// Aim is to zoom into one of the grids of icons using a viewport layout.

  // Create a anchor layout and grid layout into the parent anchor layout and 
  // populate it with application icons.
 
  // The viewport layout sits in the middle of the screen.
   parent->SetRelativeAnchorRect(1, EAlfAnchorOriginHCenter, EAlfAnchorOriginVCenter, TAlfRealPoint(-0.2, -0.2),
                                    EAlfAnchorOriginHCenter, EAlfAnchorOriginVCenter, TAlfRealPoint(0.2, 0.2));
   
   // Create the viewport.
   CAlfViewportLayout* viewport = CAlfViewportLayout::AddNewL(*this, parent);
 
  // Set our virtual coordinate system to be based on the number of items in the grid (KNumGridItems).
   viewport->SetVirtualSize(TAlfRealSize(KNumGridItems, 1.0), 0);
   
   // Set the size and position of the viewport to look at the middle icon in the list.
   viewport->SetViewportSize(TAlfRealSize(2, 1.0/6.0), 0);
   viewport->SetViewportPos(TAlfRealPoint(TReal32(KNumGridItems/2)-1.0f, 5.0/12.0), 0);
   
   // This anchor layout will contain a strip of large icons clipped by the viewport window.
   CAlfAnchorLayout* zoomedParent = CAlfAnchorLayout::AddNewL(*this, viewport);     

Since

S60 v3.2