# tk_fullscreen_toggle.py

# tk_fullscreen_toggle.py

import tkinter as tk
import ctypes
import time

# Define ctypes structures and functions
class POINT(ctypes.Structure):
    _fields_ = [("x", ctypes.c_long), ("y", ctypes.c_long)]

def get_xy():
    point = POINT()
    ctypes.windll.user32.GetCursorPos(ctypes.byref(point))
    return point.x, point.y

def gui_update(event):
    global cx, cy, cw, ch
    # get the root position and height
    if not fullscreen:
        cx = root.winfo_x()
        cy = root.winfo_y()
        cw = root.winfo_width()
        ch = root.winfo_height()

def make_fullscreen():
    global fullscreen, width, height
    fullscreen = True
    fullscreen_button.place_forget()
    root.overrideredirect(True)
    width = root.winfo_screenwidth()
    height = root.winfo_screenheight()
    canvas.config(width=width, height=height)
    fullscreen_title_bar()

def kill_fullscreen():
    global fullscreen
    fullscreen = False
    fs_btn()
    root.overrideredirect(False)
    root.geometry(f"{cx}x{cy}+{cw}+{ch}")
    canvas.config(width=cw, height=ch)

def fullscreen_title_bar():
    global title_bar
    if y < 40:
        if not title_bar:
            title_bar = 1
            root.overrideredirect(False)
            root.geometry("%dx%d+-8+0" % (width, height-72))
    else:
        if title_bar:
            title_bar = 0
            root.overrideredirect(True)
            root.geometry("%dx%d+-0+0" % (width, height))

def toggle_title_bar():
    if -out > x or x > cw + out or -out > y or y > ch + out + 20:
        canvas.config(bg='darkred')
        root.overrideredirect(True)
        fullscreen_button.place_forget()
    else:
        canvas.config(bg='darkgreen')
        root.overrideredirect(False)
        fs_btn()

ww = 300
hh = 300

cx = 0
cy = 0

title_bar = 1
width = height = 0
fullscreen = 0

root = tk.Tk()
root.geometry("%dx%d+100+100" % (ww, hh))
canvas = tk.Canvas(root, width=ww, height=hh, bg='darkgreen')
canvas.pack()

# Create a fullscreen button widget
fullscreen_button = tk.Button(canvas, text="Full Screen", command=make_fullscreen, bg="gray90")
def fs_btn():
    fullscreen_button.place(x=5, y=5)
fs_btn()

gui_update(0)
root.bind("<Configure>", gui_update)

out = 50
while 1:
    x, y = get_xy()
    if not fullscreen:
        x = (x - cx)
        y = (y - cy)
        toggle_title_bar()
    else:
        fullscreen_title_bar()

    canvas.update()
0/0