Disabling one button of a radio button group...

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hp - 25 Jun 2005 22:39 GMT

So I have a NIB defining a radio button group, but I would like to
control whether some buttons will be allowed or not, based on the state
of my program.

But I cannot get this figured out? Can anyone offer any hints?

The Carbon Programming book talks about a "Non-Auto-Toggling Variant" -
which would force me to manage all the button pushes, but I cant even
figure out to set that characteristic in Interface Builder.

Anyone?

TIA,

-harry

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larry@skytag.com - 26 Jun 2005 01:50 GMT

> So I have a NIB defining a radio button group, but I would like to
> control whether some buttons will be allowed or not, based on the state
> of my program.
>
> But I cannot get this figured out?

Is that supposed to be a question? ;-)

> Can anyone offer any hints?

Iterate over the subcontrols of the radio button group to get the radio
button controls. You can then enable and disable them individually.

> The Carbon Programming book talks about a "Non-Auto-Toggling Variant" -
> which would force me to manage all the button pushes, but I cant even
> figure out to set that characteristic in Interface Builder.

I've never heard of that. Old book, BTW.

You might find Apple's carbon-dev list more useful than this one, which
tends to be more for CW-related issues.

Larry

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hp - 26 Jun 2005 17:11 GMT

> > So I have a NIB defining a radio button group, but I would like to
> > control whether some buttons will be allowed or not, based on the state
[quoted text clipped - 3 lines]
>
> Is that supposed to be a question? ;-)

uhhhhh, yup. I guess not only could I figure what to do, I couldnt even
figure out how to compose the question :-)

> > Can anyone offer any hints?
>
> Iterate over the subcontrols of the radio button group to get the radio
> button controls. You can then enable and disable them individually.

Cool! This is the hint I was looking for! Did as you said and I get the
buttons disabled like I wanted, although the text button label does
*not* get greyed out as I would have expected. This is the basic code
fragment:
...
    ControlRef button = NULL ;
    err = GetIndexedSubControl(radioButtons, 1, &button) ;
    if (button)
        DisableControl(button) ;
...
Is there something else I need to do to get the "grey-out" appearance?
[OS10.3.8] Tiger seems to be better "behaved" and gives the greyd out
appearance

> You might find Apple's carbon-dev list more useful than this one, which
> tends to be more for CW-related issues.

You're right ... I just wish that when I would search the Developer
site, I could get the lists included within the search. Moreover, I've
never figured out how to search the list archives at all - seems like
one can only browse, which I simply do not have the patience for :-)

- harry

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larry@skytag.com - 27 Jun 2005 01:16 GMT

> Cool! This is the hint I was looking for! Did as you said and I get the
> buttons disabled like I wanted, although the text button label does
[quoted text clipped - 8 lines]
> Is there something else I need to do to get the "grey-out" appearance?
> [OS10.3.8] Tiger

10.3.8 is Panther, not Tiger.

> seems to be better "behaved" and gives the greyd out appearance

I don't know any way to do this. I don't know if the lack of dimmed
text is a new interface decision or a bug. Post a question about it to
the carbon-dev list and ask. :-)

>> You might find Apple's carbon-dev list more useful than this one, which
>> tends to be more for CW-related issues.
>
> You're right ... I just wish that when I would search the Developer
> site, I could get the lists included within the search. Moreover, I've
> never figured out how to search the list archives at all

Clicking the Search link works for me:

http://lists.apple.com

> - seems like one can only browse, which I simply do not have the patience for
> :-)

I was suggesting that you subscribe to the list and post your questions
there, not search the archives. I almost never search the archives.

Larry

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Mac Forum / Programming / CodeWarrior / June 2005

Disabling one button of a radio button group...