Method HitTest

src/AdornedRulerPanel.cpp:1057–1123

};

std::vector<UIHandlePtr> AdornedRulerPanel::QPCell::HitTest(
   const TrackPanelMouseState &state,
   const AudacityProject *pProject)
{
   // Creation of overlays on demand here -- constructor of AdornedRulerPanel
   // is too early to do it
   mParent->CreateOverlays();

   std::vector<UIHandlePtr> results;
   auto xx = state.state.m_x;

   {
      // Allow click and drag on the play head even while recording
      // Make this handle more prominent then the quick play handle
      auto result = PlayheadHandle::HitTest( pProject, *mParent, xx );
      if (result) {
         result = AssignUIHandlePtr( mPlayheadHolder, result );
         results.push_back( result );
      }
   }

   // Disable mouse actions on Timeline while recording.
   if (!mParent->mIsRecording) {
      mParent->UpdateQuickPlayPos( xx );

      #if 0
      auto result = std::make_shared<QPHandle>( mParent, xx );
      result = AssignUIHandlePtr( mHolder, result );
      results.push_back( result );
      #endif
   }

   // High priority hit is a handle to change the existing play region
   bool hitLeft = false;
   const auto &playRegion = ViewInfo::Get(*pProject).playRegion;
   if ((hitLeft =
        mParent->IsWithinMarker(xx, playRegion.GetLastActiveStart())) ||
       mParent->IsWithinMarker(xx, playRegion.GetLastActiveEnd()))
   {
      auto result =
         std::make_shared<ResizePlayRegionHandle>( mParent, xx, hitLeft );
      result = AssignUIHandlePtr( mResizePlayRegionHolder, result );
      results.push_back(result);
   }

   // Middle priority hit is a handle to change the existing play region at
   // both ends, but only when the play region is active
   if (auto time = mParent->Pos2Time(xx);
       playRegion.Active() &&
       time >= playRegion.GetStart() &&
       time <= playRegion.GetEnd())
   {
      auto result =
         std::make_shared<MovePlayRegionHandle>( mParent, xx );
      result = AssignUIHandlePtr( mMovePlayRegionHolder, result );
      results.push_back(result);
   }