在应用仍处于运行状态时更改 Tkinter 标签运行

Question

在其他帖子中找不到我的问题的确切答案。我正在寻找的是更新标签的方法，而我的另一个功能是运行ning。我尝试先更改标签，然后调用 my_function()，但标签仍然没有更新，但是 my_function() 是运行ning 并在终端中打印结果。我是 Tkinter 的新手，据我所知，虽然我们没有点击 window.mainloop() 我的标签不会更新。有什么方法可以在其他功能运行ning 时更新标签？

import os
import tkinter as tk
from tkinter import END, Label, Scrollbar, Text, filedialog

def my_function(directory: str) -> None:
    for item in os.scandir(directory):
        if item.is_file:
            # print(f'File name: {item.name}')
            text_area.insert(END, f'File name: {item.name}\n')


def select_folder() -> None:
    '''
    Tkinter function for button,
    user can select folder.
    '''

    path = filedialog.askdirectory()
    status.config(text='Status: Work in progress, please wait!')
    text_area.insert(END, 'Visited folders:\n')
    my_function(path)
    status.config(text='Status: Done!')


# Start the app window
window = tk.Tk()
window.title('PDF maker')
window.geometry('400x400')

# Status Label
status = Label(window, text='Status: Select the folder')
status.pack()

# Button for selecting folder
button = tk.Button(window, text='Select Folder', command=select_folder)
button.pack(side='bottom', pady=30)

# Horizontal and Vertical Scrollbars
v_s = Scrollbar(window)
v_s.pack(side='right', fill='y')

h_s = Scrollbar(window, orient='horizontal')
h_s.pack(side='bottom', fill='x')

# Text area for result output
text_area = Text(
    window,
    wrap='none',
    font=('Times New Roman', 13),
    yscrollcommand=v_s.set,
    xscrollcommand=h_s.set
)
text_area.pack(padx=10, pady=10, expand=True, fill='both')

# Adding scrollability to text
v_s.config(command=text_area.yview)
h_s.config(command=text_area.xview)

window.mainloop()

更新

还是应该为一个按钮创建两个功能？第一个函数将更改标签和文本，第二个函数将运行 my_func().

Answer 1

一如既往，答案很简单。

试试这个：

#...
def select_folder() -> None:
    """
    Tkinter function for button,
    user can select folder.
    """
    status.config(text="Status: Work in progress, please wait!") # switched lines here
    path = filedialog.askdirectory()
    text_area.insert(END, "Visited folders:\n")
    my_function(path)
    status.config(text="Status: Done!")

#...

以前它没有按预期工作，因为 filedialog.askdirectory() 阻止了 program-flow（类似于 input()）。

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