无法关闭X按钮上的多线程Tkinter应用 [英] Cannot close multithreaded Tkinter app on X button

问题描述

我的应用具有以下结构:

My app has the following structure:

import tkinter as tk
from threading import Thread

class MyWindow(tk.Frame):
    ...  # constructor, methods etc.

def main():
    window = MyWindow()
    Thread(target=window.mainloop).start()
    ...  # repeatedly draw stuff on the window, no event handling, no interaction

main()

该应用程序运行正常，但是如果我按X(关闭)按钮，它将关闭窗口，但不会停止该过程，有时甚至会抛出TclError.

The app runs perfectly, but if I press the X (close) button, it closes the window, but does not stop the process, and sometimes even throws a TclError.

编写这样的应用程序的正确方法是什么?如何以线程安全的方式或没有线程的方式编写它?

What is the right way to write an app like this? How to write it in a thread-safe way or without threads?

推荐答案

主事件循环应在主线程中，绘图线程应在第二个线程中.

Main event loop should in main thread, and the drawing thread should in the second thread.

编写此应用的正确方法如下:

The right way to write this app is like this:

import tkinter as tk
from threading import Thread

class DrawingThread(Thread):
    def __init__(wnd):
        self.wnd = wnd
        self.is_quit = False

    def run():
        while not self.is_quit:
            ... # drawing sth on window

    def stop():
        # to let this thread quit.
        self.is_quit = True

class MyWindow(tk.Frame):
    ...  # constructor, methods etc.
    self.thread = DrawingThread(self)
    self.thread.start()

    on_close(self, event):
        # stop the drawing thread.
        self.thread.stop()

def main():
    window = MyWindow()
    window.mainloop()

main()

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