Modern Python Standard Library Cookbook

How to do it...

The simpledialog.SimpleDialog widget is used to create simple dialogs with some text and buttons. We are going to leverage it to display a progress bar instead of the buttons:

import tkinter
from tkinter import simpledialog
from tkinter import ttk

from queue import Queue

class ProgressDialog(simpledialog.SimpleDialog):
    def __init__(self, master, text='', title=None, class_=None):
        super().__init__(master=master, text=text, title=title,  class_=class_) self.default = None self.cancel = None self._bar = ttk.Progressbar(self.root, orient="horizontal", length=200, mode="determinate") self._bar.pack(expand=True, fill=tkinter.X, side=tkinter.BOTTOM) self.root.attributes("-topmost", True) self._queue = Queue() self.root.after(200, ...