QtCreator errors with QtGraphs QML

SGaist

@Tobias83 I just realized you have 6.7. Qt Graphs went out of tech preview with 6.8.

Tobias83

import QtGraphs 2.12

Tobias83

@SGaist said in QtCreator errors with QtGraphs QML:

Graphs went out of tech preview with 6.8

What does that mean?

On my Computer I have libQt6Core6 6.8.2-3.2. I thought the libs are downward compatible. Should I change

find_package(Qt6 6.7 REQUIRED COMPONENTS Qml Core Quick Graphs)

With changing in

find_package(Qt6 6.8 REQUIRED COMPONENTS Qml Core Quick Graphs)

there is no change.

Tobias

SGaist

How did you install Qt ?
Which packages do you have ?

Tobias83

@SGaist I think its not up to Qt, because QtCharts worked for me. But maybe there is a devel package for qml needed as I wrote ...

SGaist

That's why I am asking how you installed Qt.

Tobias83

@SGaist I have installed Qt via system installation, because I have OpenSuse Tumbleweed with KDE Plasma as OS. The packages are updated via the official repositories of OpenSuse. Qt Creator is also installed via the repos.

SGaist

Are you able to build and run any of the Qt Graphs examples ?

Tobias83

@SGaist OK, the hellographs example is working: hellographs on https://code.qt.io
I tried to make the same cmakelists.txt, but I don't know, whats the difference between my project and hellographs. There are some warnings in QtCreator like:
qabstractaxis.h:17: Warnung: Multiple C++ types called QAbstractAxis found!

or

/usr/lib64/cmake/Qt6Core/Qt6CoreMacros.cmake:792:EVAL:1: Warnung:
Call-Stack:
/usr/lib64/cmake/Qt6Core/Qt6CoreMacros.cmake:792:EVAL:1 (qt6_finalize_target)
/usr/lib64/cmake/Qt6Core/Qt6CoreMacros.cmake:823 (_qt_internal_finalize_executable)
/usr/lib64/cmake/Qt6Core/Qt6CoreMacros.cmake:745 (cmake_language)
/usr/lib64/cmake/Qt6Core/Qt6CoreMacros.cmake:745 (qt6_import_qml_plugins)
/home/tobias/Git-dev/HardCore/CMakeLists.txt:72 (qt_add_qml_module)
/usr/lib64/cmake/Qt6Qml/Qt6QmlMacros.cmake:1241 (qt6_add_qml_module)
/usr/lib64/cmake/Qt6Qml/Qt6QmlMacros.cmake:708 (__qt_internal_setup_policy)
/usr/lib64/cmake/Qt6Qml/Qt6QmlMacros.cmake:4216 (message)

or

/usr/lib64/cmake/Qt6Core/Qt6CoreMacros.cmake:792:EVAL:1: Warnung: The qml plugin 'qmlplugin' is a dependency of 'simHardcoreQt6', but the
link target it defines (Qt6::qmlplugin) does not exist in the current
scope. The plugin will not be linked.
Call-Stack:
/usr/lib64/cmake/Qt6Core/Qt6CoreMacros.cmake:792:EVAL:1 (qt6_finalize_target)
/usr/lib64/cmake/Qt6Core/Qt6CoreMacros.cmake:823 (_qt_internal_finalize_executable)
/usr/lib64/cmake/Qt6Core/Qt6CoreMacros.cmake:745 (cmake_language)
/usr/lib64/cmake/Qt6Core/Qt6CoreMacros.cmake:745 (qt6_import_qml_plugins)
/usr/lib64/cmake/Qt6Qml/Qt6QmlMacros.cmake:4216 (message)

SGaist

Are you trying to use both Qt Graphs and Qt Charts at the same time ?

Tobias83

@SGaist If I remove all the QtCharts promts in CMakeLists.txt and Main.qml, the error remains.

SGaist

Did you nuke the build folder after these changes to ensure you start from a clean state ?

Tobias83

@SGaist I moved the build directory:

mv build-HardCore-Desktop-Debug/ build-HardCore-Desktop-Debug_old/

Than I executed cmake file again, but I can't build the project and the project is not structered anymore. There is only a file list at the left site. The error in German language is:
:-1: Fehler: CMake-Konfiguration "Debug wurde nicht gefunden. Verfügbare Konfigurationen: "".
Stellen Sie sicher, dass der Wert der CMAKE_BUILD_TYPE-Variable derselbe wie der des "Build-Typ"-Felds ist.

... cmake configuration Debug was not found. Ensure that the variable value CMAKE_BUILD_TYPE is the same as that of the Build Type area.

jsulm

@Tobias83 Did you try to build in release mode?

Tobias83

@jsulm In release mode, there is also the error unknown component for the QtGraphs prompts.

SGaist

Even if it was already done once:

Exit Qt Creator
Delete the CMakeLists.txt.user file from your sources
Nuke all build folders
Start Qt Creator and reconfigure your project

Tobias83

@SGaist OK, I did so and there is no change: unknown component )-:

SGaist

Since you wrote that the example is building successfully, what about copying it and the gradually replace its content with the one from your project ?

Tobias83

@SGaist OK, I coppied the main.qml file from the hellographs example to my project. And the GraphsView prompt was recognized. I found out, what the problem with my Main.qml was. I had to change the import commands:
instead of

import QtGraphs 2.12

change to

import QtGraphs

helped (-:

Thank you very much!!!

But, I have still a question: How can I use the XYModelMapper? Is there a good example? The usage differs to QtCharts, specially xSection : qsizetype ...

Tobias