def do_convert(self):
     print "CurrencyConverter::do_convert"
     print "CurrencyConverter::do_convert. Update interval:", self.update_interval
     print "Convert from:", self.def_from, "to", self.def_to
     url = "http://quote.yahoo.com/d/quotes.csv?s=%s%s=X&f=l1&e=.csv" % (self.def_from, self.def_to)
     print url
     self.applet.setBusy(True)
     job = KIO.get(KUrl(url), KIO.NoReload, KIO.HideProgressInfo)
     job.warning.connect(self.job_warning)
     job.data.connect(self.job_received)
     job.result.connect(self.job_done)
     self.timer.start() # restart the timer on activity