[Pharo-project] Fwd: about setting and preference.

Alain Plantec alain.plantec at free.fr
Mon Sep 21 08:36:40 EDT 2009

just forgot to indicate the entry point.
In order to open the setting browser:
SystemSettingBrowser open.


Alain Plantec a écrit :
> Hi all,
> I've changed the new setting implementation.
> The new proposition is attached.
> I think that this  implementation is in sync with Lukas remarks;
> and yes, I think it is much better now, thanks!
> I also removed PragmaHandler and SettingHandler classes as Stephane 
> suggested.
> It temporarily includes several (stupid) examples for testing purpose.
> Comments have not yet been changed.
> I will do it asap.
> Remarks, comments etc are welcome.
> Cheers
> Alain
> Lukas Renggli a écrit :
>>> - A setting with value is an instance of SettingValue or of one of its
>>> subclasses. Such a setting holds a useful global system parameter and
>>> is made persistent: it is stored in a class variable which is
>>> initialized by the method that declares the setting.
>> I think the problem with this proposal is that it mixes the model (the
>> value of the setting) and the meta-model (the model of the setting).
>> This is problematic because then all code depends on the settings
>> package and when reading/writing settings application code must be
>> aware of the indirection introduced through the setting.
>> Why isn't a setting simply a variable local to the package, and the
>> setting-description a separate object (method) that can also be
>> packaged separately?
>>   Lukas
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