为什么Toplevel显示2个窗口? [英] Why is Toplevel showing 2 windows?

问题描述

我正在尝试创建一个tkinter应用程序，该应用程序在第一个窗口(根)关闭时不会关闭所有内容(其他窗口).我试过使用Toplevel()，它非常适合其他程序中的弹出窗口，但不能用于创建基本级别.

I am trying to make a tkinter application which doesn't close everything (other windows) when the first window (root) is closed. I have tried to use Toplevel() which works perfectly for pop-up windows in other programs but not for making a base level.

from tkinter import *

top = Toplevel(bg='red')

top.mainloop()

我不知道这是否可行，或者我不知道是否可以更改Tk()的属性以使其不关闭其他所有窗口.

I don't know if this is possible or I don't know if I can change the Tk()'s properties to make it so it doesn't shut all other windows down.

推荐答案

将显示两个窗口，因为创建tkinter小部件时，它也会强制创建Tk实例以及每个小部件，除非parent是显式传递的，是自动创建的Tk实例的子代.因此，您的代码本质上模仿了以下代码:

There are two windows getting displayed because when a tkinter widget is created, it forces a Tk instance to be created as well, and every widget, unless a parent is explicitly passed, is a child to that automatically created Tk instance. So your code essentially mimics the following code:

from tkinter import *

root = Tk()

top = Toplevel(root, bg='red')

root.mainloop()

现在有一些方法可以解决您想要的行为，一种方法是隐藏实际的Tk实例:

Now there are some ways to work around that for the behavior you want, one is to hide the actual Tk instance:

import tkinter as tk

root = tk.Tk()
root.withdraw()

top = tk.Toplevel(root, bg='red')

#to display root window again
#root.iconify()
#root.deiconify()
root.mainloop()

---

另一种方法是否决root本身的删除，但是我怀疑这实际上是您想要的:

---

Another way would be to overrule the deletion of the root itself, but I doubt that's actually what you want:

import tkinter as tk


def callback():
    print("Won't close")

root = tk.Tk()

root.protocol("WM_DELETE_WINDOW", callback)

root.mainloop()

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