How to use OCC view of salome in my custom module

I am creating a module of salome. I want interact with the occ view that is created by other module(like Geom, Smesh..etc). Actually I want to add some geometry object from my module to the occ view created by other module.

I can change the background of the occ view created by other module from my module like below....

OCCViewer_ViewWindow* pOCCViewWindow = dynamic_cast<OCCViewer_ViewWindow*>(getApp()->activeViewManager()->getActiveView());
OCCViewer_Viewer* pOCCViewer = dynamic_cast<OCCViewer_Viewer*>(pOCCViewWindow->getViewManager()->getViewModel());
OCCViewer_ViewPort3d* pOCCViewPort3d = pOCCViewWindow->getViewPort();
pOCCViewPort3d->setBackgroundColor(QColor(25, 25, 25));

similarly how can I draw or add objects in that occ view from my module.

regards,

Aminul