void onSelectFontFile() {
    FileSelectorFiles face;
    if (!show_file_selector(
          "Select a TrueType Font",
          m_face,
          "ttf,ttc,otf,dfont",
          FileSelectorType::Open, face))
      return;

    ASSERT(!face.empty());
    setFontFace(face.front());
  }
    void onSelectFontFile() {
        std::string face = show_file_selector(
                               "Select a TrueType Font",
                               m_face,
                               "ttf",
                               FileSelectorType::Open,
                               nullptr);

        if (!face.empty()) {
            setFontFace(face);
        }
    }