title: Text field that expands horizontally to fit the text contents
body: <p>I am trying to make a text field that expands horizontally to fit the text contents, bounded with a maxWidth and minWidth in pixels.</p>
  
  <p><code>TextEditingController()</code> does not appear to expose the width of the text, and it seems to always expand to maximum available width, even if wrapped with <code>Flexible()</code></p>