Method onDraw

src/openrct2-ui/windows/Footpath.cpp:556–620

        }

        void onDraw(Drawing::RenderTarget& rt) override
        {
            ScreenCoordsXY screenCoords;
            WindowDrawWidgets(*this, rt);
            WindowFootpathDrawDropdownButtons(rt);

            if (!isWidgetDisabled(WIDX_CONSTRUCT))
            {
                // Get construction image
                uint8_t direction = (_footpathConstructDirection + GetCurrentRotation()) % kNumOrthogonalDirections;
                auto slopeOffset = EnumValue(_footpathConstructSlope);

                std::optional<uint32_t> baseImage;
                if (gFootpathSelection.legacyPath == kObjectEntryIndexNull)
                {
                    auto selectedPath = gFootpathSelection.getSelectedSurface();
                    const auto* pathType = GetPathSurfaceEntry(selectedPath);
                    if (pathType != nullptr)
                    {
                        baseImage = pathType->BaseImageId;
                    }
                }
                else
                {
                    auto& objManager = GetContext()->GetObjectManager();
                    const auto* pathObj = objManager.GetLoadedObject<FootpathObject>(gFootpathSelection.legacyPath);
                    if (pathObj != nullptr)
                    {
                        auto pathEntry = reinterpret_cast<const FootpathEntry*>(pathObj->GetLegacyData());
                        if (gFootpathSelection.isQueueSelected)
                            baseImage = pathEntry->GetQueueImage();
                        else
                            baseImage = pathEntry->image;
                    }
                }

                if (baseImage)
                {
                    auto image = *baseImage + kConstructionPreviewImages[slopeOffset][direction];

                    // Draw construction image
                    screenCoords = this->windowPos
                        + ScreenCoordsXY{ widgets[WIDX_CONSTRUCT].midX(), widgets[WIDX_CONSTRUCT].bottom - 60 };
                    GfxDrawSprite(rt, ImageId(image), screenCoords);
                }

                // Draw build this... label
                screenCoords = this->windowPos
                    + ScreenCoordsXY{ widgets[WIDX_CONSTRUCT].midX(), widgets[WIDX_CONSTRUCT].bottom - 23 };
                drawText(rt, screenCoords, STR_BUILD_THIS, { TextAlignment::centre });
            }

            // Draw cost
            screenCoords = this->windowPos
                + ScreenCoordsXY{ widgets[WIDX_CONSTRUCT].midX(), widgets[WIDX_CONSTRUCT].bottom - 12 };
            if (_windowFootpathCost != kMoney64Undefined)
            {
                if (!(getGameState().park.flags & PARK_FLAGS_NO_MONEY))