title: Remove scroll functionality on mouse wheel QGraphics view
body: <p>I have a QGraphicsView window on my widget and have just put in an event for mouse wheel which zooms in on the image.</p>
  
  <p>However as soon as i zoom in scroll bars are displayed and the scroll functionality on the mouse wheel overrides the zoom function i have.</p>
  
  <p>i was wondering if there is any way that i can remove scrolling all together and add a drag to move option or maybe a CTRL and mouse wheel to zoom and mouse wheel alone would control scrolling</p>
  
  <p>here is my zoom function (Which im aware isnt perfect) but if anyone could shed some light on that it would be a bonus </p>
  
  <p>cheers in advance</p>
  
  <pre><code>void Test::wheelEvent(QWheelEvent *event)
  {
      if(event-&gt;delta() &gt; 0)
      {
          ui-&gt;graphicsView-&gt;scale(2,2);
      }
      else
      {
          ui-&gt;graphicsView-&gt;scale(0.5,0.5);
      }
  }
  </code></pre>