute, my overlay will stay on top while using Firefox as "active window" which is what i want. But if click a button on my overlay, the "active window" will become Tkinter. To give an example, if I star typing in the URL bar then click a button on my overlay, I won't be able to continue to type in the URL bar since Firefox is no more the "Active window". This is an issue to me as I'm using this overlay over a full screen app that pause when it's inactive. Thanks again ;)

EDIT2: So I might be doing something wrong i'll share the code with you:

from tkinter import *
from PIL import Image, ImageTk
import win32gui
import win32con

def setClickthrough(hwnd):
    print("setting window properties")
    try:
        styles = win32gui.GetWindowLong(hwnd, win32con.GWL_EXSTYLE)
        styles = win32con.WS_EX_LAYERED | win32con.WS_EX_TRANSPARENT
        win32gui.SetWindowLong(hwnd, win32con.GWL_EXSTYLE, styles)
        win32gui.SetLayeredWindowAttributes(hwnd, 0, 255, win32con.LWA_ALPHA)
    except Exception as e:
        print(e)

width = 1920 #self.winfo_screenwidth()
height = 1080 #self.winfo_screenheight()

root = Tk()
root.geometry("1920x1080")
root.config(bg='#add123')
root.wm_attributes('-transparentcolor', '#add123')
root.attributes("-fullscreen", True)
root.wm_attributes("-topmost", 1)
bg = Canvas(root, width=width, height=height)

setClickthrough(bg.winfo_id())

frame = ImageTk.PhotoImage(file="sample.png")
bg.create_image(1920/2, 1080/2, image=frame)
bg.button_1 = Button(root,text='Click')
bg.button_1.pack()
bg.pack()
root.mainloop()

At this point, the image "sample.png" is clickable trough but not the Button. If that make sense

Answer 1

You need just a partial-clicktrhough-area?

Like I had explained in the comment section. You would need to use the window manager of your operating system for this task.

Don't try to send events to other application, you might break something and that's why it's considered an anti pattern (something to avoid).

Something like in the Q&A I just posted will use native calls. Try making this canvas to your area and position your buttons around it. It Could work, but not sure, since I never tried.

Alternatively try to reverse the click through attribute when your pointer moves in the area of your interactive section.

Also note that, at least under Windows, you will always lose the focus on the previous window when interacting with another and this seems not avoidable, since the caret (the blinking thingy where you type at) is related to this.