title: Displayin an Image in a QGraphicsScene
body: <p>I have a short script that modifies an image with PIL several times.  I would like to be able to display the intermediate steps as it finishes with them, so I added a QGraphics Scene and I am trying to display the stages there.  It will properly size and center the final stage (the last one posted before exiting the function), but it displays the intermediate steps without sizing or centering them.  </p>
  
  <p>The code to post the image is:</p>
  
  <pre><code>        #Code to generate the image and create the loop here...
          imgQ = ImageQt.ImageQt(img)
          pixMap = QtGui.QPixmap.fromImage(imgQ)
  
          scene = QtGui.QGraphicsScene()
          self.ui.previewGv.setScene(scene)
          pixMap = pixMap.scaled(self.ui.previewGv.size())
          #scene.clear()
          scene.addPixmap(pixMap)               
          self.ui.previewGv.repaint()
          self.ui.previewGv.show()
  </code></pre>
  
  <p>Is there some way to get it to properly display each stage?</p>