I think it is never trully possible to seperate design and logic
IMHO, you should take care to differentiate applicative-logic and GUI-logic, and consider 3 abstraction layers:
- HTML-Template data, aka GUI elements, look-and-feel, skins, whatever you call it.
- GUI-logic, tiny code elements, totally dedicated to data appearance. There you'll use HTML::Template modules or equivalent to handle HTML data from above layer. Taking an OO-approach, you may define here a "widgets" hierarchy of specialized objects.
- Lastly, You'll have applicative-logic dedicated to manage applicative-datas and providing them to users through the help of above layer functionnalities.
| Users |
| HTML-Datas |-->| GUI-logic |
| Applicative-logic |
| Datas |
Pro: Design and logic are separated.
Cons: You'll have to stricly follow the rules of responsability separation when developping the differents layers. Anyway, you'll have a bit more code to produce and support all caveats involvde (more code => more bugs => more tests required => less time).
This kind of slicing gives you the basements to build applications decribed as 'Model-View-Controller' in Design-Pattern litteracy.
Updated:corrected some typos and added schematic.
My two favorites:
If the only tool you have is a hammer, you will see every problem as a nail. --Abraham Maslow
Bien faire, et le faire savoir...
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