Re: Undo/Redo in Web Application
Re: Undo/Redo in Web Application
- Subject: Re: Undo/Redo in Web Application
- From: LD <email@hidden>
- Date: Wed, 3 Aug 2005 02:30:04 +1000
Hi there,
On 02/08/2005, at 1:44 AM, Jerome Chan wrote:
Is there a reason why Undo/Redo has not been done on most of the
Web Applications I've seen?
Context is everything ;-) i.e., What have you seen?
Well, unlike normal desktop applications, Undo/Redo for a web-app
(hooked into a db) must be treated within the context of and
compliance to the infamous ACID tests...
Moreover, Undo/Redo only makes sense in certain contexts of a web-
app. i.e., only within a session[1]. Furthermore, the boundaries of
undo/redo are logically found within the time of last ec.saveChanges
and now. i.e., unsaved changes can be rolled-back (or undone and then
redone if desired).
So, this is quite commonly done from what I've seen :-) At least for
the Admin console in my app, people have the opportunity to undo
changes that haven't been committed.
[1] Naturally if in a direct action you're commiting something to the
db you'd also discard changes if an exception occurs.
with regards,
--
LD
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