Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!apple!jdevoto
From: jdevoto@Apple.COM (Jeanne A. E. DeVoto)
Newsgroups: comp.sys.mac.hypercard
Subject: Re: Protecting individual cards
Summary: cantDelete property
Message-ID: <44475@apple.Apple.COM>
Date: 1 Sep 90 05:39:29 GMT
References: <988@vm.ucs.UAlberta.CA>
Organization: Apple Computer Inc, Cupertino, CA
Lines: 27

In article <988@vm.ucs.UAlberta.CA> BBOLT@vm.ucs.UAlberta.CA writes:
>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 property you're looking for is cantDelete. It is a property of cards,
backgrounds, and stacks, and corresponds to the checkbox in the Info
dialog. One way to do what you want is to place the following in the
field's script:

  on closeField
    if target is empty then
      set the cantDelete of this card to false
    else
      set the cantDelete of this card to true
    end if
  end closeField
-- 
========= jeanne a. e. devoto ========================================
 jdevoto@apple.com     |  You may not distribute this article under a
 jdevoto@well.sf.ca.us |  compilation copyright without my permission.
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 Apple Computer and I are not authorized      |        CI$: 72411,165
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