# Tk_scalable.py

# Tk_scalable.py

from tkinter import *
import tkinter.font as tkFont

root = Tk()
root.title("Tk_scalable")

def exitclick():
    root.destroy()

class FullScreenApp(object):
    def __init__(self, master, **kwargs):
        self.master = master
        pad = 100
        self._geom = '600x400+0+0'
        master.geometry("{0}x{1}+0+0".format(
            master.winfo_screenwidth() - pad, master.winfo_screenheight() - pad))
        master.bind('<Escape>', self.toggle_geom)

    def toggle_geom(self, event):
        geom = self.master.winfo_geometry()
        print(geom, self._geom)
        self.master.geometry(self._geom)
        self._geom = geom
0

frame = Frame(root)
frame.pack()

fontStyle = tkFont.Font(family="Lucida Grande", size=40)
text_intro = "Press Escape !!!"
label = Label(root, text=text_intro, font=fontStyle)
label.place(relx=.5, rely=.5, anchor="center")

fontdefault = tkFont.Font(family="Lucida Grande", size=20)
close_button = Button(root, text="Close", command=exitclick, height=2, width=8, font=fontdefault)
close_button.place(relx=0.5, rely=0.8, anchor="center")

app = FullScreenApp(root)

root.mainloop()