Path: utzoo!utgpu!watserv1!watmath!att!rutgers!usc!wuarchive!zaphod.mps.ohio-state.edu!van-bc!ubc-cs!alberta!mts.ucs.UAlberta.CA!ualtavm!BBOLT
From: BBOLT@vm.ucs.UAlberta.CA (Bob Bolt)
Newsgroups: comp.sys.mac.hypercard
Subject: Protecting individual cards
Message-ID: <988@vm.ucs.UAlberta.CA>
Date: 31 Aug 90 15:46:10 GMT
Reply-To: BBOLT@vm.ucs.UAlberta.CA
Organization: University of Alberta VM/CMS
Lines: 25
Disclaimer: Author bears full responsibility for contents of this article

I have been working on a stack in which I would like to be able to protect
individual cards from being deleted when certain conditions are met, such
as a field containing an entry. If the field is empty, the card can be
Cut or Deleted. If the field contains something, then the card should be
protected. I realize that I can protect the card by clicking the check
box in Card Info, but I want to set this property from a script. The only
way I can see is the following:
 
on deleteCard
   if field fieldName is not empty then
      doMenu "Copy Card"
      doMenu "Paste Card"
   end if
 
end deleteCard
 
Placing this handler in the Background script provides the protection,but
it is not exactly the cleanest way to handle the job and it has the
unfortunate side effect of changing the card id number.
 
If anyone knows of a way to handle this more efficiently, I would appreciate
hearing about it.
 
Bob Bolt
BBOLT@VM.UCS.ALBERTA.CA