def METHOD_NAME(self):
    if self.text is None:
        return
    self._scan_dir()
    new_matching_files = []
    basename = op.basename(self.text)
    for entry in self.cur_dir_files:
        if entry.startswith(basename):
            new_matching_files.append(entry)
    new_matching_files.sort()
    self.matching_files = new_matching_files
    self.suggestion_view.set_options(self.matching_files)