FairyGUI.GList.UpdateBounds C# (CSharp) Method

        protected override void UpdateBounds()
        {
            if (_virtual)
                return;

            int cnt = _children.Count;
            int i;
            GObject child;
            float curX = 0;
            float curY = 0;
            float cw, ch;
            float maxWidth = 0;
            float maxHeight = 0;
            float sw;
            float sh;

            if (_layout == ListLayoutType.SingleColumn)
            {
                for (i = 0; i < cnt; i++)
                {
                    child = GetChildAt(i);
                    if (foldInvisibleItems && !child.visible)
                        continue;

                    sw = Mathf.CeilToInt(child.width);
                    sh = Mathf.CeilToInt(child.height);

                    if (curY != 0)
                        curY += _lineGap;
                    child.y = curY;
                    curY += sh;
                    if (sw > maxWidth)
                        maxWidth = sw;
                }
                cw = curX + maxWidth;
                ch = curY;
            }
            else if (_layout == ListLayoutType.SingleRow)
            {
                for (i = 0; i < cnt; i++)
                {
                    child = GetChildAt(i);
                    if (foldInvisibleItems && !child.visible)
                        continue;

                    sw = Mathf.CeilToInt(child.width);
                    sh = Mathf.CeilToInt(child.height);

                    if (curX != 0)
                        curX += _columnGap;
                    child.x = curX;
                    curX += sw;
                    if (sh > maxHeight)
                        maxHeight = sh;
                }
                cw = curX;
                ch = curY + maxHeight;
            }
            else if (_layout == ListLayoutType.FlowHorizontal)
            {
                int j = 0;
                float viewWidth = this.viewWidth;
                for (i = 0; i < cnt; i++)
                {
                    child = GetChildAt(i);
                    if (foldInvisibleItems && !child.visible)
                        continue;

                    sw = Mathf.CeilToInt(child.width);
                    sh = Mathf.CeilToInt(child.height);

                    if (curX != 0)
                        curX += _columnGap;

                    if (_lineItemCount != 0 && j >= _lineItemCount
                        || _lineItemCount == 0 && curX + sw > viewWidth && maxHeight != 0)
                    {
                        //new line
                        curX -= _columnGap;
                        if (curX > maxWidth)
                            maxWidth = curX;
                        curX = 0;
                        curY += maxHeight + _lineGap;
                        maxHeight = 0;
                        j = 0;
                    }
                    child.SetXY(curX, curY);
                    curX += sw;
                    if (sh > maxHeight)
                        maxHeight = sh;
                    j++;
                }
                ch = curY + maxHeight;
                cw = maxWidth;
            }
            else if (_layout == ListLayoutType.FlowVertical)
            {
                int j = 0;
                float viewHeight = this.viewHeight;
                for (i = 0; i < cnt; i++)
                {
                    child = GetChildAt(i);
                    if (foldInvisibleItems && !child.visible)
                        continue;

                    sw = Mathf.CeilToInt(child.width);
                    sh = Mathf.CeilToInt(child.height);

                    if (curY != 0)
                        curY += _lineGap;

                    if (_lineItemCount != 0 && j >= _lineItemCount
                        || _lineItemCount == 0 && curY + sh > viewHeight && maxWidth != 0)
                    {
                        curY -= _lineGap;
                        if (curY > maxHeight)
                            maxHeight = curY;
                        curY = 0;
                        curX += maxWidth + _columnGap;
                        maxWidth = 0;
                        j = 0;
                    }
                    child.SetXY(curX, curY);
                    curY += sh;
                    if (sw > maxWidth)
                        maxWidth = sw;
                    j++;
                }
                cw = curX + maxWidth;
                ch = maxHeight;
            }
            else //pagination
            {
                int j = 0;
                int p = 0;
                float viewWidth = this.viewWidth;
                float viewHeight = this.viewHeight;
                for (i = 0; i < cnt; i++)
                {
                    child = GetChildAt(i);
                    if (foldInvisibleItems && !child.visible)
                        continue;

                    sw = Mathf.CeilToInt(child.width);
                    sh = Mathf.CeilToInt(child.height);

                    if (curX != 0)
                        curX += _columnGap;

                    if (_lineItemCount != 0 && j >= _lineItemCount
                        || _lineItemCount == 0 && curX + sw > viewWidth && maxHeight != 0)
                    {
                        //new line
                        curX -= _columnGap;
                        if (curX > maxWidth)
                            maxWidth = curX;
                        curX = 0;
                        curY += maxHeight + _lineGap;
                        maxHeight = 0;
                        j = 0;

                        if (curY + sh > viewHeight && maxWidth != 0)//new page
                        {
                            p++;
                            curY = 0;
                        }
                    }
                    child.SetXY(p * viewWidth + curX, curY);
                    curX += sw;
                    if (sh > maxHeight)
                        maxHeight = sh;
                    j++;
                }
                ch = curY + maxHeight;
                cw = (p + 1) * viewWidth;
            }

            HandleAlign(cw, ch);
            SetBounds(0, 0, cw, ch);

            this.InvalidateBatchingState();
        }