title: How to fullscreen a QGLWidget?
body: <p>I am new to OpenGL and Qt, and I am learning both simultaneously(3 days already:). I couple of years ago I did some exmerimenting with DirectX and I clearly remember that it was possible to make a full-screen window there. By full-screen I mean really full-screen, even without the top part where you have the close fullscreen and minimize buttons.</p>
  
  <p>I have this program so far:</p>
  
  <pre><code>#include &lt;QApplication&gt;
  
  int main(int argc, char** argv)
  {
      QApplication app(argc, argv);
      QGLWidget w;
      w.show();
      return app.exec();
  }
  </code></pre>
  
  <p>What should I add to it to make w full-screen? </p>