QtCreator errors with QtGraphs QML

Tobias83

Hallo everybody,

I changed from QtCharts to QtGraphs, because QtCharts is deprecated. But with QtCreator the QML stuff of QtGraphs is not recognized. The prompts GraphsView, LineSeries and VXYModelMapper are "unknown components", while the import QtGraphs prompt is working. On OpenSuse Tumbleweed, there are the following rpm packages in the repo:

libQt6Charts6 -> /usr/lib64/
libQt6ChartsQml6 -> /usr/lib64/
qt6-charts-devel -> /usr/include/qt6/QtCharts/
qt6-charts-imports -> /usr/lib64/qt6/qml/QtCharts/
qt6-chartsqml-devel -> /usr/include/qt6/QtChartsQml/
libQt6Graphs6 -> /usr/lib64/
qt6-graphs-devel -> /usr/include/qt6/QtGraphs/
qt6-graphs-imports -> /usr/lib64/qt6/qml/QtGraphs/

Is there maybe a package missing? QtCharts was working and QtGraphs does not.

In cmake file I have the following entries:

find_package(Qt6 6.7 REQUIRED COMPONENTS Qml Core Quick Graphs)
include_directories(${Qt6Core_INCLUDE_DIRS} ${Qt6Quick_INCLUDE_DIRS} ${Qt6Qml_INCLUDE_DIRS} ${Qt6Graphs_INCLUDE_DIRS})
target_link_libraries(simHardcoreQt6
PRIVATE Qt6::Core Qt6::Quick Qt6::Qml Qt6::Graphs
PRIVATE HardcoreQt6 )

Is there something with my cmake file wrong? I simply changed "Charts" into "Graphs".

Kind regards,
Tobias

SGaist

Hi,

Do you mean you have errors shown from the code model or is your code not working ?

Tobias83

@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 type

Tobias

SGaist

Can you share a minimal compilable example that shows this ?

Tobias83

@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

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

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

Tobias83

@JoeCFD I have

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 ...