def create_checkbutton(self):
P0, widget_dims, board_dims = self.board.get_geometry()
x, y = P0
width, height = widget_dims
board_width, board_height = board_dims
x, y = x / board_width, y / board_height
width, height = width / board_width, height / board_height
button = Checkbutton(self.board)
button.place(relx=x, rely=y, relheight=height, relwidth=width, anchor="nw")
self.board.delete("line")
items = [item for item in button.keys() if len(item) > 2]
button.bind("<Enter>", lambda event: self.get_widget_info(button))
button.bind("<Leave>", lambda event: self.focus_out())
button.bind("<Button-3>", lambda event: self.modify(button, items))
self.manager.switch(button, items)
