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shutdown function

Now that you know about window manager properties and
how to capture them, you were asked to write the code for the
shutdown() function:

from tkinter import *
import pygame.mixer

app = Tk()
app.title("Head First Mix")
app.geometry('250x100+200+100')

sound_file = "50459_M_RED_Nephlimizer.wav"

mixer = pygame.mixer
mixer.init()

def track_start():
track.play(loops = -1)

def track_stop():
track.stop()
def shutdown():
Simply arrange for the track.stop()
track to stop playing
when the window closes.

track = mixer.Sound(sound_file)

start_button = Button(app, command = track_start, text = "Start")
start_button.pack(side = LEFT)
stop_button = Button(app, command = track_stop, text = "Stop")
stop_button.pack(side = RIGHT)
Call “app.protocol()” app.protocol(“WM_DELETE_WINDOW", shutdown)
before the call to
“app.mainloop()”. app.mainloop()

324 Chapter 9