'undoInfo -ock/cck' using Maya API?

[highend3djojan-]

Hi,

'undoInfo -ock' and 'undoInfo -cck' combination can be used in Maya2009 MEL procedures to
consider the whole set of commands (between them) inside the procedure as a single entry in
Maya's undo queue. But this ock/cck flags are unavailable in Maya2008. So what can do in
2008 to achieve this result? Or what can we do in Maya2008 to take a complete procedure as
a single entry in undo queue? Is this possible by using Maya API?
Thank you.

[highend3djojan-]

Hmm.. it can be done using MDGModifier class (commandToExecute, doIt, undoIt).  BUT!!
How can I add this undoIt/doIt to Maya's undo/redo queue? i.e; if we call MDGModifier's doIt() once and then do 3 actions on viewport, then if we press ctrl+z repeatedly, will MDGModifier's undoIt() be called after undoing the 3 actions by any way? How can i map ctrl+z to this undoIt() like this?
Plz help.

[joojaa]

you can make it a mel procedure then its one entry.

Anyway dont even think of misxing the notions of mel and the api togetehr they have nothing in common. Or not atleast this way,

[highend3djojan-]

yea, i cud make it one procedure. but eventhough, HOW can i include this chunk into Maya's undo queue? i.e; it shud work with ctrl+z, ALONGWITH other usual Maya actions.

[joojaa]

when the procedure is called it does the job and makes one chunk in undo queue, hence it also undoes in one go.

[highend3djojan-]

ok but in tht case, v 've to write custom command implementing undoIt and doIt by using MDGModifier, rt?
i doubted its possible in any way to undo "our chunk" by ctrl+z (alongwith other Maya actions). i.e; by only using commandToExecute, doIt, undoIt methods in MDGModifier inside our Python procedure with our main Python function as argument to commandToExecute, and make ctrl+z as hotkey to undo it.

[joojaa]

Why wouldt it work i mean if its done in one chunk its undone in one chunk. Just as long as the command that goes into maya undo queue is one item. Ie one call to function or a single script its then undone in exact same chunk one go.

See mayas undo works on mel, so as long as its one call in mel, its one undo in mel. In api the added hardness is that you must implement the reverse operation yourself.

So maya will undo it in one chunk as long as you dont put more stuff into the undo queue.