Function InputScrollPartUpdateVTop

src/openrct2-ui/input/MouseInput.cpp:903–915

* * rct2: 0x006E9C37 */

     *  rct2: 0x006E9C37
     */
    static void InputScrollPartUpdateVTop(WindowBase& w, WidgetIndex widgetIndex, int32_t scroll_id)
    {
        auto* windowMgr = GetWindowManager();
        if (windowMgr->FindByNumber(w.classification, w.number) != nullptr)
        {
            auto& scroll = w.scrolls[scroll_id];
            scroll.flags |= VSCROLLBAR_UP_PRESSED;
            if (scroll.contentOffsetY >= 3)
                scroll.contentOffsetY -= 3;
            widgetScrollUpdateThumbs(w, widgetIndex);
            windowMgr->InvalidateWidgetByNumber(w.classification, w.number, widgetIndex);
        }
    }

    /**
     *