本项目要求设计一个美观好用的音乐播放器，并能对乐曲库进行管理，同时，可以从网上下载音乐放入本地音乐库。项目将细分成UI设计、乐曲播放管理、乐曲库管理、音乐下载管理4个模块。
# -*- coding=utf-8 -*-
import wx
import urllib.request
import pygame # pip install pygame
import os
import re
import time
from threading import Thread
import math
import datetime
APP_TITLE = u'音乐播放器'
MAX_LYRIC_ROW = 15
LYRIC_ROW_REG = '\[[0-9]{2}:[0-9]{2}.[0-9]{2,}\]'
MAX_MUSIC_NAME_LEN = 18 # 歌名展示的时候最长字符限制
class mainFrame(wx.Frame):
'''程序主窗口类，继承自wx.Frame'''
def __init__(self):
'''构造函数'''
# 播放器的整体属性
self.width = 1280
self.height = 720
self.volume = 0
self.local_music_folder = "music_folder"
wx.Frame.__init__(self, None, -1, APP_TITLE)
self.SetSize(self.width, self.height)
self.SetBackgroundColour((209,249,255)) # 设置界面的背景颜色
# 音乐列表有关
self.local_music_name_list = [] # 当前音乐名字列表
self.lyrcis_static_text = [] # 当前播放的音乐的歌词列表
self.play_stop_button = None # 播放、暂停按钮
self.current_music_state = 0 # 是否有音乐在播放，0表示否
self.current_music_index = 0 # 当前音乐的索引
# 初始化本地歌曲列表
self.get_local_music_list()
self.current_music_static_text = None # 当前播放的音乐的名字
# 按钮使用的图片
self.play_bmp = wx.Image("resources/play1.bmp", wx.BITMAP_TYPE_BMP).Rescale(30, 30).ConvertToBitmap()
self.stop_bmp = wx.Image("resources/stop.bmp", wx.BITMAP_TYPE_BMP).Rescale(30, 30).ConvertToBitmap()
# 导航栏所在的panel
self.navi_panel = None
self.draw_navi_panel()
# 歌曲列表所在的panel
self.music_list_panel = None
self.draw_music_list_panel()
# 播放部分所在的panel
self.play_music_panel = None
self.draw_play_music_panel()
# 歌词部分所在的panel
self.music_lyric_panel = None
self.draw_music_lyric_panel()
# 下载音乐面板
self.down_music_panel = None
self.input_url_text_ctrl = None # 输入的下载路径
self.down_button = None # 下载按钮
self.draw_down_music_panel()
pygame.mixer.init()
self.music = pygame.mixer.music
self.SONG_FINISHED = pygame.USEREVENT + 1
def get_path_by_name(self, file_name):
'''
通过名称获取音乐的完整路径
:return:
'''
return os.path.join(self.local_music_folder, file_name)
def get_local_music_list(self):
'''
获取本地音乐列表
:return:
'''
self.local_music_name_list.clear() # 这一步必须有
for local_music_file_name in os.listdir(self.local_music_folder):
if local_music_file_name.endswith(".mp3"):
self.local_music_name_list.append(local_music_file_name)
def draw_navi_panel(self):
# 导航栏所在的panel
self.navi_panel = wx.Panel(self, id=-1, pos=(0, 0), size=(100, self.height - 100))
# 本地音乐
local_music_text = wx.StaticText(self.navi_panel, -1, "本地音乐", pos=(20, 20), style=wx.ALIGN_LEFT)
local_music_text.SetOwnForegroundColour((0,0,0))
def draw_music_list_panel(self):
'''
绘制音乐列表所在的panel
:param draw:
:param show:
:return:
'''
# 重新计算本地音乐列表
self.get_local_music_list()
# 绘制面板整体
if self.music_list_panel is not None:
self.music_list_panel.Destroy()
self.music_list_panel = wx.Panel(self, id=-1, pos=(100, 0), size=(300, self.height - 100))
# 音乐列表
local_music_num = len(self.local_music_name_list)
for music_index in range(local_music_num):
music_full_name = self.local_music_name_list[music_index].replace(".mp3", "")
if len(music_full_name) > MAX_MUSIC_NAME_LEN:
music_full_name = music_full_name[0:MAX_MUSIC_NAME_LEN] + "..."
music_text = wx.StaticText(self.music_list_panel, -1, music_full_name,
pos=(0, music_index * 40 + 20), size=(270, 30), style=wx.ALIGN_RIGHT)
music_text.SetOwnForegroundColour((0,0,0))
music_text.Refresh() # 这句话不能少
play_button = wx.BitmapButton(self.music_list_panel, -1, self.play_bmp, pos=(280, music_index * 40 + 20),
size=(20, 20))
play_button.Bind(wx.EVT_LEFT_DOWN, lambda e, index=music_index: self.play_index_music(index))
def draw_play_music_panel(self):
# 播放音乐所在的panel
self.play_music_panel = wx.Panel(self, id=-1, pos=(0, self.height - 100), size=(self.width, 100))
# 歌的名字
self.current_music_static_text = wx.StaticText(self.play_music_panel, -1, "请选择歌曲",
pos=(100, 15), size=(200, 30), style=wx.ALIGN_RIGHT)
self.current_music_static_text.SetOwnForegroundColour((0,0,0))
last_music_bpm = wx.Image("resources/last_music.bmp", wx.BITMAP_TYPE_BMP).Rescale(30, 30).ConvertToBitmap()
next_music_bpm = wx.Image("resources/next_music.bmp", wx.BITMAP_TYPE_BMP).Rescale(30, 30).ConvertToBitmap()
last_music_button = wx.BitmapButton(self.play_music_panel, -1, last_music_bpm, pos=(340, 15), size=(30, 30))
self.play_stop_button = wx.BitmapButton(self.play_music_panel, -1, self.play_bmp, pos=(380, 15), size=(30, 30))
next_music_button = wx.BitmapButton(self.play_music_panel, -1, next_music_bpm, pos=(420, 15), size=(30, 30))
# 调节音量的按钮
volume_slider = wx.Slider(self.play_music_panel, -1, 0, 0, 100, pos=(500, 15), size=(570, -1), style=wx.SL_HORIZONTAL)
# 上述按钮的监听器
last_music_button.Bind(wx.EVT_LEFT_DOWN, self.play_last_music)
self.play_stop_button.Bind(wx.EVT_LEFT_DOWN, self.play_stop_music)
next_music_button.Bind(wx.EVT_LEFT_DOWN, self.play_next_music)
volume_slider.Bind(wx.EVT_SLIDER, self.change_volume)
def redraw_music_lyric_panel(self, start_index=0):
# 隐藏之前的歌词的每一行
for x in self.lyrcis_static_text:
x.SetLabelText("")
x.Refresh()
# 获取歌词
lyric_list = self.get_lyrics()
# 展示歌词
for lyric_index in range(start_index, start_index + MAX_LYRIC_ROW, 1):
if lyric_index < len(lyric_list):
lyric_relative_index = lyric_index - start_index
lyric = lyric_list[lyric_index]
self.lyrcis_static_text[lyric_relative_index].SetLabelText(lyric)
self.lyrcis_static_text[lyric_relative_index].SetOwnForegroundColour((0,0,0))
self.lyrcis_static_text[lyric_relative_index].Refresh()
def draw_music_lyric_panel(self):
'''
歌词所在的面板的控制
:return:
'''
self.music_lyric_panel = wx.Panel(self, id=-1, pos=(400, 60), size=(self.width - 400, self.height - 160))
# 获取歌词
lyric_list = self.get_lyrics()
# 展示歌词
for lyric_index in range(MAX_LYRIC_ROW):
if lyric_index < len(lyric_list):
lyric = lyric_list[lyric_index]
else:
lyric = ""
lyric_row = wx.StaticText(self.music_lyric_panel, -1, lyric, pos=(300, 37 * lyric_index + 10),
size=(200, -1), style=wx.ALIGN_CENTER_HORIZONTAL)
lyric_row.SetOwnForegroundColour((0,0,0))
self.lyrcis_static_text.append(lyric_row)
def draw_down_music_panel(self):
'''
下载音乐所在的面板
:return:
'''
self.down_music_panel = wx.Panel(self, id=-1, pos=(400, 0), size=(self.width - 400, 60))
# 下载地址输入框
self.input_url_text_ctrl = wx.TextCtrl(self.down_music_panel, -1, "请输入下载链接", pos=(100, 20), size=(600, 30))
#self.input_url_text_ctrl.SetOwnBackgroundColour((63, 63, 63))
# 绘制下载图标
down_bmp = wx.Image("resources/down.bmp", wx.BITMAP_TYPE_BMP).Rescale(30, 30).ConvertToBitmap()
self.down_button = wx.BitmapButton(self.down_music_panel, -1, down_bmp, pos=(700, 20), size=(30, 30))
# 监听下载图标按钮的鼠标点击事件
self.down_button.Bind(wx.EVT_LEFT_DOWN, self.download_music)
def get_lyric_path(self):
current_music_path = self.get_path_by_name(self.local_music_name_list[self.current_music_index])
lyric_path = current_music_path.replace(".mp3", ".lrc")
if os.path.exists(lyric_path):
return lyric_path
else:
return None
def play_music(self):
'''
重新载入，播放音乐
:return:
'''
current_music_path = self.get_path_by_name(self.local_music_name_list[self.current_music_index])
self.music.load(current_music_path)
# step1：播放音乐
self.music.play(loops=1, start=0.0)
# step2：重写歌词面板
self.redraw_music_lyric_panel()
# step3：开启新线程，追踪歌词
self.display_lyric()
self.current_music_state = 1
self.play_stop_button.SetBitmap(self.stop_bmp)
# 更改当前播放的音乐的名字
current_music_name = self.local_music_name_list[self.current_music_index].replace(".mp3", "")
if len(current_music_name) > MAX_MUSIC_NAME_LEN:
current_music_name = current_music_name[0:MAX_MUSIC_NAME_LEN] + "..."
self.current_music_static_text.SetLabelText(current_music_name)
def play_index_music(self, music_index):
'''
播放指定索引的音乐
:return:
'''
self.current_music_index = music_index
# 载入音乐
self.play_music()
def play_stop_music(self, evt):
if self.music.get_busy(): # 有音乐在播放，需要暂停，或者音乐暂停中
if 1 == self.current_music_state:
print("有音乐在播放，需要暂停")
self.music.pause()
self.current_music_state = 0
self.play_stop_button.SetBitmap(self.play_bmp)
else: # 恢复暂停的音乐
self.music.unpause()
self.current_music_state = 1
self.play_stop_button.SetBitmap(self.stop_bmp)
else: # 重新载入音乐
self.play_music()
def play_last_music(self, evt):
# 计算上一首音乐的名字和路径
if self.current_music_index > 0:
self.play_index_music(self.current_music_index - 1)
else:
self.play_index_music(0)
def play_next_music(self, evt):
# 计算下一首音乐的名字和路径
if self.current_music_index < len(self.local_music_name_list) - 1:
self.play_index_music(self.current_music_index + 1)
else:
self.play_index_music(len(self.local_music_name_list) - 1)
def change_volume(self, evt):
'''
修改音量
:param evt:
:return:
'''
obj = evt.GetEventObject()
val = obj.GetValue()
self.volume = float(val / 100)
self.music.set_volume(self.volume)
def get_lyrics(self):
'''
读取歌词，不带时间标记
:param lyrics_file_path:
:return:
'''
current_lyric_path = self.get_lyric_path()
if current_lyric_path is None or not os.path.exists(current_lyric_path):
return ["暂无歌词"]
with open(current_lyric_path, 'r', encoding="utf-8") as file_pointer:
content_list = file_pointer.readlines()
lyrics_list = []
for content in content_list:
if re.match(LYRIC_ROW_REG, content):
# 找到]符号第一次出现的地方
index_of_right_blank = content.index(']')
lyric_clause = content.replace('\n', '')[index_of_right_blank + 1:]
lyrics_list.append(lyric_clause)
return lyrics_list
def display_lyric(self):
lyric_refersh_thread = Thread(target=self.refersh_lyrics)
lyric_refersh_thread.start()
def parse_lyrics(self):
current_lyric_path = self.get_lyric_path()
if current_lyric_path is None or not os.path.exists(current_lyric_path):
content_list = ["[00:00.00]暂无歌词"]
else:
# 读文件内容
with open(current_lyric_path, 'r', encoding="utf-8") as file_pointer:
content_list = file_pointer.readlines()
lyrics_list = []
for content in content_list:
if re.match(LYRIC_ROW_REG, content):
time_lyric = dict()
start_time = float(content[1:3]) * 60 + float(content[4:6]) + float(content[7:9]) / 100
index_of_right_blank = content.index(']')
time_lyric[start_time] = content.replace('\n', '')[index_of_right_blank + 1:]
lyrics_list.append(time_lyric)
return lyrics_list
def refersh_lyrics(self):
'''
刷新歌词子线程
:return:
'''
lyrics_time_dict_list = self.parse_lyrics()
relative_start_index = 0 # 相对起始歌词索引
while self.music.get_busy(): # 播放中
current_time = float(self.music.get_pos() / 1000)
for lyric_index, lyrics_time_dict in enumerate(lyrics_time_dict_list):
lyric_time = list(lyrics_time_dict.keys())[0]
if math.fabs(lyric_time - current_time) < 0.7:
# 当歌词已经超过底部了，则刷新歌词面板，展示第二页的歌词
if lyric_index > 0 and lyric_index % MAX_LYRIC_ROW == 0:
relative_start_index = lyric_index
self.redraw_music_lyric_panel(start_index=relative_start_index)
self.lyrcis_static_text[lyric_index - relative_start_index].SetOwnForegroundColour((227, 62, 51))
# 这句话千万不能少，少了颜色不会刷新（来自调试了4个小时的忠告）
self.lyrcis_static_text[lyric_index - relative_start_index].Refresh()
break
time.sleep(1)
def download_music(self, evt):
'''
下载音乐
:param evt:
:return:
'''
# 获取文本框中输入的下载地址
music_down_url = self.input_url_text_ctrl.GetValue()
# 给下载的音乐在本地确定一个存储地址
down_music_path = os.path.join(self.local_music_folder, datetime.datetime.now().strftime('%Y-%m-%d-%H-%M-%S') + ".mp3")
before_music_name = self.local_music_name_list[self.current_music_index]
# 开始下载
urllib.request.urlretrieve(music_down_url, down_music_path)
# 下载完成后，重新绘制音乐列表面板
self.draw_music_list_panel()
# 调整当前音乐的索引
for index in range(len(self.local_music_name_list)):
if before_music_name == self.local_music_name_list[index]:
self.current_music_index = index
if __name__ == "__main__":
app = wx.App()
frame = mainFrame()
frame.Show()
app.MainLoop()pygame 1.9.6
Hello from the pygame community. https://www.pygame.org/contribute.html
An exception has occurred, use %tb to see the full traceback.
SystemExit: Unable to access the X Display, is $DISPLAY set properly?
/usr/local/lib/python3.6/site-packages/IPython/core/interactiveshell.py:3334: UserWarning: To exit: use 'exit', 'quit', or Ctrl-D.
warn("To exit: use 'exit', 'quit', or Ctrl-D.", stacklevel=1)
根据音乐播放器的案例，完成如下的练习题：
1.试着调整一下播放器的整体色调，将背景改为浅色，文字改为深色，具体颜色不做规定，挑选一些你喜欢的颜色吧。
2.请将歌词部分的文字，调整为一次展示15行。
3.在歌曲列表面板和播放面板中，展示的歌曲的名字带有.mp3的结尾，请去掉这个结尾。
4.请将默认的音量大小改为0。
（附加题）5.根据音乐播放器的相关内容，尝试的做一个小说阅读器，支持TXT等文本和图像。
（代码如上）
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