qt - How to work with QGraphicsScene::addPixmap when it only accepts const QPixmap? -

I would like to display QGraphicsScene through some QImage My code is very straightforward:

mainwindow.h

  QImage * sourceImage; QGraphicsView * imageView; QGraphicsScene * imageScene;   
  mainwindow.cpp   
  imageScene = new QGraphicsScene; ImageView = New QGraphicsView; ImageView-> SetScene (imageScene); SourceImage = new QImage; SourceImage.load (": / targetimage.png"); ImageScene.addPixmap (QPixmap :: fromImage (sourceImage));   
 And after that the complainant has stated that whatever I did wrong: only accept  const QPixmap  as argument, and I  QImage < / Code>  const QPixmap  is not allowed, because accept  const QImage  within  QPixmap :: fromImage , such as  Const  hell  
 This method does not make much sense to me, if I want to create an image viewer, for example, and during the runtime, I definitely have to load different images  QImage sourceImage < / Code>, and how can I do that a  const QImage ?  
 Using this problem has become sick, thanks for any advice, can you give me a little bit light if there is any vision on philosophical reasons, how do people in QT make these methods Are  const ?   
 
 
 Try  
  imageScene.addPixmap (QPixmap :: fromImage ( * Source image));   
 Some advice:  
 There is no need to allocate the keys to the pile (new experiment). Use:  
  QImage source image;   
 Then you do not need to call  QPixmap :: fromImage    
 when you call, just to clarify : Constness has nothing to do with error.