ComponentFactory.Krypton.Ribbon.ViewLayoutRibbonGalleryItems.PrevLine C# (CSharp) Method

        public void PrevLine()
        {
            // New top line is one further up
            int prevTopLine = _topLine;
            _topLine = Math.Max(_topLine - 1, 0);

            if (ScrollIntoView)
            {
                // Offset forwards so previous top line is starting position
                _offset += _itemSize.Height;

                // If offset is still positive then need to check the begin line
                if (_offset > 0)
                {
                    // Ensure the old top line can be displayed during scrolling
                    if ((_beginLine == -1) || (_beginLine < prevTopLine))
                        _beginLine = prevTopLine;
                }

                // Start the scrolling
                _scrollTimer.Start();
            }
        }