title: Difference between onScroll() and onFling() of GestureDetector
body: <p>What is the difference between <code>onScroll()</code> and <code>onFling()</code> in the <code>GestureDetector</code> interface?
  When I print out the events they are showing the exact same things. At least the last <code>onScroll()</code> and the <code>onFling()</code>.</p>
  
  <p>The only true difference I noticed is that <code>onScroll()</code> is called much more often, fling always just one time.</p>