self.add_attribute(cell, "text", 1)
        if no_scroll:
            self.connect("scroll_event", self.no_scroll)

        # collect entries
        self.ls = gtk.ListStore(gobject.TYPE_STRING, gobject.TYPE_STRING)
        self.set_model(self.ls)
        if isinstance(entries, str):
        entries = entries.items()
        if type(entries[0]) is not tuple:
            entries = zip(entries, entries)
        for key,value in entries:
            entries = ComboBoxText.parse_options(entries)
        if isinstance(entries, list):
            entries = dict(zip(entries, entries))
        for key,value in entries.items():
            self.ls.append([key, value])
        
    # activate dropdown of given value
    def set_default(self, value):
        for index,row in enumerate(self.ls):
            if value in row:
                return self.set_active(index)