def save_widths(self):
        """Save all current paned widths."""

        paneds = self._get_paneds()
        if len(paneds) == 1 and not paneds[0].get_child1():
            # If there's only one pane (i.e. the only paned has just one
            # child), do not save the paned width, as this will cause
            # a later added second pane to get the width of the previous
            # second pane
            widths = []
        else:
            widths = [str(p.get_relative()) for p in paneds]

        config.setstringlist(self.section, self.option, widths)

    def __column_width_changed(self, *args):
        # make sure non resizable columns stay non expanding.
        # gtk likes to change them sometimes
        for c in self.get_columns():
            if not c.get_resizable() and c.get_expand():
                c.set_expand(False)

        widths = []
        expands = []
        for c in self.get_columns():
            if not c.get_resizable():
                continue
            widths.extend((c.header_name, str(c.get_fixed_width())))
            expands.extend((c.header_name, str(int(c.get_expand()))))
        config.setstringlist("memory", "column_widths", widths)
        config.setstringlist("memory", "column_expands", expands)

def get_columns():
    """Gets the list of songlist column headings"""

    if config.has_option("settings", "columns"):
        return config.getstringlist(
            "settings", "columns", const.DEFAULT_COLUMNS)
    else:
        # migrate old settings
        try:
            columns = config.get("settings", "headers").split()
        except config.Error:
            return const.DEFAULT_COLUMNS
        else:
            config.remove_option("settings", "headers")
            set_columns(columns)
            config.setstringlist("settings", "columns", columns)
            return columns

def set_columns(vals):
    """Persists the settings for songlist headings held in `vals`"""

    config.setstringlist("settings", "columns", vals)

 def __orders_changed(self, *args):
     l = []
     for tag, reverse in self.get_sort_orders():
         l.append("%d%s" % (int(reverse), tag))
     config.setstringlist('memory', 'sortby', l)