将Tkinter mainloop与另一个事件侦听器组合 [英] Combining Tkinter mainloop with another event listener

问题描述

我正在尝试构建一个程序，该程序侦听某些按键组合，然后在Tkinter窗口中向用户显示信息.为此，我使用的是这样的按键记录程序(此示例已简化):

I am trying to build a program that listens for certain key combinations and then shows information to the user in a Tkinter window. To do this, I'm using a keylogger like so (simplified for this example):

from pyHook import HookManager
from pythoncom import PumpMessages
import Tkinter as tk

def on_keyboard_event(event):
    label.config(text=event.Key)
    root.update()
    return True

hm = HookManager()
hm.KeyDown = on_keyboard_event
hm.HookKeyboard()
root = tk.Tk()
label = tk.Label(root, text='Hello world')
label.pack()
PumpMessages()

如预期的那样，该窗口会弹出并向用户显示他们按下了什么键.但是，我想集成功能以通过与Tkinter窗口进行交互来显示其他消息，例如通过按一个按钮.但是，似乎我需要Tkinter的mainloop来执行此操作，我无法弄清楚如何与PumpMessages()一起运行，因为它还会暂停类似于mainloop()的代码.

As expected, the window pops up and shows the user what key they pressed. However, I would like to integrate functionality to show other messages by interacting with the Tkinter window, such as by pressing a button. However, it seems I need Tkinter's mainloop to do this, which I can't figure out how to run alongside PumpMessages(), since it also halts the code similar to mainloop().

我尝试在root.after()中运行root.mainloop()，然后尝试像这样重新创建root.mainloop:

I tried running root.mainloop() in a root.after(), and I tried recreating root.mainloop like so:

def mainloop():
    root.update()
    root.after(50, mainloop)

，然后在PumpMessages之前运行它，但是这些解决方案都不起作用.似乎也不能在线程中运行PumpMessages或root.mainloop，尽管我做得不好.如果Tkinter无法做到这一点，那么我是否可以使用其他的Python GUI来使之成为可能?

and then running it right before PumpMessages, but neither of these solutions worked. It also doesn't seem like you can run PumpMessages or root.mainloop in a thread, though I could just not be doing it right. If this is not possible with Tkinter, is there an alternate Python GUI I could use that would make it possible?

推荐答案

您无需创建使用mainloop()的函数，只需将mainloop()放在代码底部即可.如果需要延迟，请使用root.after(milliseconds, function)

You don't need to create a function to use mainloop() so just simply place the mainloop() at the bottom of your code. If you want a delay on it, use root.after(milliseconds, function)

另外，请记住将mainloop()放在PumpMessages()

例如

def mainloopfunction():
    mainloop()

root.after(5000, mainloopfunction)

希望我能帮上忙！

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