Method Drag

src/tracks/ui/TrackSelectHandle.cpp:114–149

}

UIHandle::Result TrackSelectHandle::Drag
(const TrackPanelMouseEvent &evt, AudacityProject *pProject)
{
   using namespace RefreshCode;
   Result result = RefreshNone;
   if (!mpTrack)
      return result;

   const wxMouseEvent &event = evt.event;

   auto &tracks = TrackList::Get( *pProject );

   // probably harmless during play?  However, we do disallow the click, so check this too.
   bool unsafe = ProjectAudioIO::Get( *pProject ).IsAudioActive();
   if (unsafe)
      return result;

   if (event.m_y < mMoveUpThreshold || event.m_y < 0) {
      tracks.MoveUp(*mpTrack);
      --mRearrangeCount;
   }
   else if ( event.m_y > mMoveDownThreshold
      || event.m_y > evt.whole.GetHeight() ) {
      tracks.MoveDown(*mpTrack);
      ++mRearrangeCount;
   }
   else
      return result;

   // JH: if we moved up or down, recalculate the thresholds and make sure the
   // track is fully on-screen.
   CalculateRearrangingThresholds(event, pProject);

   result |= EnsureVisible | RefreshAll;
   return result;
}

HitTestPreview TrackSelectHandle::Preview
(const TrackPanelMouseState &, AudacityProject *project)