Information about the changes between Qt4 and Qt5 can be found in the dist/changes-5.x of each submodule
Changes regarding changes to kdelibs can be found at kdelibs/KDE5PORTING.html
KDE Frameworks now enforces -DQT_NO_SIGNALS_SLOTS_KEYWORDS
This means the "signals" and "slots" keywords will not work. They should be replaced by Q_SIGNALS and Q_SLOTS respectively.
In Frameworks 5 any string on its own such as "foo" will not be automatically converted to a QString. Instead, you should use one of:
- QLatin1String() for string comparisons i.e (if myString == QLatin1String("SomeText))
- QStringLiteral for string creation i.e QIcon::fromTheme(QStringLiteral("document-new"));
- tr() for translatable strings in frameworks that cannot use i18n
- i18n for translatable strings in frameworks that can use i18n
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unless otherwise noted.