QKdeThemePrivate: refactor reading of KDE settings

KDE settings locations and keys were hardcoded in QKdeThemePrivate.
readKdeSetting() was implemented as a static method, because it was
called from the static readKdeSystemPalette().
It expects a QStringList argument with the KDE settings directories,
an int representing the KDE version, as well as a QHash with settings
passed as a reference.

Class members exist for settings directories and version. They have to
be passed for each call. The hash containing settings objects will be
created on the stack of each function making calles to
readKdeSetting(). The settings key, including subsections, was passed
as a QString.

Implement enumerations for all KDE setting types and settings.
Derive subsection from the settings type.
Change the signature of readKdeSetting() from a string to the new
enumeration.
Implement a non static override of readKdeSetting, to avoid passing
data memebers on each call.
Implement a mutable has for KDE settings, to enable caching across
functions in the future.

This patch does not change any behavior.

Task-number: QTBUG-125285
Pick-to: 6.7
Change-Id: Ic0320853e08e82dd83bdba1e7765a1e5c6ffb384
Reviewed-by: Christian Ehrlicher <ch.ehrlicher@gmx.de>

0 files changed, 0 insertions, 0 deletions