Поместите цифровые часы в окно pygtk

Привет,

У меня есть этот код для цифровых часов с TKinter:

#!/usr/bin/python

# -*- coding: utf-8 -*-



import Tkinter

import time



def tick(time_old, clock):

    # get the current local time from the PC

    time_now = time.strftime('%H:%M:%S')

    # if time string has changed, update it

    if time_now != time_old:

        time_old = time_now

        clock.config(text = time_now)

    # calls itself every 200 milliseconds

    # to update the time display as needed

    # could use >200 ms, but display gets jerky

    clock.after(200, tick, time_old, clock)



def main():

    root = Tkinter.Tk()

    clock = Tkinter.Label(root, font=('times', 20, 'bold'), bg='green')

    clock.pack(fill=Tkinter.BOTH, expand=1)

    tick("", clock)

    root.mainloop()



if __name__ == "__main__":

    main()

Вопрос в том, как я мог бы поставить TKinter.метка, центрированная в окне pygtk (в label2) (или glade)?

Код окна:

#!/usr/bin/python

# -*- coding: utf-8 -*-



import pygtk

pygtk.require("2.0")

import gtk

import gtk.glade



class Principal:

    def __init__(self):    

        self.gladefile = "ejemplo.glade"

        self.glade = gtk.Builder()

        self.glade.add_from_file(self.gladefile)

        label2 = self.glade.get_object("label2")

        window = self.glade.get_object("ventana")

        window.set_keep_above(True)

        window.show_all()

        self.glade.connect_signals(self)  



    def on_ventana_delete_event(self, widget, event):

        gtk.main_quit()



    def on_boton_clicked(self, widget):

        self.glade.get_widget('label1').set_text('change title label')



    def on_boton2_clicked(self, widget):

        gtk.main_quit()    





if __name__ == "__main__":

    try:

        a = Principal()

        gtk.main()

    except KeyboardInterrupt:

        pass

Код Поляны:

<?xml version="1.0" encoding="UTF-8"?>

<interface>

  <requires lib="gtk+" version="2.16"/>

  <!-- interface-naming-policy project-wide -->

  <object class="GtkWindow" id="ventana">

    <property name="can_focus">False</property>

    <property name="title" translatable="yes">Ventana Principal</property>

    <property name="resizable">False</property>

    <property name="window_position">center-always</property>

    <property name="default_width">200</property>

    <property name="default_height">100</property>

    <property name="icon">Walker.png</property>

    <signal name="delete-event" handler="on_ventana_delete_event" swapped="no"/>

    <child>

      <object class="GtkHBox" id="hbox1">

        <property name="visible">True</property>

        <property name="can_focus">False</property>

        <child>

          <object class="GtkLabel" id="label1">

            <property name="visible">True</property>

            <property name="can_focus">False</property>

            <property name="ypad">3</property>

            <property name="label" translatable="yes">Acción</property>

          </object>

          <packing>

            <property name="expand">False</property>

            <property name="fill">False</property>

            <property name="position">0</property>

          </packing>

        </child>

        <child>

          <object class="GtkButton" id="boton">

            <property name="label" translatable="yes">Cambiar label</property>

            <property name="visible">True</property>

            <property name="can_focus">True</property>

            <property name="receives_default">True</property>

            <property name="use_action_appearance">False</property>

            <property name="xalign">0.54000002145767212</property>

            <signal name="clicked" handler="on_boton_clicked" swapped="no"/>

          </object>

          <packing>

            <property name="expand">False</property>

            <property name="fill">False</property>

            <property name="position">1</property>

          </packing>

        </child>

        <child>

          <object class="GtkLabel" id="label2">

            <property name="visible">True</property>

            <property name="can_focus">False</property>

            <property name="label" translatable="yes">label</property>

          </object>

          <packing>

            <property name="expand">True</property>

            <property name="fill">True</property>

            <property name="position">2</property>

          </packing>

        </child>

        <child>

          <object class="GtkButton" id="boton2">

            <property name="label" translatable="yes">Salir</property>

            <property name="visible">True</property>

            <property name="can_focus">True</property>

            <property name="receives_default">True</property>

            <property name="use_action_appearance">False</property>

            <signal name="clicked" handler="on_boton2_clicked" swapped="no"/>

          </object>

          <packing>

            <property name="expand">False</property>

            <property name="fill">False</property>

            <property name="position">3</property>

          </packing>

        </child>

      </object>

    </child>

  </object>

</interface>

Спасибо!