[openlp-dev] Changes to Settings code.

[Tim and Alison Bentley]

Over the last few months work has been progressing to improve the
performance of OpenLP at startup.  The main culprit has been Settings()
which we believed was a singleton but turned out to be a plain object.

In the main codebase today there are now two new ways to get a settings
object.  If your object extends RegistryProperties then all you need to do
is use self.settings.

If your object does not extend RegistryProperties add self.settings =
Registry().get('settings')  to your constructor and then access
self.settings.

Clean up work is underway but no new code should be added using the
Settings()  method.

In a parallel development, the definition of all settings has been moved to
the central settings.py file.  This means we have one place for the
definitions (and no duplicates)!


-- 
Tim and Alison Bentley
Home at TRARBentley.net
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