undo, wait, nah, I liked it better before, redo it

If you’re like me, you’re constantly running into walls and doing things you shouldn’t be.  Due to this, I need the undo command on almost everything I do.  Marc Clifton has a nice, basic undo /redo framework on implementing this functionality which pretty much requires only three methods.

• Do
• Records current state before action has occured
• Undo
• Moves back to the previous state
• Redo
• Moves to the next state if one is there.

Before we’ve posted about doing in-memory transactions for implementing an undo/redo system.