EX12.22.py

# 12.22 (Flip coins) Write a program that displays heads (H) or tails (T) for each of nine
# coins, as shown in Figure 12.31c–d. When a cell is clicked, the coin is flipped.
# Write a custom cell class that extends Label. In the initializer of the class, bind
# the event <Button-1> with the method for flipping the coin. When the program
# starts, all cells initially display H.

from tkinter import *  # Import tkinter


class CoinLabel(Label):
    def __init__(self, container, text):
        Label.__init__(self, container,
                       text=text, font="Helvetica 30 bold")
        self.bind("<Button-1>", self.flip)

    def flip(self, event):
        if self["text"] == "H":
            self["text"] = "T"
        else:
            self["text"] = "H"


class MainClass:
    def __init__(self):
        window = Tk()  # Create a window
        window.title("Flip Coin")  # Set title

        frame = Frame(window)
        frame.pack()

        for i in range(3):
            for j in range(3):
                CoinLabel(frame, text="H").grid(row=i, column=j)

        window.mainloop()  # Create an event loop


MainClass()