如何防止我的主窗口在 python 和 Tkinter 中使用 Toplevel 窗口运行？

Question

我试图阻止主窗口运行，直到在单独的顶层窗口上按下按钮。

例子：

from tkinter import *

let_user_through = False

window = Tk()

def activate_main_window():
    global let_user_through
    let_user_through = True

frame = Toplevel()
b = Button(frame, text="Enter", command=activate_main_window).pack()


if let_user_through == True:
    lbl = Label(window, text="Hello")
    #bunch of code
    #bunch of code


window.mainloop()

在这个例子中，在主窗口中有一个标签，上面写着：“你好”。 但我不希望人们如果没有按下框架上的按钮就可以看到它

一旦用户按下按钮，框架将自行销毁，主窗口将继续执行一堆代码。

我是 tkinter 的初学者，所以我不确定答案是否显而易见。谢谢！

Answer 1

您可以使用frame.wait_window() 等到frame 被销毁。您还需要在activate_main_window() 中调用frame.destroy()。

from tkinter import *

let_user_through = False

window = Tk()

def activate_main_window():
    global let_user_through
    let_user_through = True
    frame.destroy() # need to destroy frame

# wait for root window becomes visible
# otherwise "frame" may be open behind root window
window.wait_visibility()
frame = Toplevel()
Button(frame, text="Enter", command=activate_main_window).pack()

frame.grab_set() # capture keyboard/mouse events
frame.wait_window() # wait for "frame" to be destroyed

if let_user_through:
    Label(window, text="Hello").pack()
    #bunch of code
    #bunch of code

# should it be within the above for loop?
window.mainloop()

Answer 2

使用window.withdraw 和window.deiconify 对您的代码进行小改动对我有用。 @acw1668 正确指出了我原始代码中的一个错误，所以这里是修复。

在用户按下按钮之前，您的主窗口是不可见的。

import tkinter as tk

let_user_through = False

window = tk.Tk()
window.withdraw()

def activate_main_window():
    global let_user_through
    let_user_through = True
    frame.destroy() # need to destroy frame

frame = tk.Toplevel()
tk.Button(frame, text="Enter", command=activate_main_window).pack()

frame.wait_window() # wait for "frame" to be destroyed

if let_user_through:
    tk.Label(window, text="Hello").pack()
    window.update()
    window.deiconify()
    
    #bunch of code
    #bunch of code

window.mainloop()

我创建了一个class，不再需要let_user_through，并为任何后续步骤设置代码。

import tkinter as tk

class invisible:

    def __init__( self ):

        self.window = tk.Tk()
        self.window.withdraw() # make window invisible

        self.frame = tk.Toplevel()
        tk.Button(
            self.frame, text = "Enter", command = self.activate_main_window ).pack( fill='both' )
        self.frame.wait_window( ) # wait for "frame"

        self.button = tk.Button( self.window, text = "Hello", command = self.remove_next )
        self.button.pack( fill = 'both')
        self.window.update()
        self.window.deiconify() # make window visible

    def activate_main_window( self ):

        self.frame.destroy() # need to destroy frame

    def remove_next( self ):

        self.button.destroy()

        tk.Label( self.window, text = "Bunch of codeA" ).pack( fill = 'both' )
        tk.Label( self.window, text = "Bunch of codeB" ).pack( fill = 'both' )
        tk.Label( self.window, text = "Bunch of codeC" ).pack( fill = 'both' )
        # continue code initialization

if __name__ == '__main__':

    make = invisible()
    tk.mainloop()