Auto-sizing the height of a TileList

Would you like the TileList component to auto-size to its content? If you have a fixed width OR height you could use the following hack (the example is based on a fixed width of 4 columns):

<mx:TileList
id="tl"
columnWidth="160"
rowHeight="160"
columnCount="4"
verticalScrollPolicy="off"
horizontalScrollPolicy="off"
updateComplete="upd()"
dataProvider="{xx}">

private function upd(): void
{
var rc: int = Math.ceil(xx.length / tl.columnCount);
if (tl.rowCount!=rc) tl.rowCount = rc;
}

It's important to turn of the scroll policy to prevent the vertical scrollbar from appearing and disappearing.