Le 28/10/2017 �� 16:26, Stephane Ducasse a ��crit��:

I was reading ...
I will see if I can load cassowary in Pharo.

https://github.com/ThierryGoubier/Cassowary

Done two years ago.

Thierry

On Sat, Oct 28, 2017 at 4:21 PM, Stephane Ducasse
<stepharo.self@gmail.com> wrote:

Ok then may be we should give a try to use. Tx for the links.

Stef

On Sat, Oct 28, 2017 at 4:18 PM, Ben Coman <btc@openinworld.com> wrote:

2017-10-27 19:13 GMT+02:00 Stephane Ducasse <stepharo.self@gmail.com>:

I was wondering if there is a layout that we can use to propose
alternate placing layout for widgets in spec?

Like...
attached to�� the left 10pixels rubber band box or fixed size box
10pixels attached to the right.

On Oct 27, 2017, at 12:59 PM, Pavel Krivanek <pavel.krivanek@gmail.com>
wrote:

Maybe we should check cassowary

https://croisant.net/blog/2016-02-24-ui-layout-constraints-part-1/#ui-constraints

On Sat, Oct 28, 2017 at 4:48 PM, Stephane Ducasse <stepharo.self@gmail.com>
wrote:

Pavel I do not think that cassowary is good for us.

Do you mean Cassowary in particular, or constraint based UI in general?

My naive first impression is, if Cassowary is good enough for Apple...
https://news.ycombinator.com/item?id=9846992
https://www.quora.com/Should-I-use-Auto-Layout

and Google (search here for "solver")...
https://academy.realm.io/posts/cool-constraintlayout-droidcon-boston-2017/

such that "in 2016, both iOS and Android have first-party layout systems
based on Cassowary."
https://www.bignerdranch.com/blog/constraintlayout-vs-auto-layout-how-do-they-compare/

then it seems worth some analysis, and discussion of better alternatives.


Coincidentally, I see a Smalltalk implementation is available...
http://www.squeaksource.com/Cassowary.html
https://constraints.cs.washington.edu/solvers/cassowary-tochi.pdf


For balance, some points against AutoLayout, but some alternatives also seem
to use Cassowary solver...
https://www.reddit.com/r/iOSProgramming/comments/4t6kd5/why_i_dont_use_autolayout/
https://www.bignerdranch.com/blog/constraintlayout-vs-auto-layout-how-do-they-compare/
https://makeapppie.com/2015/10/28/why-stack-views-are-your-best-friend-if-you-hate-auto-layout/
https://cocoacasts.com/working-with-stack-views/


cheers -ben