I have a enumeration which contains values 'one','two' and 'three'.
I want to ensure the order in which values are selected in enumeration.
For ex-  I dont want user to select the value 'two' before 'one' . So at first , values 'two' and 'three' will be disabled or will not appear in enumeration. Once the value 'one' is selected the value 'two' will be available for user to select in enumeration. Similarly when 'two' is selected the next value 'three' will be available for user to select.

Any ideas on how to achieve this ?

Thanks
Akshay P