QtCreator errors with QtGraphs QML
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@SGaist The QtCreator says "unknown component". And the runtime error is
QQmlApplicationEngine failed to load component
qrc:/qt_qml/Main.qml:53:13: LineSeries is not a typeTobias
wrote on 31 Mar 2025, 18:58 last edited by JoeCFD@Tobias83 said in QtCreator errors with QtGraphs QML:
LineSeries
do you have
import QtCharts 2.8
in Main.qml?
https://doc.qt.io/qt-6/qml-qtcharts-lineseries.html -
@SGaist If I can say this: I think its not a problem with my code. I think there is some software package for QtGraphs missing. In comparism with QtCharts, there is no
- libQt6GraphsQml6 -> /usr/lib64/
- qt6-graphsqml-devel -> /usr/include/qt6/QtGraphsQml/
When I tried to use QtCharts before, the remaining prompts were also not found by QtCreator, before I installed the corresponding devel packages from the repo ...
Tobias
@Tobias83 I just realized you have 6.7. Qt Graphs went out of tech preview with 6.8.
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@Tobias83 said in QtCreator errors with QtGraphs QML:
LineSeries
do you have
import QtCharts 2.8
in Main.qml?
https://doc.qt.io/qt-6/qml-qtcharts-lineseries.html -
wrote on 3 Apr 2025, 18:53 last edited by Tobias83 4 Mar 2025, 18:55
@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
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How did you install Qt ?
Which packages do you have ? -
That's why I am asking how you installed Qt.
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Are you able to build and run any of the Qt Graphs examples ?
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wrote on 8 Apr 2025, 14:23 last edited by
@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) -
Are you trying to use both Qt Graphs and Qt Charts at the same time ?
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Did you nuke the build folder after these changes to ensure you start from a clean state ?
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wrote on 9 Apr 2025, 19:24 last edited by
@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.
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@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.
@Tobias83 Did you try to build in release mode?
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Even if it was already done once:
- Exit Qt Creator
- Delete the
CMakeLists.txt.userfile from your sources - Nuke all build folders
- Start Qt Creator and reconfigure your project
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Even if it was already done once:
- Exit Qt Creator
- Delete the
CMakeLists.txt.userfile from your sources - Nuke all build folders
- Start Qt Creator and reconfigure your project
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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 ?
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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 ?
wrote 27 days ago last edited by@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 ofimport QtGraphs 2.12change to
import QtGraphshelped (-:
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
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T Tobias83 has marked this topic as solved 15 days ago
15/25