如何使 tkinter Toplevel 窗口依赖于另一个 Toplevel 窗口

Question

如果我在 tkinter 应用程序中创建一个顶级弹出窗口，当我关闭主根窗口时，所有子窗口都会关闭。

使用以下代码，如果我打开两个连续的顶层窗口，我可以关闭“窗口一”但“窗口二”保持打开状态。

#!/usr/bin/env python3

import tkinter as tk
import tkinter.ttk as ttk

def main():
    root = tk.Tk()
    root.geometry("600x300")
    root.title("Main Window")
    app = Application(root)
    app.mainloop()

def window_one():
    window_one = WindowOne()
    window_one.geometry("450x200")
    window_one.title('Window One')

def window_two():
    window_two = WindowTwo()
    window_two.geometry("200x100")
    window_two.title('Window Two')


class Application(ttk.Frame):
    
    def __init__(self, master= None, *args, **kwargs):
        super().__init__(master = master)
        self.pack()
        self.create_widgets()
    
    def create_widgets(self):
        button1 = ttk.Button(self, text = "Click Here", command = window_one)
        button1.pack()


class WindowOne(tk.Toplevel):

    def __init__(self, master= None, *args, **kwargs):
        super().__init__(master = master)
        self.create_widgets()
    
    def create_widgets(self):
        button1 = ttk.Button(self, text = "Click Here", command = window_two)
        button1.pack()


class WindowTwo(tk.Toplevel):

    def __init__(self, master= None, *args, **kwargs):
        super().__init__(master = master)
        self.create_widgets()
    
    def create_widgets(self):
        button1 = ttk.Button(self, text = "$$$")
        button1.pack()

if __name__ == "__main__":
    main()

如何编写代码以使窗口二依赖于窗口一，这样如果我关闭“窗口一”，“窗口二”也会关闭，模仿主根窗口的行为？

Answer 1

您可以将Window One 设为Window Two 的父级：

def window_two(parent):
    window_two = WindowTwo(parent) # pass parent to WindowTwo
    window_two.geometry("200x100")
    window_two.title('Window Two')

...

class WindowOne(tk.Toplevel):

    def __init__(self, master= None, *args, **kwargs):
        super().__init__(master = master)
        self.create_widgets()
    
    def create_widgets(self):
        button1 = ttk.Button(self, text = "Click Here", command = lambda: window_two(self)) # pass self to `window_two()`
        button1.pack()

---

更新：如果你想在Window Two被关闭的时候关闭Window One，你可以使用self.protocol("WM_DELETE_WINDOW", ...)：

class WindowTwo(tk.Toplevel):

    def __init__(self, master= None, *args, **kwargs):
        super().__init__(master = master)
        self.create_widgets()
        self.protocol("WM_DELETE_WINDOW", self.on_destroy)
    
    def create_widgets(self):
        button1 = ttk.Button(self, text = "$$$")
        button1.pack()

    def on_destroy(self):
        self.master.destroy() # close parent window
        self.destroy() # close itself

或将<Destroy>事件绑定到回调以关闭父窗口：

class WindowTwo(tk.Toplevel):

    def __init__(self, master= None, *args, **kwargs):
        super().__init__(master = master)
        self.create_widgets()
        self.bind("<Destroy>", self.on_destroy)
    
    def create_widgets(self):
        button1 = ttk.Button(self, text = "$$$")
        button1.pack()

    def on_destroy(self, event):
        self.master.destroy() # close parent window