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

        private void ProcessBringIntoView()
        {
            // Do we need to process a 'BringIntoView' request?
            if (_bringIntoView >= 0)
            {
                // If there are any lines to actually work against
                if (_lineItems > 0)
                {
                    // Find target line for bringing into view
                    int line = _bringIntoView / _lineItems;
                    int itemLine = line;

                    // Limit check to the last line for display purposes
                    if (line > _endLine)
                        line = _endLine;

                    // Cache top line before any changes made to it
                    int prevTopLine = _topLine;

                    // Is that line before the current top line?
                    if (line < _topLine)
                    {
                        // How many lines do we need to scroll upwards
                        int diffLines = _topLine - line;

                        // Shift topline to target immediately
                        _topLine = line;

                        // If we are supposed to scroll to the target position
                        if (ScrollIntoView)
                        {
                            // Modify the offset to reflect change in number of lines
                            _offset += _itemSize.Height * diffLines;
                            _scrollTimer.Start();
                        }
                        else
                        {
                            _offset = 0;
                            _scrollTimer.Stop();
                        }
                    }
                    else if (itemLine >= (_topLine + _displayLines))
                    {
                        // How many lines do we need to scroll upwards
                        int diffLines = itemLine - (_topLine + (_displayLines - 1));

                        // Shift topline to target immediately
                        _topLine = itemLine - (_displayLines - 1);

                        if (ScrollIntoView)
                        {
                            // Modify the offset to reflect change in number of lines
                            _offset -= _itemSize.Height * diffLines;
                            _scrollTimer.Start();
                        }
                        else
                        {
                            _offset = 0;
                            _scrollTimer.Stop();
                        }
                    }

                    // Update the begin line
                    if (_offset < 0)
                    {
                        // Ensure the old top line can be displayed during scrolling
                        if ((_beginLine == -1) || (_beginLine > prevTopLine))
                            _beginLine = prevTopLine;
                    }
                    else if (_offset > 0)
                    {
                        // Ensure the old top line can be displayed during scrolling
                        if ((_beginLine == -1) || (_beginLine < prevTopLine))
                            _beginLine = prevTopLine;
                    }
                }

                // Reset the request
                _bringIntoView = -1;
            }
        }