BBOLT@vm.ucs.UAlberta.CA (Bob Bolt) (08/31/90)
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.CAchh9@quads.uchicago.edu (Conrad Halton Halling) (09/01/90)
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 way to solve this problem is to put a doMenu handler into the background script. Assuming the background field has the name "myField", here is a script for you to use: on doMenu menuItem -- put this handler into the background script if menuItem is "Cut Card" or menuItem is "Delete Card" then if fld "myField" is empty then pass doMenu end if else pass doMenu end doMenu This script will not pass doMenu if fld "myField" is not empty; hence, the cut or delete command will not take place. When you use a doMenu handler, it is _essential_ that you put "else pass doMenu" in the last line of the handler. Otherwise, no menu command will work, and you can't do anything. This sort of handler gives you alot of control over what the user can or can't do. -- Conrad Halling chh9@midway.uchicago.edu
jdevoto@Apple.COM (Jeanne A. E. DeVoto) (09/01/90)
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. ______________________________________________________________________ Apple Computer and I are not authorized | CI$: 72411,165 to speak for each other. |