我想要一个带有进度条和一些输入，标签和按钮小部件的顶层窗口/对话框。我希望对话框从main_window窗口更新。 main_window完成工作，我需要在对话框中反映出来。我希望主窗口保持活动状态，以便您可以停止该过程。我也希望能够在对话框中停止该过程。
如果不使用多处理和线程处理，我将无法正常工作。看来我正在以错误的方式进行操作，还是我？另外，我还是多处理和线程技术的新手，所以我还是希望我能正确地做到这一点。如果有人知道更好的方法，请告诉我。
下面是我尝试做自己想做的事，它可以工作，但这是正确的方法吗？
import tkinter as tk
import tkinter.ttk as ttk
from time import sleep
from queue import Empty
from threading import Thread
from multiprocessing import Process, Queue
HIDE = -1
STOP = -2
BREAK = -3
PAUSE = -4
RESUME = -5
class App(tk.Tk):
def __init__(self, **kwargs):
title = kwargs.pop('title', '')
theme = kwargs.pop('theme', 'clam')
geometry = kwargs.pop('geometry', None)
exit_callback = kwargs.pop('exit_callback', None)
super().__init__(**kwargs)
self.title(title)
self.style = ttk.Style()
self.style.theme_use(theme)
if geometry:
self.geometry(geometry)
if exit_callback:
self.protocol('WM_DELETE_WINDOW', exit_callback)
def main_window(out_que, in_que, maximum):
def worker():
if app.running:
return
app.running = True
app.finished = False
for count in range(0, maximum + 1):
try:
message = in_que.get_nowait()
if message:
if message == PAUSE:
message = in_que.get()
if message == BREAK:
break
elif message == STOP:
app.destroy()
except Empty:
pass
sleep(0.1) # Simulate work.
out_que.put(count)
app.running = False
app.finished = True
start_btn.config(state=tk.NORMAL)
def app_stop():
out_que.put(STOP)
app.destroy()
def test_stop():
if app.running:
out_que.put(HIDE)
elif app.finished:
out_que.put(HIDE)
in_que.get()
stop_btn.config(state=tk.DISABLED)
start_btn.config(state=tk.NORMAL)
def test_start():
while not in_que.empty():
in_que.get()
stop_btn.config(state=tk.NORMAL)
start_btn.config(state=tk.DISABLED)
thread = Thread(target=worker, daemon=True)
thread.daemon = True
thread.start()
app = App(title='Main Window', theme='alt', geometry='350x150', exit_callback=app_stop)
app.running = False
app.finished = True
app.rowconfigure(0, weight=1)
app.rowconfigure(1, weight=1)
app.columnconfigure(0, weight=1)
start_btn = ttk.Button(app, text='Start Test', command=test_start)
start_btn.grid(padx=10, pady=5, sticky=tk.NSEW)
stop_btn = ttk.Button(app, text='Stop Test', state=tk.DISABLED, command=test_stop)
stop_btn.grid(padx=10, pady=5, sticky=tk.NSEW)
app.mainloop()
def progress_window(in_que, out_que, maximum):
def hide():
out_que.put(BREAK)
pause_btn.config(text='Pause')
app.withdraw()
def pause():
if progress_bar['value'] < progress_bar['maximum']:
text = pause_btn.cget('text')
text = 'Resume' if text == 'Pause' else 'Pause'
pause_btn.config(text=text)
out_que.put(PAUSE)
else:
pause_btn.config(text='Pause')
def worker():
while True:
data = in_que.get()
print(data)
if data == HIDE:
hide()
elif data == STOP:
app.destroy()
out_que.put(STOP)
break
elif not data:
app.deiconify()
progress_bar["value"] = 0
else:
progress_bar["value"] = data
app.update_idletasks()
app = App(title='Progress', theme='clam', geometry='350x150', exit_callback=hide)
app.rowconfigure(0, weight=1)
app.rowconfigure(1, weight=1)
app.columnconfigure(0, weight=1)
app.columnconfigure(1, weight=1)
progress_bar = ttk.Progressbar(app, orient=tk.HORIZONTAL, mode='determinate')
progress_bar["maximum"] = maximum
progress_bar.grid(padx=10, sticky=tk.EW, columnspan=1000)
pause_btn = ttk.Button(app, text='Pause', command=pause)
pause_btn.grid()
cancel_btn = ttk.Button(app, text='Cancel', command=hide)
cancel_btn.grid(row=1, column=1)
thread = Thread(target=worker)
thread.daemon = True
thread.start()
app.withdraw()
app.mainloop()
if __name__ == '__main__':
jobs = []
que1 = Queue()
que2 = Queue()
process = 50 # The maximum amount of work to process, # items.
for target in (main_window, progress_window):
p = Process(target=target, args=(que1, que2, process))
jobs.append(p)
p.start()
for j in jobs:
j.join()
老实说，我认为您做得正确。我测试了所有代码，而且似乎可以正常工作。我唯一要说的是将主线程用于UI并仅在必要时创建工作线程。