Both sides of the icon could easily drag, but about not interchangeable, set the drag and drop constraints, the need to type the same to each other drag. I have not written a large-scale MMORPG game, do not know what really needs what kind of components, play, whatever the first to be simple. The components are lightweight components to meet the basic needs of the general game.

com\yy\rpg\base\GameObject.as
...\..\...\entity\ItemEntity.as
...\..\...\.vent\GameEvent.as
DragbleItemBlock.as
DragbleItemBox.as
DragbleItemBox.fla
DragbleItemBox.swf
Main.as
com\yy\rpg\base
...\..\...\entity
...\..\...\event
...\..\rpg
...\yy
com

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