title: Fixed aspect ratio View
body: <p>How would I go implementing a fixed aspect ratio <code>View</code>? I'd like to have items with 1:1 aspect ratio in a <code>GridView</code>. I think it's better to subclass the children than the <code>GridView</code>?</p>
  
  <p>EDIT: I assume this needs to be done programmatically, that's no problem. Also, I don't want to limit the size, only the aspect ratio.</p>