Centering CTk() and Tk() windows to the main display (windows 10&11)

[HyperNylium]

When the CTk() window launches, it launches somewhere on your main display but doesn't really have a center function. I know this is kind of common knowledge by now but just wanted to put this here for anyone that is looking for it:

from customtkinter import CTk

def CenterWindowToDisplay(Screen: CTk, width: int, height: int, scale_factor: float = 1.0):
    """Centers the window to the main display/monitor"""
    screen_width = Screen.winfo_screenwidth()
    screen_height = Screen.winfo_screenheight()
    x = int(((screen_width/2) - (width/2)) * scale_factor)
    y = int(((screen_height/2) - (height/1.5)) * scale_factor)
    return f"{width}x{height}+{x}+{y}"

window = CTk()

# will launch a 900x400 window in the center of the main screen.
window.geometry(CenterWindowToDisplay(window, 900, 400, window._get_window_scaling()))

window.mainloop()

I originally made the function in tkinter but when i started to use customtkinter, the window wasn't really launching in the middle of the display. It was always offset a little. This new version takes in account for the scale factor of your display as well (100%, 125%, 150%, etc).

This is what the tkinter version looks like:

from tkinter import Tk

def CenterWindowToDisplay(Screen: Tk, width: int, height: int):
    """Centers the window to the main display/monitor"""
    screen_width = Screen.winfo_screenwidth()
    screen_height = Screen.winfo_screenheight()
    x = int((screen_width/2) - (width/2))
    y = int((screen_height/2) - (height/1.5))
    return f"{width}x{height}+{x}+{y}"

window = Tk()

# will launch a 900x400 window in the center of the main screen.
window.geometry(CenterWindowToDisplay(window, 900, 400)) 

window.mainloop()

[jessielw]

Works perfect, thanks!

[HyperNylium]

No problem. Glad it helped!

[magyrus1]

Funciona Perfeitamente
Obrigado ajudo muito D+.