sbar_cid = self.get_widget("statusbar").get_context_id("messages")
            # remove text
            while ((not text) and (type(text)==str) and len(sbar_msg)):
                sbar_msg.pop()
                mygtk.do(lambda:self.statusbar.pop(sbar_cid))
            # progressbar
            if (type(text)==float):
                __print__(dbg.PROC, "status.progressbar", float, text)
                if (text >= 999.0/1000):  # completed
                    mygtk.do(lambda:self.progress.hide())
                else:  # show percentage
                    __print__(dbg.PROC, "status.progressbar", dbg.ERR, "fraction")
                    mygtk.do(lambda:self.progress.show() or self.progress.set_fraction(text))
                    if (text <= 0):  # unknown state
                        __print__(dbg.PROC, "status.progressbar", dbg.STAT, "PULSE")
                        mygtk.do(lambda:self.progress.pulse())
            # add text
            elif (type(text)==str):
                sbar_msg.append(1)
                mygtk.do(lambda:self.statusbar.push(sbar_cid, text))
            pass