Method LoadSettingsFromString

libraries/lib-effects/Effect.cpp:220–289

}

OptionalMessage Effect::LoadSettingsFromString(
   const wxString & parms, EffectSettings &settings) const
{
   // If the string starts with one of certain significant substrings,
   // then the rest of the string is reinterpreted as part of a registry key,
   // and a user or factory preset is then loaded.
   // (Where did these prefixes come from?  See EffectPresetsDialog; and
   // ultimately the uses of it by EffectManager::GetPreset, which is used by
   // the macro management dialog)
   wxString preset = parms;
   OptionalMessage result;
   if (preset.StartsWith(kUserPresetIdent))
   {
      preset.Replace(kUserPresetIdent, wxEmptyString, false);
      result = LoadUserPreset(UserPresetsGroup(preset), settings);
   }
   else if (preset.StartsWith(kFactoryPresetIdent))
   {
      preset.Replace(kFactoryPresetIdent, wxEmptyString, false);
      auto presets = GetFactoryPresets();
      result = LoadFactoryPreset(
         make_iterator_range( presets ).index( preset ), settings );
   }
   else if (preset.StartsWith(kCurrentSettingsIdent))
   {
      preset.Replace(kCurrentSettingsIdent, wxEmptyString, false);
      result = LoadUserPreset(CurrentSettingsGroup(), settings);
   }
   else if (preset.StartsWith(kFactoryDefaultsIdent))
   {
      preset.Replace(kFactoryDefaultsIdent, wxEmptyString, false);
      result = LoadUserPreset(FactoryDefaultsGroup(), settings);
   }
   else
   {
      // If the string did not start with any of the significant substrings,
      // then use VisitSettings or LoadSettings to reinterpret it,
      // or use LoadSettings.
      // This interprets what was written by SaveSettings, above.
      CommandParameters eap(parms);
      ShuttleSetAutomation S;
      S.SetForValidating( &eap );
      // VisitSettings returns false if not defined for this effect.
      // To do: fix const_cast in use of VisitSettings
      if ( !const_cast<Effect*>(this)->VisitSettings(S, settings) ) {
         // the old method...
         if (LoadSettings(eap, settings))
            return { nullptr };
      }
      else if( !S.bOK )
         result = {};
      else{
         result = { nullptr };
         S.SetForWriting( &eap );
         const_cast<Effect*>(this)->VisitSettings(S, settings);
      }
   }