Customization of QGraphicsItem based applications.

[rishiraj]

Hi everyone,
It's been a while since I worked on Qt and honestly, I have almost forgotten whatever little I knew
A friend asked me this question and since I have no clue about it,so, I thought I would raise the question here and hope you guys will be able to give some suggestions.

His question was 'How do we customise the look and feel (font colour etc)of QGraphicsItem based applications without modifying the application code'?
He also said that Qstyle based customisation is available for QWidget based applications to change the look and feel without modifying the code.But,QStyle won't work for QGraphicsItem based applications.

So,is there any way to change the font,background colour etc of a QGraphicsItem based application without modifying the code?

Thanks in advance for any advice.