title: Display QImage with QtGui
body: <p>I am new to Qt, and I am trying to create a simple GUI Application that displays an image once a button has been clicked on.</p>
  
  <p>I can read the image in a <code>QImage</code> object, but is there any simple way to call a Qt function that takes the <code>QImage</code> as an input, and displays it?</p>