[Flex & Flash] Drag

[Flex]

Group drag:
http://nightlycoding.com/index.php/2012/04/re-arrange-objects-in-a-vgroup-by-dragdrop-flex-spark/

Custom Drag:
http://stackoverflow.com/questions/1469609/flash-as3-custome-dragging-using-mouse-move-event
http://stackoverflow.com/questions/1353361/problems-replicating-drag-and-drop-with-mouse-events/1353489#1353489
http://stackoverflow.com/questions/11994352/flash-as3-event-listener-for-startdrag-stopdrag