images.py 文件源码

def switch_icon_version(self, icon_id, current_icon):
        """
        Switch version of ``icon``.

        :param icon_id: id of the icon

        :return: :class:`Gtk.Image` or ``None``
        """
        icon_values = self.icons.get(icon_id, None)
        if not icon_values:
            return

        if current_icon is icon_values["regular"]:
            return icon_values["activated"]
        elif current_icon is icon_values["activated"]:
            return icon_values["regular"]