Does anyone know of a VLisp program that senses if the drawing database has

Does anyone know of a VLisp program that senses if the drawing database has
changed and therefore to tricker an event (such as an AutoSave if the
savetime has lapsed)? I simply will invoke something like (command "save"
"Saved" "Y") if it is time to do an AutoSave and save the current file to a
dwg called "SAVED.DWG".

I know there is an AutoSave feature in AutoCAD but I want this option as
well.

********** I am happy to pay for it if anyone has this. **********

Thanks

Andreas

 

The DBMOD system variable knows whether the database (or some other things)
has (have) changed. You can probably get a Vlisp or other routine to check
the value of DBMOD periodically, with a reactor of some kind, but I would
guess it has to be triggered by doing something else to react to. (I
haven't worked with reactors, so I'm not sure what the possibilities are.)

You could build such a check into some frequently-used command. Way back
before there was AutoSave, I programmed our digitizer-puck's cancel button
to cancel AND then check the drawing timer, and if it had exceeded some
defined time, to remind you that you might want to save the drawing. That
way any time you cancelled anything (which is frequent enough, especially
since I built lots of common commands to repeat automatically), that check
would be performed, but it never interfered with any command in progress
since it was built to follow a cancel. Whenever you saved, it would reset
the timer. It still left you the option not to save, if you had some reason
not to, but at least you would be regularly reminded. But we dropped that
once AutoSave came along.

Maybe it's possible to redefine what AutoSave does. That would have the
advantage that it would happen regularly without depending on any other
particular thing to trigger it.

Kent Cooper, AIA

.....

 

Thanks Kent. I used to have a command for Autosave as well back then but I
also dropped it when Autosave came in. It also checked a whole lot of
commands like erase, copy, move etc.... however I was hoping Vlisp will
help. Unfortunately I am not up with VLISP enough to attempt it in reactors
so I need a little head start from someone. At the end of the day we may
have to go with the old routine. Thanks for the DBMOD hint as well.

Andreas