Three stage checkbox?

[Björnke von Gierke]

Any form of one object having three stages is confusing and extremely 
nonstandard. Use 3 radiobuttons instead. Short description about how to 
do that:
1. make 3 radiobuttons, name them "Yes", "No" and "Don't know"
2. group them
3. use the "hilitedButtonName" of the group like this:
put the hilitedButtonName into AnswerToThreefoldQuestion

As for the line-trough checkboxes:
They should only be used in cases where you have a hierarchy of 
checkboxes and indicate that some, but not all of the checkboxes in the 
branch of the lined checkbox have been checked.
See also the screensaver activation preference in Mac OS X. They need 
to include a lengthy explanation about why there are three states of 
these checkboxes.

On Dienstag, Feb 3, 2004, at 06:37 Europe/Zurich, Sarah Reichelt wrote:

> Hi All,
>
> I have a need for a three-stage checkbox, in my case signifying 
> "Definite yes", "Definite no" and "Don't know yet". This needs to run 
> on Macs only (OS 9 & X). I know that on Macs, you can have a checkbox 
> that is either empty, ticked or has a line through it. If I could get 
> those three options, I'd be fine but does anyone know how?
>
> Failing this, I guess I'll have to use normal buttons and switch their 
> icons instead, but a series of checkboxes is much easier to read & > set.
>
> TIA,
> Sarah
>
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