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Only One Checkbox Selected Expression
I have three checkboxes on a layer.
Only one box should be checked at a time.
I wrote an expression to uncheck the other two boxes when one is checked.
It works until the playhead is moved then it reverts to the original values of the checkboxes.Can anyone help me figure this out?
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5 Replies
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My advice–think of another way to do what you’re trying to do. I don’t think there’s a stable solution to the “force checkboxes to act like radio buttons” problem.
Dan
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Thanks
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I had the same problem once and I think Dan is right, there is no such thing in AE as “radio button code”. The solution I found was rather elegant: Pop-up menus.
These pop-ups behave just like radio buttons, the only downside is that they’re not available as expression controls yet within AE (like Point, Color, Angle, etc.), so you must built a Pseudo Effect first and place them there. I use BatchFrame’s Custom Controls Creator and it works pretty well. I recommend you to watch all the tutorials so you can see how it works.
Cheers.
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This seems to do the trick:
a=effect("a")("Checkbox");
b=effect("b")("Checkbox");
c=effect("c")("Checkbox");if (a+b+c == 0)
{ 1 }
else if (a+b+c > 1)
{ 0 }
else { value }
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Moving forward on the timeline, the checkbox reverts to “a”.
Kalleheikki Kannisto
Senior Graphic Designer
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