SUMMARY
you can remember undo rule the same to redo
if you want demo rule that you can look up the follow link
http://blog.csdn.net/haibusuanyun/article/details/11353499
SUMMARY
you can remember undo rule the same to redo
if you want demo rule that you can look up the follow link
http://blog.csdn.net/haibusuanyun/article/details/11353499