En la figura se muestra el diseño de la aplicación.
El código se muestra a continuación:
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# sin ej6.py
#
# Copyright 2009 Ernesto Nadir Crespo Avila
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.
#Importar los módulos gtk, time, threading, thread, gobject
import gtk, time
import threading
import thread
import gobject
#Iniciando el hilo sin usarlo
gtk.gdk.threads_init()
#La clase App hereda threading.Thread
class App(threading.Thread):
def __init__(self):
#Método constructor, asociando los widgets
self.glade_file = "ej6.ui"
self.glade = gtk.Builder()
self.glade.add_from_file(self.glade_file)
self.window1 = self.glade.get_object('window1')
self.togglebutton1 = self.glade.get_object('togglebutton1')
self.button1 = self.glade.get_object('button1')
self.progressbar1 = self.glade.get_object('progressbar1')
self.new_val = 0.0
self.rango =60
#Definiendo el valor inicial de la barra de proceso, definiendo los saltos en 0.1
self.progressbar1.set_fraction(self.new_val)
self.progressbar1.set_pulse_step(0.1)
self.window1.connect("destroy",self.on_window1_destroy)
self.button1.connect('clicked', self.on_button1_clicked)
self.togglebutton1.connect('toggled',self.on_togglebutton1_toggled)
#Iniciando el hilo en el constructor
threading.Thread.__init__(self)
self.window1.show_all()
def __iteracion__(self):
#Iteración en segundos cambiando el valor en la barra de progreso.
for i in range(self.rango):
if self.togglebutton1.get_active() == True:
self.new_val = self.progressbar1.get_fraction() + 0.01
if self.new_val > 1.0:
self.new_val = 0.0
self.togglebutton1.set_active(False)
break
else:
time.sleep(1)
self.x = self.new_val*100
self.progressbar1.set_text("%s" %self.x)
self.progressbar1.set_fraction(self.new_val)
else:
return
def on_togglebutton1_toggled(self,*args):
#Si cambia el evento en el boton biestado se inicia la iteración entre los hilos.
variable = self.togglebutton1.get_active()
self.rango = 100
if variable == True:
lock = thread.allocate_lock()
lock.acquire()
thread.start_new_thread( self.__iteracion__, ())
lock.release()
else:
#Se detiene la barra de progreso
self.progressbar1.set_fraction(self.new_val)
self.progressbar1.set_text("%s" %self.x)
return
def on_window1_destroy(self,*args):
#Se cierra la aplicación
gtk.main_quit()
def on_button1_clicked(self,*args):
#Se cierra la aplicación al darle clip al boton salir.
gtk.main_quit()
def main(self):
#Inicia la aplicación
gtk.main()
if __name__ == '__main__':
app = App()
app.main()
En la siguiente figura se muestra la aplicación:
