Function GetPropertiesOfSelected

src/ProjectAudioManager.cpp:1337–1360

GetSelectedProperties collects information about currently selected audio tracks

// GetSelectedProperties collects information about
// currently selected audio tracks
PropertiesOfSelected
GetPropertiesOfSelected(const AudacityProject &proj)
{
   double rateOfSelection{ RATE_NOT_SELECTED };

   PropertiesOfSelected result;
   result.allSameRate = true;

   const auto selectedTracks{
      TrackList::Get(proj).Selected<const WaveTrack>() };

   for (const auto & track : selectedTracks) {
      if (rateOfSelection != RATE_NOT_SELECTED &&
         track->GetRate() != rateOfSelection)
         result.allSameRate = false;
      else if (rateOfSelection == RATE_NOT_SELECTED)
         rateOfSelection = track->GetRate();
   }

   result.anySelected = !selectedTracks.empty();
   result.rateOfSelected = rateOfSelection;

   return  result;
}