def __init__(self, parent, sourceslist, datadir, distro):
    """
    Initialize the dialog that allows to add a new source entering the
    raw apt line
    """
    self.sourceslist = sourceslist
    self.parent = parent
    self.datadir = datadir
    # gtk stuff
    setup_ui(self, os.path.join(datadir, "gtkbuilder", "dialog-add.ui"), domain="software-properties")