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Add some advice for dealing with unset/default values.

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Matthias Clasen 2010-04-16 23:56:40 -04:00
parent f33a45e1fb
commit 41c1f3dd2b
1 changed files with 11 additions and 0 deletions
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docs/reference/gio/migrating.xml
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@ -247,6 +247,17 @@ start_monitoring_trash (void)
</tgroup>
</table>
</para>
<para>
There is a pattern that is sometimes used for GConf, where a setting can have
explicit 'value A', explicit 'value B' or 'use the system default'. With GConf,
'use the system default' is sometimes implemented by unsetting the user value.
</para>
<para>
This is not possible in GSettings, since it does not have API to determine if a value
is the default and does not let you unset values. The recommended way (and much
clearer) way in which this can be implemented in GSettings is to have a separate
'use-system-default' boolean setting.
</para>
</section>
<section>