XPTable.Models.Table.GetNewIndexFromPageDown C# (CSharp) Method

        private int GetNewIndexFromPageDown()
        {
            int i;
            if (!this.VScroll)
            {
                // Not enough data to scroll, so go to the bottom row
                i = this.RowCount - 1;
            }
            else
            {
                int currentRow = this.FocusedCell.Row;
                int bottomRow = topIndex + vScrollBar.LargeChange - 2;
                if (currentRow < bottomRow)
                {
                    i = bottomRow;
                }
                else
                {
                    i = Math.Min(this.RowCount - 1, currentRow - 2 + this.vScrollBar.LargeChange);
                }
            }
            return i;
        }