C++ Path::IsNull方法代码示例

bool
Path::operator==(Path other) const
{
  return IsNull() || other.IsNull()
    ? (IsNull() && other.IsNull())
    : StringIsEqual(c_str(), other.c_str());
}

Path
Path::RelativeTo(Path parent) const
{
  assert(!IsNull());
  assert(!parent.IsNull());

  auto p = StringAfterPrefix(c_str(), parent.c_str());
  return p != nullptr && IsDirSeparator(*p)
    ? Path(p + 1)
    : nullptr;
}

void
Profile::SetFiles(Path override_path)
{
  /* set the "modified" flag, because we are potentially saving to a
     new file now */
  SetModified(true);

  if (!override_path.IsNull()) {
    if (override_path.IsBase()) {
      if (StringFind(override_path.c_str(), '.') != nullptr)
        startProfileFile = LocalPath(override_path);
      else {
        tstring t(override_path.c_str());
        t += _T(".prf");
        startProfileFile = LocalPath(t.c_str());
      }
    } else
      startProfileFile = Path(override_path);
    return;
  }

  // Set the default profile file
  startProfileFile = LocalPath(_T(XCSPROFILE));
}

 AllocatedPath(Path src)
   :value(src.IsNull() ? nullptr : value_type::Duplicate(src.c_str())) {}

void
InterfaceConfigPanel::Prepare(ContainerWindow &parent, const PixelRect &rc)
{
  const UISettings &settings = CommonInterface::GetUISettings();

  RowFormWidget::Prepare(parent, rc);

  AddInteger(_("Text size"),
             nullptr,
             _T("%d %%"), _T("%d"), 75, 200, 5,
             settings.scale);

  AddFile(_("Events"),
          _("The Input Events file defines the menu system and how XCSoar responds to "
            "button presses and events from external devices."),
          ProfileKeys::InputFile, _T("*.xci\0"));
  SetExpertRow(InputFile);

#ifndef HAVE_NATIVE_GETTEXT
  WndProperty *wp;
  wp = AddEnum(_("Language"),
               _("The language options selects translations for English texts to other "
                   "languages. Select English for a native interface or Automatic to localise "
                   "XCSoar according to the system settings."));
  if (wp != nullptr) {
    DataFieldEnum &df = *(DataFieldEnum *)wp->GetDataField();
    df.addEnumText(_("Automatic"));
    df.addEnumText(_T("English"));

#ifdef HAVE_BUILTIN_LANGUAGES
    for (const BuiltinLanguage *l = language_table;
         l->resource != nullptr; ++l) {
      StaticString<100> display_string;
      display_string.Format(_T("%s (%s)"), l->name, l->resource);
      df.addEnumText(l->resource, display_string);
    }
#endif

    LanguageFileVisitor lfv(df);
    VisitDataFiles(_T("*.mo"), lfv);

    df.Sort(2);

    auto value_buffer = Profile::GetPath(ProfileKeys::LanguageFile);
    Path value = value_buffer;
    if (value.IsNull())
      value = Path(_T(""));

    if (value == Path(_T("none")))
      df.Set(1);
    else if (!value.IsEmpty() && value != Path(_T("auto"))) {
      const Path base = value.GetBase();
      if (base != nullptr)
        df.Set(base.c_str());
    }
    wp->RefreshDisplay();
  }
#endif /* !HAVE_NATIVE_GETTEXT */

  AddTime(_("Menu timeout"),
          _("This determines how long menus will appear on screen if the user does not make any button "
            "presses or interacts with the computer."),
          1, 60, 1, settings.menu_timeout / 2);
  SetExpertRow(MenuTimeout);

  static constexpr StaticEnumChoice text_input_list[] = {
    { (unsigned)DialogSettings::TextInputStyle::Default, N_("Default") },
    { (unsigned)DialogSettings::TextInputStyle::Keyboard, N_("Keyboard") },
    { (unsigned)DialogSettings::TextInputStyle::HighScore,
      N_("HighScore Style") },
    { 0 }
  };

  AddEnum(_("Text input style"),
          _("Determines how the user is prompted for text input (filename, teamcode etc.)"),
          text_input_list, (unsigned)settings.dialog.text_input_style);
  SetExpertRow(TextInput);

  /* on-screen keyboard doesn't work without a pointing device
     (mouse or touch screen) */
  SetRowVisible(TextInput, HasPointer());

#ifdef HAVE_VIBRATOR
  static constexpr StaticEnumChoice haptic_feedback_list[] = {
    { (unsigned)UISettings::HapticFeedback::DEFAULT, N_("OS settings") },
    { (unsigned)UISettings::HapticFeedback::OFF, N_("Off") },
    { (unsigned)UISettings::HapticFeedback::ON, N_("On") },
    { 0 }
  };

  wp = AddEnum(_("Haptic feedback"),
               _("Determines if haptic feedback like vibration is used."),
               haptic_feedback_list, (unsigned)settings.haptic_feedback);
  SetExpertRow(HapticFeedback);
#endif /* HAVE_VIBRATOR */
}