Migrate qopenhd from qt 5 to 6

[pilotnbr1]

Qt 5.15 is getting old and now looking into migrating qopenhd to Qt 6.X

PROS:

• dependecy future proofing
• get qt shader tools. But no present plans to use them

CONS:

• more work... some of it will be platform specific. Nobody currently debugs all platforms like Stephen
• mapbox-gl is not a supported plugin. MaplibreGL looks to be the new solution

Current errors seen while upgrading:

1. Mapbox plugin related
2. OSM plugin for maps error probably related to Mapbox
3. QT x11extras (https://doc.qt.io/qt-6/extras-changes-qt6.html) solution will be somewhat platform dependant
4. QT Location - no plans to port.. Must switch to QT positioning
5. QT gamepads depreciated. probably not a big deal as we use 3rd part qt joystick But need to remove gamepad code
6. QT android extras will probably need some attention for android
7. QT openGL will need attention most likely
8. QT speech supposedly being ported in qt 6.4
9. Qt Windows Extras might need attention for windows

[pilotnbr1]

Maplibre is not really targetting qml. The efforts to get it to work on QML have required QT location. Qt Location is also depreciated in QT 6. So the only working Maplibre does a work around using "MSVC" and the performance sounds like its bad https://github.com/ntadej/qt-geoservices-maplibre

Not having mapping is deal breaker for me while weighing 5.15 vs 6.x . As of now does not seem worth the effort to switch.

[pilotnbr1]

ArcGIS Runtime API for Qt might be an option for mapping in qt6. We would be getting back into needing an api key/token . Not clear on how that distributes when its deployed in their "essentials" plan

EDIT... another dead end for now-

"Qt Framework for Linux minimum: 5.15.2 or higher, Qt 6 is not currently supported."

[pilotnbr1]

QT 6.2 seems to be getting some map support using maplibre as a plugin and a refactor of qt location. Not sure about linux support.
https://bugreports.qt.io/plugins/servlet/mobile#issue/QTBUG-96795

To try it need QtPositioning and QtShaderTools which are not installed by default

I'm not on Windows, so you might need to adjust the commands a bit. But in general here is what you need to do:

1. Clone the qtlocation repo and all the submodules into some directory:

git clone git://code.qt.io/qt/qtlocation.git
git submodule update --init --recursive
2. Create a directory for building QtLocation, and use qt-configure-module utility from Qt installation to configure the module properly

mkdir qtlocation_build
cd qtlocation_build
/bin/qt-configure-module.bat
3. Build the module and install it (call it in the same build directory)

cmake --build . --parallel
cmake --install .
I think you can also build the module in QtCreator. To do that, after executing step 2, just open the module's main CMakeLists.txt in QtCreator, and specify your qtlocation_build directory as a build directory while configuring.

P.S.: Of course you need to have git and CMake pre-installed for that.

[pilotnbr1]

qt 5 works with cmake. So not a problem switching away from qmake

[raphaelscholle]

We updated to 5.15.4, so I think with all it's problems we're currently not updating to 6.x
this topic can be opened in the future when qt6 is more "stable"

[hadogenes]

Will this issue will be reopened, because Qt5 is now unmaintained
https://endoflife.date/qt

[raphaelscholle]

we can reopen this and i can say that we're already working on it