tkinter:调用消息框后无法输入 [英] tkinter: No input possible after messagebox is called

问题描述

我想在程序开始时调用一个消息框(带有messagebox.showwarning)，以通知用户某些信息.当用户点击确定"时，GUI打开.用户可以在那里输入.

I want to call a messagebox (with messagebox.showwarning) at the start of my program to inform the user about something. When the user clicks on "Ok", a GUI opens. There the user can make inputs.

问题:显示警告后无法输入.没有警告窗口，输入即可正常工作.

Problem: No input is possible after the warning is displayed. Without the warning window the input works without any problems.

用户可以提供输入解决方案吗?

Is there a solution that the user can provide input?

我在此处包括了一个代码段:

I have included a code snippet here:

import tkinter as tk
from tkinter import *
from tkinter import messagebox

root = tk.Tk()
root.geometry('420x100')

# Input doesn't work after the messagebox
messagebox.showwarning("Warning", "Some Serious Warning.")

# Label
li = Label(root, text="Input 1")
li.grid(row=0, column=0)
li = Label(root, text="Input 2")
li.grid(row=0, column=2)
li = Label(root, text="Dropdown")
li.grid(row=1, column=0)
li = Label(root, text="Input 3")
li.grid(row=1, column=2)

# Input
url_text = StringVar()
e1 = Entry(root, textvariable=url_text)
e1.grid(row=0, column=1)

# Dropdown Menu
OptionList = [
    "1",
    "2",
    "3"
]
input1 = StringVar()
input1.set(OptionList[0])
e3 = tk.OptionMenu(root, input1, *OptionList)
e3.config(width=12, font=('Helvetica', 9))
e3.grid(row=1, column=1)

input2 = StringVar()
e2 = Entry(root, textvariable=input2)
e2.grid(row=0, column=3)

input3 = StringVar()
e4 = Entry(root, textvariable=input3)
e4.grid(row=1, column=3)

# Button
b1 = Button(root, text="Run", width=12)
b1.grid(row=2, column=1)

b2 = Button(root, text="Help", width=12)
b2.grid(row=2, column=2)

b3 = Button(root, text="Exit", width=12)
b3.grid(row=2, column=3, pady=(10, 10))

root.mainloop()

推荐答案

在显示消息之前，您需要调用 root.wait_visibility()或 root.update()框:

You need to call root.wait_visibility() or root.update() before showing the message box:

root.wait_visibility()  # or root.update()
messagebox.showwarning("Warning", "Some Serious Warning.")

或在显示消息框后使用 foucs_force()获得焦点:

Or get the focus using foucs_force() after showing the message box:

messagebox.showwarning("Warning", "Some Serious Warning.")
root.focus_force()

这篇关于tkinter:调用消息框后无法输入的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！