SyncTk/modules/theme_titlebar.py

import platform
import sys
import sv_ttk
from distutils.version import StrictVersion as Version
from os import system
from tkinter import Misc, Tcl, Toplevel
from typing import Literal, Union

from ttkthemes import ThemedTk

from classes.enums import Theme

if sys.platform.startswith("win"):
    from ctypes import byref, c_int, sizeof, windll


def theme_title_bar(window: Union[ThemedTk, Toplevel, Misc], mode: Literal[Theme.DARK, Theme.LIGHT]) -> None:
    """
    MORE INFO:
    https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwmwindowattribute
    """

    if mode.value == "dark":
        value = 1
        #window.configure(background="#1c1c1c")
    elif mode.value == "light":
        value = 0
        #window.configure(background="#ffffff")
    else:
        raise ValueError()

    try:
    
        sv_ttk.set_theme(mode.value)

        window.update()
        
        if sys.platform.startswith("win"):
            
            hwnd = windll.user32.GetParent(window.winfo_id())
            DWMWA_USE_IMMERSIVE_DARK_MODE = 20
            DWMWA_USE_IMMERSIVE_DARK_MODE_BEFORE_20H1 = 19

            # try with DWMWA_USE_IMMERSIVE_DARK_MODE
            if windll.dwmapi.DwmSetWindowAttribute(hwnd, DWMWA_USE_IMMERSIVE_DARK_MODE, byref(c_int(value)), sizeof(c_int(value))) != 0:

                # try with DWMWA_USE_IMMERSIVE_DARK_MODE_BEFORE_20h1
                windll.dwmapi.DwmSetWindowAttribute(hwnd, DWMWA_USE_IMMERSIVE_DARK_MODE_BEFORE_20H1, byref(c_int(value)), sizeof(c_int(value)))

        elif sys.platform == "darwin":

            if value == 1:
                if Version(platform.python_version()) < Version("3.10"):
                    if Version(Tcl().call("info", "patchlevel")) >= Version("8.6.9"):  # Tcl/Tk >= 8.6.9
                        system("defaults write -g NSRequiresAquaSystemAppearance -bool No")
                        # This command allows dark-mode for all programs
            else:
                if Version(platform.python_version()) < Version("3.10"):
                    if Version(Tcl().call("info", "patchlevel")) >= Version("8.6.9"):  # Tcl/Tk >= 8.6.9
                        system("defaults delete -g NSRequiresAquaSystemAppearance")
                        # This command reverts the dark-mode setting for all programs.

    except Exception as err:
        print(err)