title: How to position element at build
body: <p>Ok so I have an horizontal listView and I am trying to add a transform on each listview item depending on where it is from the horizontal center of the screen.</p>
  <p>Now the issue is that it seems impossible for me to know the position of elements at initial builds as I can't get values of attached GlobalKey bounds.</p>
  <p>trying to achieve something close to this</p>
  <p><a href="https://i.stack.imgur.com/7zNu6.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/7zNu6.png" alt="enter image description here" /></a></p>
  <p>How can I get position of that listView elements or work around this?</p>