title: JavaFX: Get visible area of ScrollPane
body: <p><strong>What I want to do:</strong><br>
  I've got a JavaFX <code>ScrollPane</code> and I need to <strong>determine the area visible in the <code>ScrollPane</code></strong>. I know about <code>ScrollPane.getViewPortBounds()</code>, which allows me to get the size of the visible area, but not the position.</p>
  
  <p>Is there any way I can do this?</p>
  
  <hr>
  
  <p><strong>In context:</strong><br>
  I'm displaying a very large image, which needs to be displayed in only portions at a time. The entire <code>ScrollPane</code> is used to scroll the image, but to determine which parts of the image I need to load, I need to know the visible area displayed in the <code>ScrollPane</code>.</p>