《Head First Programming》---python 10_GUI Mixer2
- sound_panel模块
python
from tkinter import *
import pygame.mixer
class SoundPanel(Frame):
def __init__(self, app, mixer, sound_file):
Frame.__init__(self, app) #这里用到了tkinter的Frame
self.track = mixer.Sound(sound_file)
self.track_playing = IntVar()
track_button = Checkbutton(self,
variable = self.track_playing,
command = self.track_toggle,
text = sound_file
)
track_button.pack(side = LEFT)
self.volume = DoubleVar()
self.volume.set(self.track.get_volume())
volume_scale = Scale(self,
variable = self.volume,
from_ = 0.0,
to = 1.0,
resolution = 0.1,
command = self.change_volume,
label = 'Volume',
orient = HORIZONTAL
)
volume_scale.pack(side = RIGHT)
def track_toggle(self):
if self.track_playing.get() == 1:#囧,刚开始.get()未写一直没有声音
self.track.play(loops = -1) #循环播放至结束
else:
self.track.stop()
def change_volume(self, v):
self.track.set_volume(self.volume.get())- hfmix主程序
python
from tkinter import *
from sound_panel import *
import pygame.mixer
import os #与操作系统相关的模块
app = Tk()
app.title("Head Firs Mix2")
mixer = pygame.mixer
mixer.init()
dirList = os.listdir(".")
for fname in dirList:
if fname.endswith(".wav"):
panel = SoundPanel(app, mixer, fname)
panel.pack()
def shutdown():
mixer.stop()#书中这里有问题的，改正为mixer
app.destroy()
app.protocol("WM_DELETE_WINDOW", shutdown)
app.mainloop()- 运行截图：
