kBottomEdge
BGroupView((location & (kTopEdge | kBottomEdge)) != 0
location = kBottomEdge;
location = kBottomEdge;
case kBottomEdge:
case kBottomEdge:
case kBottomEdge:
if ((location & (kTopEdge | kBottomEdge)) != 0)
return (location & (kTopEdge | kBottomEdge)) != 0