content: sub ShowGridScreen()
      m.GridScreen = CreateObject("roSGNode", "GridScreen")
      m.GridScreen.ObserveField("rowItemSelected", "OnGridScreenItemSelected")
      ShowScreen(m.GridScreen) ' show GridScreen
  end sub
  
  sub OnGridScreenItemSelected(event as Object) ' invoked when GridScreen item is selected 
      grid = event.GetRoSGNode()
      ' extract the row and column indexes of the item the user selected
      m.selectedIndex = event.GetData()
      ' the entire row from the RowList will be used by the Video node
      rowContent = grid.content.GetChild(m.selectedIndex[0])
      ShowDetailsScreen(rowContent, m.selectedIndex[1])
  end sub
  
  