set the validation for checkboxes

[ChrisW67]

We don't want to know what you are trying to do; that is evident from the correct code you posted. We want to know why you think it is "not working" and how you determined that.

[sangee]

QDoubleValidator consider for decimal points only not range(18.5 to 39.0).how i set the validation for this LineEdit? I want one example for LineEdit Validation.

[spirit]

There is not standard way (known to me) to achieve this. You should write your own validator.