Decide on more useful types to add from QtCore/QtGui

[ahayzen-kdab]

Decide on more useful types to add from QtCore/QtGui (eg QByteArray, QModelIndex, QVector2d, QHash, QVector etc)

QtCore - https://doc.qt.io/qt-6/qtcore-module.html

• QByteArray cxx-qt-lib: add support for QByteArray #392
• QHash -> Explore how to represent container types #347
• QLatin1String - in Qt 6 it's just a view and should you use just QByteArray and QString mainly, do we need this?
• QMap -> Explore how to represent container types #347
• QModelIndex cxx-qt-lib: add support for QModelIndex #391
• QPersistentModelIndex cxx-qt-lib: add support for QPersistentModelIndex #393
• QStringList -> cxx-qt-lib: add support for QStringList #408
• QSet -> Explore how to represent container types #347
• QVector -> Explore how to represent container types #347
• QCoreApplication -> cxx-qt-lib: add Q{Core,Gui}Application, QQml{Application}Engine and use it in example #412
• QMargins -> cxx-qt-lib: various fixes before adding methods to types #419
• QTimeZone -> cxx-qt-lib: add member functions #416
• Global enums ? -> cxx-qt-lib: various fixes before adding methods to types #419
• QObject - for now lets skip as it's simple enough to define type MyQObject in CXX
• ... (we should consider which other common types are useful to maintain)
• enums from the global namespace ? if they are used for overrides in proxies etc

QtGui - https://doc.qt.io/qt-6/qtgui-module.html

• QAction - has a lot of other Qt classes like fonts and icons, lets skip for now
• QMatrix4x4 ? (related to QVectorND)
• QTransform ? (related to QVectorND)
• QVector2D -> cxx-qt-lib: add support for QVector2D, QVector3D, QVector4D #403
• QVector3D -> cxx-qt-lib: add support for QVector2D, QVector3D, QVector4D #403
• QVector4D -> cxx-qt-lib: add support for QVector2D, QVector3D, QVector4D #403
• QGuiApplication -> cxx-qt-lib: add Q{Core,Gui}Application, QQml{Application}Engine and use it in example #412
• ... (we should consider which other common types are useful to maintain)

QtQML - https://doc.qt.io/qt-6/qtqml-module.html

• QQmlApplicationEngine -> cxx-qt-lib: add Q{Core,Gui}Application, QQml{Application}Engine and use it in example #412
• QQmlEngine -> cxx-qt-lib: add Q{Core,Gui}Application, QQml{Application}Engine and use it in example #412
• ... (we should consider which other common types are useful to maintain)
• QQmlComponent (?)

We need to come up with some rules as to which classes we should bridge in cxx-qt-lib, the following should be considered

• Maintenance of the bridge
• Practical use from Rust (eg if you have a clear UI / model split, UI details should not be in Rust?)
• Usage in applications (eg don't wrap classes that are hardly used)
• Enable deriving from other classes (eg QModelIndex and QHash are needed for listmodels)
• Can we easily bridge templated classes ? this was an issue with the CxxQtThread (eg Extern type with generic type parameter  dtolnay/cxx#683 )

[ahayzen-kdab]

For #113 we also need to add types from QtQml, to do this we should ensure that we have features for core, gui, qml in cxx-qt-lib #290

[ahayzen-kdab]

If container classes start using extern "C" blocks then consider questions in #77

[ahayzen-kdab]

Moved container types into #347 as this has separate problems that will take longer to investigate.

[ahayzen-kdab]

Closing via #416