QObject::connect: Cannot queue arguments of type

micha_eleric

@Abderrahmene_Rayene said in QObject::connect: Cannot queue arguments of type:

@micha_eleric said in QObject::connect: Cannot queue arguments of type:

how to find out

Which version of Qt am I using? How do I find out?

instructions do not work for my version of QT Create, and once i did find preference->kit->kit, nothing was listed under auto-detected nor manual

JKSH

@micha_eleric said in QObject::connect: Cannot queue arguments of type:

once i did find preference->kit->kit, nothing was listed under auto-detected nor manual

That sounds very strange.

What do you see when you try Step #2 in the instructions?

micha_eleric

@JKSH said in QObject::connect: Cannot queue arguments of type:

@micha_eleric said in QObject::connect: Cannot queue arguments of type:

once i did find preference->kit->kit, nothing was listed under auto-detected nor manual

That sounds very strange.

What do you see when you try Step #2 in the instructions?

lol, second step also gave no version, but can find editor version elsewhere
Qt Creator 6.0.2
Based on Qt 5.15.3 (GCC 11.2.0, 64 bit)

Pl45m4

@micha_eleric said in QObject::connect: Cannot queue arguments of type:

Qt Creator 6.0.2
Based on Qt 5.15.3 (GCC 11.2.0, 64 bit)

This is meaningless. It's the Qt version which was used to build your QtCreator version.

How are your build folders named? In some case they are named by default like:
build_<Projectname>_<QtX_X_X>_<Compiler>_<Architecture>

There you also can find out what Qt version you are using

micha_eleric

@Pl45m4 said in QObject::connect: Cannot queue arguments of type:

@micha_eleric said in QObject::connect: Cannot queue arguments of type:

Qt Creator 6.0.2
Based on Qt 5.15.3 (GCC 11.2.0, 64 bit)

This is meaningless. It's the Qt version which was used to build your QtCreator version.

How are your build folders named? In some case they are named by default like:
build_<Projectname>_<QtX_X_X>_<Compiler>_<Architecture>

There you also can find out what Qt version you are using

again nothing of use, "build-GraphicsView-Desktop-Debug"

micha_eleric

@micha_eleric well, after pecking around, i found:
Qt 4.8.7 in PATH (qt4) /usr/lib/x86_64-linux-gnu/qt4/bin/qmake
Qt 5.15.3 in PATH (qt5) /usr/lib/qt5/bin/qmake
Qt 5.15.3 in PATH (System) /usr/bin/qmake

micha_eleric

i found another post that said to add

Q_DECLARE_METATYPE(QList<qfloat16>)

but still gave same error while running.

ChrisW67

@micha_eleric If you are on Ubuntu 22.04 (a guess on my part), have not installed a Qt version separately from that installed by Ubuntu, and everything is up-to-date then you are using Qt 5.15.3.

Open a terminal and type qmake -v

micha_eleric

@ChrisW67 said in QObject::connect: Cannot queue arguments of type:

@micha_eleric If you are on Ubuntu 22.04 (a guess on my part), have not installed a Qt version separately from that installed by Ubuntu, and everything is up-to-date then you are using Qt 5.15.3.

Open a terminal and type qmake -v

QMake version 3.1
Using Qt version 5.15.3 in /usr/lib/x86_64-linux-gnu

micha_eleric

in .h file, but only in one .h file

Q_DECLARE_METATYPE(QList<qfloat16>)


//data
int id;

in .cpp file, constructor

id = qRegisterMetaType< QList<qfloat16> >();

JKSH

This post is deleted!

HaoTian

@micha_eleric Impossible! My demo runs fine and I'm using Qt version 5.6