title: How to allow infinite integer values in a spinner?
body: <p>I need a <a href="http://en.wikipedia.org/wiki/Spinner_%28computing%29" rel="nofollow"><code>Spinner</code></a> widget in which the user can select <strong>integer</strong> values with a certain step and without lower or upper limits
  (I mean, they should be at least in the billion range, so no chance of memorizing the whole sequence).</p>
  
  <p>I saw kivy's <a href="http://kivy.org/docs/api-kivy.uix.spinner.html" rel="nofollow"><code>Spinner</code></a> widget but I don't think doing something like <code>Spinner(values=itertool.count())</code> would work.
  Also it is limited to string values.</p>
  
  <p>Is there any simple way of obtaining something similar to <a href="http://doc.qt.digia.com/qt/qspinbox.html" rel="nofollow"><code>QSpinBox</code></a> of the <code>Qt</code>?</p>