Layered Application

[wysota]

Also for layers i thought i will use multiple transparent widgets , is this ok ?

Not really.

But i am not very clear whether to add the new data to already existing scene or create a new scene , also how to delete these data after certain period.

Use a single scene and add or remove items on demand. You remove them by deleting them or using scene API for removing items (guess how the method is called).

so can any of u suggest how this porting could be done. will it be easier to do the porting to graphic view from QPainter for my requirement?

I say port to GV.