#!/usr/bin/python
import gtk
import gobject

DELAY = 20
count = 0

class MyApp():

    def __init__(self):
        window = gtk.Window()
        window.set_default_size(200, -1)
        hbox = gtk.HBox()
    	self.hadjustment = gtk.Adjustment()
	
        self.hadjustment.set_upper(100)
        self.hadjustment.set_value(0)
	
        self.hslide = gtk.HScale(self.hadjustment)
        self.hslide.set_digits(0)
        #self.hslide.set_update_policy(gtk.UPDATE_DELAYED)
        self.increment = 1

        self.hslide.connect('key-press-event', self.__capturar_cb)
        window.connect('destroy', self.destroy)	

        window.add(hbox)
        hbox.add(self.hslide)

        window.show_all()

        gobject.timeout_add(DELAY, self.__value_changed_cb, self.hslide)

    def destroy(self, window, data=None):
        gtk.main_quit()

    def __value_changed_cb(self, hslide):
        self.hadjustment.value += self.increment

        if self.hadjustment.value >= 100:
    	    self.increment *= -1
        elif self.hadjustment.value <= 0:
    	    self.increment *= -1

        self.hslide = gtk.HScale(self.hadjustment)
		
        return True
    
    def __capturar_cb(self, hslide, event):
        self.changed_value = hslide.get_value()
        print self.changed_value

if __name__ == "__main__":
    my_app = MyApp()
    gtk.main()