experimental.py

from threading import Thread
from tkinter import Tk
from tkinter.ttk import Progressbar
from queue import Queue


class ProgressDialog(object):

    def __init__(self, name, maximum):
        self._dialog = Tk()
        self._max = maximum
        self._set_properties(name)
        self._add_progress_bar()

    def _set_properties(self, name):
        self._dialog.geometry('420x42+-10+0')
        self._dialog.title(name)
        self._dialog.resizable(0, 0)
        self._dialog.bind('<Escape>', self._close)

    def _add_progress_bar(self):
        self._progressbar = Progressbar(self._dialog, length=400, maximum=self._max)
        self._progressbar.pack()
        self._progressbar.pack(pady=10)

    def _set_progress(self, value):
        self._progressbar['value'] = value

    progress = property(fset=_set_progress)

    def show(self):
        self._dialog.focus_force()
        self._dialog.after(100, self._poll)
        self._dialog.mainloop()

    def _poll(self):
        if self._progressbar['value'] >= self._max:
            self._close()
        self._dialog.after(100, self._poll)

    def _close(self, event=None):
        self._dialog.quit()


def progress_dialog_async(*args, **kwargs):
    progress_dialog_queue = Queue()

    def create_progress_dialog():
        progress_dialog = ProgressDialog(*args, **kwargs)
        progress_dialog_queue.put(progress_dialog)
        progress_dialog.show()

    Thread(target=create_progress_dialog).start()
    return progress_dialog_queue.get()


if __name__ == '__main__':
    import time

    dialog = progress_dialog_async('blah', 100)
    for i in range(1, 101):
        dialog.progress = i
        time.sleep(.02)