Method Draw

src/TrackPanel.cpp:1280–1330

   }

   void Draw(TrackPanelDrawingContext& context,
      const wxRect& rect, unsigned iPass) override
   {
      TrackPanelGroup::Draw(context, rect, iPass);
      if (iPass == TrackArtist::PassTracks)
      {
         auto vRulerRect = rect;
         vRulerRect.width = mLeftOffset - rect.x;

         auto dc = &context.dc;

         // Paint the background;
         AColor::MediumTrackInfo(dc, mpTrack->GetSelected() );
         dc->DrawRectangle( vRulerRect );

         const auto channels = mpTrack->Channels();
         auto& view = ChannelView::Get(**channels.begin());
         if(auto affordance = view.GetAffordanceControls())
         {
            const auto yy = vRulerRect.y + kAffordancesAreaHeight - 1;
            AColor::Dark( dc, false );
            AColor::Line( *dc, vRulerRect.GetLeft(), yy, vRulerRect.GetRight(), yy );
         }

         // Stroke left and right borders
         dc->SetPen(*wxBLACK_PEN);
         
         AColor::Line( *dc, vRulerRect.GetLeftTop(), vRulerRect.GetLeftBottom() );
         AColor::Line( *dc, vRulerRect.GetRightTop(), vRulerRect.GetRightBottom() );
      }
      if (iPass == TrackArtist::PassFocus && mpTrack->IsSelected()) {
         const auto channels = mpTrack->Channels();
         const auto pLast = *channels.rbegin();
         wxCoord yy = rect.GetTop();
         auto heights = FindAdjustedChannelHeights(*mpTrack);
         auto pHeight = heights.begin();
         for (auto pChannel : channels) {
            auto& view = ChannelView::Get(*pChannel);
            auto height = *pHeight++;
            if (auto affordance = view.GetAffordanceControls())
               height += kAffordancesAreaHeight;
            auto trackRect = wxRect(
               mLeftOffset,
               yy,
               rect.GetRight() - mLeftOffset,
               height - kChannelSeparatorThickness);
            TrackArt::DrawCursor(context, trackRect, mpTrack.get());
            yy += height;
         }
      }
   }

   const std::shared_ptr<Track> mpTrack;
   wxCoord mLeftOffset;