RadTileView doesn't have such functionality built-in and I am afraid such implementation will require heavy customization on your side. However, you can try to achieve similar effect using a simpler approach that includes setting the ColumnsCount property of the RadTileView control. Basically, if there is no space for the item and the horizontal scroll bar is displayed you can change the tileview's columns count in order for the items to rearrange in such manner so the scroll presenter is not displayed.
Please let me know if this helps.
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