Hi thanks a lot for the replies

I am working on a project, wherein i need to do the following,
1.Receive data pumped from the server at the maximum possible rate.
2.Draw this data on the widget.The data drawn has to be retained for a certain period of time, after which its removed.
3.These data are suppose to be show on different layers depending on their type, Also i should be able to select the objects that are shown in each layer and do certain operations on them.

Currently i am drawing all these data on one widget, each time i get a new data using Qpainter.
Also for layers i thought i will use multiple transparent widgets , is this ok ?

I even studied Graphics View Framework and i feel i need to map these individual data as GraphicsItem on the Scene and display the View.
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.

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?
if any of u have any samples on graphics view please share them other than those in Qt Documentation!
I am also supposed to display MAPS(dgn,tiff and dted files for which OPenGl will be a good option) as one layer., provide zoom, pan facillity.
Is there any specific class, which helps me out in this?

Looking forward to your response