Method Click

src/tracks/ui/TimeShiftHandle.cpp:457–524

}

UIHandle::Result TimeShiftHandle::Click(
   const TrackPanelMouseEvent &evt, AudacityProject *pProject)
{
   using namespace RefreshCode;
   const bool unsafe = ProjectAudioIO::Get( *pProject ).IsAudioActive();
   if ( unsafe )
      return Cancelled;

   const wxMouseEvent &event = evt.event;
   const wxRect &rect = evt.rect;
   auto &viewInfo = ViewInfo::Get( *pProject );

   const auto pView =
      std::dynamic_pointer_cast<CommonTrackPanelCell>(evt.pCell);
   const auto pTrack = pView ? pView->FindTrack() : nullptr;
   if (!pTrack)
      return RefreshCode::Cancelled;

   mClipMoveState.clear();
   mDidSlideVertically = false;

   const bool multiToolModeActive =
      (ToolCodes::multiTool == ProjectSettings::Get( *pProject ).GetTool());

   const double clickTime =
      viewInfo.PositionToTime(event.m_x, rect.x);

   auto pShifter = MakeTrackShifter::Call(*pTrack, *pProject);

   auto hitTestResult = TrackShifter::HitTestResult::Track;
   if (!event.ShiftDown()) {
      TrackShifter::HitTestParams params{
         rect, event.m_x, event.m_y
      };
      hitTestResult = pShifter->HitTest( clickTime, viewInfo, &params );
      switch( hitTestResult ) {
      case TrackShifter::HitTestResult::Miss:
         return Cancelled;
      default:
         break;
      }
   }
   else {
      // just do shifting of one whole track
   }

   auto &trackList = TrackList::Get(*pProject);
   mClipMoveState.Init(*pProject, *pTrack,
      hitTestResult, move(pShifter), clickTime,
      viewInfo, trackList,
      SyncLockState::Get( *pProject ).IsSyncLocked() );

   mSlideUpDownOnly = event.CmdDown() && !multiToolModeActive;
   mRect = rect;
   mClipMoveState.mMouseClickX = event.m_x;
   mSnapManager =
   std::make_shared<SnapManager>(*trackList.GetOwner(),
       FindCandidates( trackList, mClipMoveState.shifters ),