def __init__(self):

import time
import threading
from gi.repository import Gtk, GLib, GObject
class ProgressBarWindow(Gtk.Window):
    def __init__(self):
        Gtk.Window.__init__(self, title="ProgressWin")
        self.set_border_width(20)
        self.connect("delete-event", self.del_progress, 1)
        vbox = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=6)
        self.add(vbox)
        self.progressbar = Gtk.ProgressBar()
        vbox.pack_start(self.progressbar, True, True, 0)
        self.show_all()
        threading.Thread(target=Gtk.main).start()
    def del_progress(self, *args):
        if args[2] == 1:
            self.destroy()
    def on_activity(self, *args):
        self.progressbar.set_fraction(args[0])
class TopWindow(Gtk.Window):
    def __init__(self):
        Gtk.Window.__init__(self, title="TopWin")
        self.s = ProgressBarWindow()
        time.sleep(1)
        GLib.idle_add(self.s.on_activity, 0.20)
        self.connect("delete-event", self.close_main_window, 2)
        time.sleep(1)
        GLib.idle_add(self.s.on_activity, 0.40)
        self.set_border_width(5)
        time.sleep(1)
        GLib.idle_add(self.s.on_activity, 0.60)
        self.set_default_size(200, 150)
        time.sleep(1)
        GLib.idle_add(self.s.on_activity, 0.80)
        self.spinner = Gtk.Spinner()
        self.spinner.start()
        time.sleep(1)
        GLib.idle_add(self.s.on_activity, 1.00)
        self.add(self.spinner)
        self.show_all()
        self.s.destroy()
    def close_main_window(self, *args):
        if args[2] == 2:
            Gtk.main_quit()
GObject.threads_init()
TopWindow()