title: Is it possible to add listener to xAxis in App Designer
body: <p>I am trying to add a listener to the x Axis for a plot in a GUI. However, nothing I have tried seem to be working. The purpose for doing this is to update a max, min and mean field every time the viewing window changes.</p>
  
  <p>Some things that I have tried:</p>
  
  <pre><code>addlistener(app.UIAxes.XLim, 'PostSet', @xChangeCallBack)
  listener(app.UIAxes.XLim, 'PostSet', @xChangeCallBack)
  </code></pre>
  
  <p>.. and many other,</p>
  
  <p>Anyone have any ideas?</p>