You could make your choices Hidden text objects which appear when the appropriate option is selected. Then configure each text choice as a button that performs a SetField step. That will clear out older values from the field.
Another option is to set up a script trigger on the drop-down, where when it is changed, it clears out any values from the radio button option field, ensuring that any radio option selected is the only radio option.
And the script trigger requires less setup than my idea!
several suggestions, I have not seen this one:
1. make the "outcome" one field
2. place the field on the layout three times:
with appropriate value list(s) corresponding the 3 drop-down values
with the same hide conditions you have now
You now have a true RADIO button effect regardless of the list used for the selection.
It's the way radio buttons work. Selecting one over-writes any other.
outcome field with referral value list (as radio buttons)
outcome field with assessment value list (as radio buttons)
outcome field with session value list (radio buttons)
then place the appropriate conditions on each instance of the field to match what you already have
And we sometimes forget that FileMaker allows users to "break the rules". If they hold down the shift key while clicking radio buttons, the radio button formatted field now behaves like check boxes and users can select multiple values.
An auto-enter calculation can be used to enforce true Single value only selection should that be necessary for your design.
GetValue ( self ; ValueCount ( self ) )
Thank you all for the various solutions!
The one that I've marked as the correct answer in this case is the one that is, I think, safest for my solution,and how it's been set up over time.
I've set a Script Trigger to, on modifying the drop-down list, Set Field to "" for the three radio button field sets.
That way, if one of the 3 'diary events' with outcome options or one of the 17 events without options is chosen, I can be sure that NO radio buttons, other than any visible on screen to chose from, are checked.
philmodjunk's solution is very effective as well.
I think this behavior of filemaker is a BUG.
Optionfields with radiobuttons should allow ONLY ONE selected item.
'Tis a valid opinion. I agree that it shouldn't allow that behavior. Good thing it's a vague "trick".
Many of us have complained about the shift click behavior in the past. I first learned about this here in the forum from LaRetta and learned how to fix it from Raybaudi.
Perhaps someone should post a product idea and then we all vote it up?
Well, maybe sometimes you could use it. Other times it's easy enough to prevent it with the auto-enter calc.
and, just to wax nostalgic ... do y'all remember the "old-fashioned" car radio, the progenitor of the so-called radio button? You couldn't shift-click those machines.