Preferences, singletons

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Create a Preference dialog for fonts and audio output devices

Turn Preferences and SoundOff into singletons.  No matter how many times
you request a new one, the same instance is returned.

Stop using singals on the parent() to access other instances, such as
sound and Preferences.

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This commit is contained in:

Christopher T. Johnson

2023-12-22 10:54:27 -05:00

parent c0482b519c

commit 0adf1d6e44

12 changed files with 325 additions and 31 deletions

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