Python - Graphical Interface Elements: Selecting the right tool(pygame.mixer(Sound, set_volume), tkinter(Scale))

Head First Programming
A learner's guide to programming
using the Python language
( O'Reilly Media)
David Griffiths (著) Paul Barry (著)

開発環境

• OS X Mavericks - Apple(OS)
• Emacs (CUI)、BBEdit - Bare Bones Software, Inc. (GUI) (Text Editor)
• Python (プログラミング言語)

Head First Programming A learner's guide to programming using the Python language (David Griffiths(著)、Paul Barry(著)、 O'Reilly Media )のChapter 10(Graphical Interface Elements: Selecting the right tool)、LONG EXERCISE(p.342)を解いてみる。

LONG EXERCISE(p.342)

コード(BBEdit)

sample342.py

#!/usr/bin/env python2.7
#-*- coding: utf-8 -*-

# python3.xではtkinter, python2.xではTkinter
# python3.xでpygame.mixerモジュールを上手くインストールできてないので2.7を使用
from Tkinter import *

import pygame.mixer

def trackToggle():
    if track_playing.get() == 1:
        track.play()
    else:
        track.stop()

def shutdown():
    track.stop()
    app.destroy()

def changeVolume(a):
    track.set_volume(volume.get())

sound_file = '50459_M_RED_Nephlimizer.wav'
mixer = pygame.mixer
mixer.init()
track = mixer.Sound(sound_file)

app = Tk()
app.title('Head First Mix')

track_playing = IntVar()
track_button = Checkbutton(app,
                           variable=track_playing,
                           command=trackToggle,
                           text='50459_M_RED_Nephlimizer.wav')
track_button.pack(side=LEFT)

volume = DoubleVar()
volume_scale = Scale(app,
                     variable = volume,
                     from_ = 0.0,
                     to = 1.0,
                     resolution = 0.1,
                     command = changeVolume,
                     label = 'Volume',
                     orient = HORIZONTAL)
volume_scale.pack(side=RIGHT)

app.protocol('WM_DELETE_WINDOW', shutdown)

app.mainloop()

入出力結果(Terminal)

$ ./sample342.py
$