Method onDraw

src/openrct2-ui/windows/TrackList.cpp:452–670

        }

        void onDraw(RenderTarget& rt) override
        {
            drawWidgets(rt);

            int32_t listItemIndex = selectedListItem;
            if ((gLegacyScene == LegacyScene::trackDesignsManager) == 0)
            {
                // Because the first item in the list is "Build a custom design", lower the index by one
                listItemIndex--;
            }

            if (_filteredTrackIds.empty() || listItemIndex == -1)
                return;

            int32_t trackIndex = _filteredTrackIds[listItemIndex];

            // Track preview
            auto& tdWidget = widgets[WIDX_TRACK_PREVIEW];
            auto colour = getColourMap(colours[0].colour).darkest;
            u8string path = _trackDesigns[trackIndex].path;

            // Show track file path (in debug mode)
            if (Config::Get().general.debuggingTools)
            {
                const auto shortPath = shortenPath(path, width, FontStyle::medium);
                drawText(
                    rt, windowPos + ScreenCoordsXY{ 0, height - kDebugPathHeight - 3 }, shortPath,
                    { colours[1] }); // TODO Check dpi
            }

            auto screenPos = windowPos + ScreenCoordsXY{ tdWidget.left + 1, tdWidget.top + 1 };
            Rectangle::fill(rt, { screenPos, screenPos + ScreenCoordsXY{ 369, 216 } }, colour); // TODO Check dpi

            if (_loadedTrackDesignIndex != trackIndex)
            {
                if (loadDesignPreview(path))
                {
                    _loadedTrackDesignIndex = trackIndex;
                }
                else
                {
                    _loadedTrackDesignIndex = kTrackDesignIndexUnloaded;
                }
            }

            if (!_loadedTrackDesign)
            {
                return;
            }

            auto trackPreview = screenPos;
            screenPos = windowPos + ScreenCoordsXY{ tdWidget.midX(), tdWidget.midY() };

            G1Element g1temp = {};
            g1temp.offset = reinterpret_cast<uint8_t*>(
                _trackDesignPreviewPixels.data() + (_currentTrackPieceDirection * kTrackPreviewImageSize));
            g1temp.width = 370;
            g1temp.height = 217;