Promoting to Multiple Custom Widgets

[stampede]

I think if I can avoid the overdrawing on top of another

Use layouts and nothing like that will happen.
Maybe I didn't understand you correctly, can you attach a picture of how it should look like ?

[beginQT]

I am not able to attach the picture..wil try it later.
basically its something like screens must be developed using opengl in the middle of the screen which takes 600*600 out of 800*600 portion of the screen.
For doing this I need to switch between different opengl screens dynamically depending on the feature that is active or requested for. Its an Navigation app where user would set the destination and through that search and calculation status would be shown in the screen with opengl and along with that some polygons and some curves which looks like some roads and pavements would be shown..

I hope you got what I am trying to do.

And what layouts you are talking about? I have only one layout (same portion) where all the stuff must be drawn.

Thanks!