29 Apr
2008
29 Apr
'08
7:36 p.m.
I have commands that I would like to make undoable. Is it possible to wrap the commands within an "undoable" environment as suggested in http://www.ceteva.com/forum/viewtopic.php?t=17
I imagine something like this (but wouldn't know where to start):
A>>setFoo: aFoo Undoable newOn: [ foo := aFoo ]
A>>setBar: aBar Undoable newOn: [ bar := aBar ]
a := A new foo: 0; bar: 0; yourself. a setFoo: 5. a setBar: 10. Undoable undo. "a bar == 0" Undoable undo. "a foo == 0" Undoable redo. "a foo == 10"
Thanks - Sophie