Tkinter在尝试关闭时拆分菜单和主窗口

Question

我正在使用Tkinter构建一个基本的文本编辑器。我有一个小的文件菜单，有四个按钮:打开、保存、新建文件和退出。窗口的主要部分用于编辑器，偶尔会弹出一些按钮(保存，打开等)。然而，我有几个问题:1)当我试图关闭主窗口与窗口边界上的退出按钮，它分裂成一个窗口的主窗口和一个小窗口的菜单。一切功能正常，但我必须关闭两个窗口才能终止程序。当我在菜单中使用退出按钮时，这种情况不会发生。2)我的第二个问题与问题标题无关，但我的代码在这里:我有四个项目编码到菜单部分，但只有三个显示。第四种只有在上述现象发生时才会出现。为什么会这样?我该怎么补救呢?

非常感谢!我对这种现象的描述可能不够充分，所以这里有一个我所描述的图片的链接:https://goo.gl/vjwI5X你可以看到右上角的窗口是黑色的(这是主文本编辑器)，但没有菜单——它旁边是菜单，在较小的窗口中，以及当时碰巧打开的所有按钮。

下面是我的代码:

from Tkinter import *
import sys
import menu_config
import tkMessageBox
import error_mes
#Variables that are globally needed
file_input = "" #whats put into the text box
_FILE_= "" #File the user wants to open; readapt to be synonymous with save?
open_a_file = "" #will be the entry field for opening a file
target = ""
new_file_ = ""
new_file_name = ""
def get_from_text():
    global file_input
    try:
        file_input = my_text_box.get("1.0", END)
        print file_input
    except:
        file_input = 'UHOH'
        print file_input
def save():
    global file_input, FILE_, target, _FILE_
    file_input = my_text_box.get("1.0", END)
    target = open(_FILE_, "r+w")
    target.truncate()
    target.write(file_input)
def exit_application():
    sys.exit(0)
def menu_open_file():
    global _FILE_, open_a_file, save
    try:
        open_a_file = Entry()
        open_a_file.grid(row = 3, column = 0)
        open_a_file.insert(0, "Path to File to Open")
        save.grid_forget()
        Button(main, text = "Click to Open", command = get_file).grid(row = 4, 
                                                                    column = 0)
    except:
        #tkMessageBox.showinfo("Error Code 52", "Something went wrong.")
        error_mes.error()
def get_file():
    global _FILE_, open_a_file
    _FILE_ = open_a_file.get()
    target = open(_FILE_, "r+w")
    opened_file = target.read()
    try:
        my_text_box.insert(INSERT, opened_file)
    except:
        tkMessageBox.showinfo("This is wrong", "Something went wrong!")
def new_file():
    global new_file_
    my_text_box.delete(1.0, END)
    try:
        new_file_ = Entry()
        new_file_.grid(row = 3, column = 0)
        new_file_.insert(0, "Path to new file + name")
        Button(main, text = "Click to Save", command = save_new_file).grid(row = 4, 
                                                                    column = 0)
    except:
        tkMessageBox.showinfo("Error Code 52", "Something went wrong.")
def save_new_file():
    global new_file_, new_file_name
    new_file_name = new_file_.get()

my_text_box = Text(bg = "black", fg = "white", insertbackground = "white")
my_text_box.grid(row = 0, column = 0)

def main():
    main = Tk()
    #The Menu
    first_menu = Menu(main)
    main.config(menu = first_menu)
    fileMenu = Menu(first_menu)
    fileMenu.add_command(label = "Open", command = menu_open_file)
    fileMenu.add_command(label = "New File...", command = new_file)
    fileMenu.add_command(label = "Save", command = save)
    fileMenu.add_command(label = "Exit", command = exit_application)
    first_menu.add_cascade(label = "File", menu = fileMenu)
    savebutton = Button(main, text = "Save", command = save)
    savebutton.grid(row = 3, column = 0)
    main.mainloop()
if __name__ == '__main__':
    main()

模块error_mes是我创建的模块…很抱歉造成任何混乱。它对程序没有影响。如果有帮助的话，下面是代码:

import tkMessageBox
def error():
    tkMessageBox.showinfo("Error 52", "Something went wrong.")

Answer 1

问题在于这两行代码:

my_text_box = Text(bg = "black", fg = "white", insertbackground = "white")
my_text_box.grid(row = 0, column = 0)

这几行代码在创建根窗口之前运行。因此，它创建了一个隐式根窗口。之后，执行以下代码:

main = Tk()

上面的命令创建了第二个根窗口，其他所有内容都驻留在这个根窗口中。

解决方案是在创建根窗口之后移动my_text_box的创建，并确保将根窗口作为其父窗口。