protected override void UpdateView()
        {
            Transform spritesContainer = null;

            if (transform.childCount == 0)
            {
                NGUITools.AddChild(gameObject);
            }
            spritesContainer      = transform.GetChild(0);
            spritesContainer.name = "SpritesContainer";

            // default left align
            int currentHorDock    = 0;
            int currentTotalWidth = 0;
            int spriteHeight      = 0;
            int spriteAddIdx      = 0;

            for (int i = 0; i < content.Length; i++)
            {
                if (_charSpriteDic.ContainsKey(content[i]))
                {
                    UI2DSprite uiSprite = AddSprite(spritesContainer, _charSpriteDic[content[i]], currentHorDock, spriteAddIdx++);
                    spriteHeight    = Math.Max(spriteHeight, uiSprite.height);
                    currentHorDock += (uiSprite.width + padding);
                }
            }
            if (Application.isPlaying)
            {
                FUtil.RemoveAllChildren(spritesContainer.gameObject, false, spriteAddIdx);
            }
            else
            {
                FUtil.RemoveAllChildren(spritesContainer.gameObject, true, spriteAddIdx);
            }

            currentTotalWidth = currentHorDock - padding;

            float scaleFact = 1;
            int   calWidth  = 0;

            if (fontHeight > 0 && spriteHeight > 0)
            {
                scaleFact = fontHeight / (float)spriteHeight;
                calWidth  = (int)(scaleFact * currentTotalWidth);
            }
            else
            {
                scaleFact = 1.0f;
                calWidth  = currentTotalWidth;
            }

            if (maxWidth > 0 && calWidth > maxWidth)
            {
                scaleFact = (float)maxWidth / (float)currentTotalWidth;
            }

            spritesContainer.localScale = new Vector3(scaleFact, scaleFact, scaleFact);

            // text alignment
            if (textAlign == TextAlign.RIGHT)
            {
                spritesContainer.localPosition = new Vector3(-currentTotalWidth * scaleFact, 0, 0);
            }
            else if (textAlign == TextAlign.CENTER)
            {
                spritesContainer.localPosition = new Vector3(-currentTotalWidth / 2 * scaleFact, 0, 0);
            }
            else if (textAlign == TextAlign.LEFT)
            {
                spritesContainer.localPosition = new Vector3(0, 0, 0);
            }
        }