Rational
it is somehow frequent to have to manual compute some number before putting it in the input widget.
Proposal
have a widget that allow user to input simple formula, like (210+35)/0.20, and let the client compute the value.
- final value computed client side – before sending the value server-side or when the widget loses focus
- simple operators only:
+-*/and() - rounding ?
as it is client side operation, it should be done for gtk client and for sao.