Function vTrackTop

src/OpenLoco/src/Ui/ScrollView.cpp:420–430

0x004C8C0D

    // 0x004C8C0D
    static void vTrackTop(Ui::Window& window, const size_t scrollAreaIndex, const WidgetIndex_t widgetIndex)
    {
        int16_t trackHeight = window.widgets[widgetIndex].height() - 2;
        if (window.scrollAreas[scrollAreaIndex].hasFlags(ScrollFlags::hscrollbarVisible))
        {
            trackHeight -= kScrollbarSize;
        }
        window.scrollAreas[scrollAreaIndex].contentOffsetY = std::max(window.scrollAreas[scrollAreaIndex].contentOffsetY - trackHeight, 0);
        ScrollView::updateThumbs(window, widgetIndex);
        WindowManager::invalidateWidget(window.type, window.number, widgetIndex);
    }

    // 0x004C8C7D
    static void vTrackBottom(Ui::Window& window, const size_t scrollAreaIndex, const WidgetIndex_t widgetIndex)