title: How to make a button appear to have been clicked or selected? (JavaFX2)
body: <p>When user presses a button in my JavaFX2.2 UI, a dark blue halo appears to show it was clicked. During the course of events, my program may want to 'unclick' it to show it is no longer selected. </p>
  
  <p>I expected a <code>button.setSelected(false);</code> I remember Swing used to have this, but there isn't such a call in JavaFx. 
  This <a href="http://docs.oracle.com/javafx/2/ui_controls/button.htm#CJHEEACB" rel="noreferrer">article</a> discusses drop shadows but I want to simply use the same appearance used when a button is clicked which isn't really a drop shadow. <code>setEffect(new DropShadow())</code>
  Using <code>setStyle()</code> is ok, but what values to use?</p>