I need several fields that will be calculated at runtime like Concat but (a) based on PHP code (b) it should be visible & locked in admin UI. I'd also use this filed in custom Listers. Example - "total price" which is calculated based on some logic and fields inside "order" page as well as fields outside of the page.
Should I develop new Fieldtype? Or there is something ready to use in PW 2.5?