I was doing the graphics system, you need to edit the graphic after undo, redo, these are my reference papers. Feeling Tingyou help.

重要!!!!!大型CAD软件开发中撤销_重做的实现方法.pdf
重要!!!!!改进的Undo_Redo机制在绘图CAD中的应用.caj
矢量图形编辑系统中Undo与Redo操作的实现.pdf
图形应用系统下Undo_Redo操作的设计与实现.pdf

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