Function scrollDragBegin

src/OpenLoco/src/Input/MouseInput.cpp:1479–1493

#pragma mark - Scrollview dragging

    static void scrollDragBegin(int32_t x, int32_t y, Ui::Window* window, Ui::WidgetIndex_t widgetIndex)
    {
        state(State::scrollRight);
        _dragLast.x = x;
        _dragLast.y = y;
        _dragWindowType = window->type;
        _dragWindowNumber = window->number;
        _dragWidgetIndex = widgetIndex;
        _ticksSinceDragStart = 0;

        _dragScrollIndex = window->getScrollDataIndex(widgetIndex);

        Ui::hideCursor();
        startCursorDrag();
    }

#pragma mark - Widgets