# -*- coding: utf-8 -*-

# 注意文件编码也必须是utf-8

SCREEN_SIZE = (800, 600)

# 存放音乐文件的位置

MUSIC_PATH = "./MUSIC"

import pygame

from pygame.locals import *

from math import sqrt

import os

import os.path

def get_music(path):

# 从文件夹来读取所有的音乐文件

raw_filenames = os.listdir(path)

music_files = []

for filename in raw_filenames:

# 不是Windows的话，还是去掉mp3吧

if filename.lower().endswith('.ogg') or filename.lower().endswith('.mp3'):

music_files.append(os.path.join(MUSIC_PATH, filename))

return sorted(music_files)

class Button(object):

"""这个类是一个按钮，具有自我渲染和判断是否被按上的功能"""

def __init__(self, image_filename, position):

self.position = position

self.image = pygame.image.load(image_filename)

def render(self, surface):

# 家常便饭的代码了

x, y = self.position

w, h = self.image.get_size()

x -= w / 2

y -= h / 2

surface.blit(self.image, (x, y))

def is_over(self, point):

# 如果point在自身范围内，返回True

point_x, point_y = point

x, y = self.position

w, h = self.image.get_size()

x -= w /2

y -= h / 2

in_x = point_x >= x and point_x < x + w

in_y = point_y >= y and point_y < y + h

return in_x and in_y

def run():

pygame.mixer.pre_init(44100, 16, 2, 1024*4)

pygame.init()

screen = pygame.display.set_mode(SCREEN_SIZE, 0)

#font = pygame.font.SysFont("default_font", 50, False)

# 为了显示中文，我这里使用了这个字体，具体自己机器上的中文字体请自己查询

# 详见本系列第四部分：//eyehere.net/2011/python-pygame-novice-professional-4/

font = pygame.font.SysFont("simsunnsimsun", 50, False)

x = 100

y = 240

button_width = 150

buttons = {}

buttons["prev"] = Button("prev.png", (x, y))

buttons["pause"] = Button("pause.png", (x+button_width*1, y))

buttons["stop"] = Button("stop.png", (x+button_width*2, y))

buttons["play"] = Button("play.png", (x+button_width*3, y))

buttons["next"] = Button("next.png", (x+button_width*4, y))

music_filenames = get_music(MUSIC_PATH)

if len(music_filenames) == 0:

print "No music files found in ", MUSIC_PATH

return

white = (255, 255, 255)

label_surfaces = []

# 一系列的文件名render

for filename in music_filenames:

txt = os.path.split(filename)[-1]

print "Track:", txt

# 这是简体中文Windows下的文件编码，根据自己系统情况请酌情更改

txt = txt.split('.')[0].decode('gb2312')

surface = font.render(txt, True, (100, 0, 100))

label_surfaces.append(surface)

current_track = 0

max_tracks = len(music_filenames)

pygame.mixer.music.load( music_filenames[current_track] )

clock = pygame.time.Clock()

playing = False

paused = False

# USEREVENT是什么？请参考本系列第二部分：

# //eyehere.net/2011/python-pygame-novice-professional-2/

TRACK_END = USEREVENT + 1

pygame.mixer.music.set_endevent(TRACK_END)

while True:

button_pressed = None

for event in pygame.event.get():

if event.type == QUIT:

return

if event.type == MOUSEBUTTONDOWN:

# 判断哪个按钮被按下

for button_name, button in buttons.iteritems():

if button.is_over(event.pos):

print button_name, "pressed"

button_pressed = button_name

break

if event.type == TRACK_END:

# 如果一曲播放结束，就“模拟”按下"next"

button_pressed = "next"

if button_pressed is not None:

if button_pressed == "next":

current_track = (current_track + 1) % max_tracks

pygame.mixer.music.load( music_filenames[current_track] )

if playing:

pygame.mixer.music.play()

elif button_pressed == "prev":

# prev的处理方法：

# 已经播放超过3秒，从头开始，否则就播放上一曲

if pygame.mixer.music.get_pos() > 3000:

pygame.mixer.music.stop()

pygame.mixer.music.play()

else:

current_track = (current_track - 1) % max_tracks

pygame.mixer.music.load( music_filenames[current_track] )

if playing:

pygame.mixer.music.play()

elif button_pressed == "pause":

if paused:

pygame.mixer.music.unpause()

paused = False

else:

pygame.mixer.music.pause()

paused = True

elif button_pressed == "stop":

pygame.mixer.music.stop()

playing = False

elif button_pressed == "play":

if paused:

pygame.mixer.music.unpause()

paused = False

else:

if not playing:

pygame.mixer.music.play()

playing = True

screen.fill(white)

# 写一下当前歌名

label = label_surfaces[current_track]

w, h = label.get_size()

screen_w = SCREEN_SIZE[0]

screen.blit(label, ((screen_w - w)/2, 450))

# 画所有按钮

for button in buttons.values():

button.render(screen)

# 因为基本是不动的，这里帧率设的很低

clock.tick(5)

pygame.display.update()

if __name__ == "__main__":

run()