title: Flex dataGrid itemRenderer, access cell width and height
body: <p>When writing a custom itemRenderer, how do you reference the height and width of the grid cell that it will be rendered in?  In such a way that it will resize correctly when the grid is resized.</p>
  
  <p>I am writing a dataGrid itemRenderer that draws a bar graph in the final column of a table.</p>
  
  <p>I have tried referencing 'this', 'this.parent', and a few other things with no success.
  My interim hack solution is to add this data to the datacollection, but this wont work when the grid changes size, so I will have to edit it every time.</p>