python - 将 filedialog.askdirectory() 与 tkinter 和 pyglet 一起使用会冻结应用程序
问题描述
我一直在尝试使用 pyglet 模块创建自己的 GUI mp3 播放器,
当整个 GUI 应用程序冻结时单击“d”按钮 (dir_btn) 时遇到错误,此外,
IDE (pycharm) 不显示任何错误
这是具体的功能:
def add_songs(n=0):
if n == 0:
dir_name=filedialog.askdirectory() #here is where the error occurs
else:
dir_name=''
print("out")
song_list.delete(0, END)
temp=create_songs_list(dir_name)
if len(temp)==0:
song_list.insert(END,"No Songs found...")
else:
for i in temp:
song_list.insert(END, i[len(dir_name) :])
scroll.config(command=song_list.yview)
这是整个代码:
from pyglet import *
from tkinter import *
from tkinter import filedialog
def control_song(event):
global play_btn
if player.source==None:
song_list.unbind('<Double-1>')
song_list.bind('<space>',control_song)
src = media.load(song_list.get(ACTIVE))
player.queue(src)
player.volume = 0.3
if play_btn['text']==' ▶ ':
player.play()
play_btn.configure(text='||')
else:
player.pause()
play_btn.configure(text=' ▶ ')
def add_frames():
global lower_frame
global upper_frame
global left_frame
lower_frame = Frame(window, background="blue")
upper_frame = Frame(window, background="green")
left_frame = Frame(window, background="red")
upper_frame.grid(row=0, column=1, sticky="nsew")
lower_frame.grid(row=1, column=1, sticky="nsew")
left_frame.grid(row=0, column=0, sticky="nsew", rowspan=2)
window.grid_columnconfigure(0, weight=0)
window.grid_columnconfigure(1, weight=3)
window.grid_rowconfigure(0, weight=3)
window.grid_rowconfigure(1, weight=1)
lower_frame.grid_columnconfigure(0, weight=5) # back button frame
lower_frame.grid_columnconfigure(1, weight=1) # play button frame
lower_frame.grid_columnconfigure(2, weight=5) # forward button frame
lower_frame.grid_rowconfigure(0, weight=1) # all 3 control buttons frame
upper_frame.grid_rowconfigure(0,weight=1)
upper_frame.grid_columnconfigure(0,weight=1)
def mod_options():
global options_open
if window.columnconfigure(0)['weight']== 0:
window.grid_columnconfigure(0,weight=1)
else:
window.grid_columnconfigure(0, weight=0)
def add_widgets():
global play_btn
global back_btn
global forward_btn
global triple_btn
global dir_btn
global scroll
global song_list
scroll=Scrollbar(upper_frame) #song list scroll bar
scroll.grid(column=1,sticky='nse')
song_list = Listbox(upper_frame,yscrollcommand=scroll.set)#song list box
song_list.grid(row=0,sticky='nswe')
song_list.bind('<Double-1>',control_song)
back_btn = Button(lower_frame, text="◀◀")# back button
back_btn.grid(column=0,row=0,sticky='e') #
play_btn = Button(lower_frame, text=" ▶ ",command=control_song)#play button
play_btn.grid(column=1,row=0) #
forward_btn_btn = Button(lower_frame, text="▶▶")#forward button
forward_btn_btn.grid(column=2,row=0,sticky='w') #
triple_btn=Button(left_frame,text='≡',command=mod_options)#options button
triple_btn.grid() #
dir_btn=Button(left_frame,text='d',command=add_songs)#options button
dir_btn.grid() #
def create_songs_list(dir_name=''):
s_list=list()
extensions = ["mp3"]
s_list.clear()
if dir_name=='':
lst = os.listdir()
else:
lst = os.listdir(dir_name)
for i in lst:
i_list = str(i).split(".")
if i_list[len(i_list) - 1].lower() in extensions:
s_list.append((dir_name+"/" if dir_name!='' else '')+i)
return s_list
def add_songs(n=0):
if n == 0:
dir_name=filedialog.askdirectory()
else:
dir_name=''
print("out")
song_list.delete(0, END)
temp=create_songs_list(dir_name)
if len(temp)==0:
song_list.insert(END,"No Songs found...")
else:
for i in temp:
song_list.insert(END, i[len(dir_name) :])
scroll.config(command=song_list.yview)
player = media.Player()
window = Tk()
window.title("mp3 player")
window.geometry("500x300")
add_frames()
add_widgets()
add_songs(1)
window.mainloop()
我最好的方法是使用多处理,但只是获取目录似乎需要做很多工作
解决方案
不幸的是 tkinter 有很多阻塞命令,你必须使用线程组合。前段时间我为 Pyglet 做了一个例子,应该很快就会添加。
这是一个工作示例:
from concurrent.futures import ProcessPoolExecutor as _ProcessPoolExecutor
from pyglet.event import EventDispatcher as _EventDispatcher
import os
class _Dialog(_EventDispatcher):
executor = _ProcessPoolExecutor(max_workers=1)
@staticmethod
def _open_dialog():
raise NotImplementedError
def open(self):
future = self.executor.submit(self._open_dialog, self._dialog)
future.add_done_callback(self._dispatch_event)
def _dispatch_event(self, future):
raise NotImplementedError
class FileOpenDialog(_Dialog):
def __init__(self, title="Open File", initial_dir=os.path.curdir, filetypes="", multiple=False):
from tkinter import filedialog
self._dialog = filedialog.Open(title=title,
initialdir=initial_dir,
filetypes=filetypes,
multiple=multiple
)
@staticmethod
def _open_dialog(dialog):
import tkinter as tk
root = tk.Tk()
root.withdraw()
return dialog.show()
def _dispatch_event(self, future):
self.dispatch_event('on_dialog_open', future.result())
def on_dialog_open(self, filename):
"""Event for filename choice"""
pass
class FileSaveDialog(_Dialog):
def __init__(self, title="Save As", initial_dir=os.path.curdir, initial_file="", filetypes="", default_ext=""):
from tkinter import filedialog
self._dialog = filedialog.SaveAs(title=title,
initialdir=initial_dir,
initialfile=initial_file,
filetypes=filetypes,
defaultextension=default_ext,
)
@staticmethod
def _open_dialog(dialog):
import tkinter as tk
from tkinter import filedialog
root = tk.Tk()
root.withdraw()
return dialog.show()
def _dispatch_event(self, future):
self.dispatch_event('on_dialog_save', future.result())
def on_dialog_save(self, filename):
"""Event for filename choice"""
pass
FileOpenDialog.register_event_type('on_dialog_open')
FileSaveDialog.register_event_type('on_dialog_save')
if __name__ == '__main__':
#save_as = FileSaveDialog(initial_file="test", filetypes=[("PNG", ".png"),("24-bit Bitmap", ".bmp")])
#save_as.open()
#@save_as.event
#def on_dialog_save(filename):
# print("FILENAMES ON SAVE!", filename)
open_dialog = FileOpenDialog(filetypes=[("PNG", ".png"),("24-bit Bitmap", ".bmp")], multiple=True)
open_dialog.open()
@open_dialog.event
def on_dialog_open(filename):
print("FILENAMES ON OPEN!", filename)