Created
April 12, 2019 12:30
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| class IUndoRedo(metaclass=ABCMeta): | |
| """The Undo Redo interface""" | |
| @abstractstaticmethod | |
| def history(): | |
| """the history of the states""" | |
| @abstractstaticmethod | |
| def undo(): | |
| """for undoing the hsitory of the states""" | |
| @abstractstaticmethod | |
| def redo(): | |
| """for redoing the hsitory of the states""" |
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