Set image from computer as a background for QT GUI


I would like display a value over a custom background in gnu radio. In fact, the code should print the value somehow like a speedometer on semi-round. How can I achieve this? Is it possible to implement my idea into an Embedded Python Block which could take a value and then display it over the image? Or should I use the QT GUI Tab Widget (how can I add the picture, the value and display it OK)?

Thank you!

I do know if it is possible with Qt, If it is possible, it won’t be in the core librairy, but in an additional librairy. Or Maybe with KDE.
This might be helpful: