[Felgo User]

I’m currently porting a C++ application to Felgo. One problem I’m facing is the communication between C++ and QML, because it just won’t work. I’ve read all of the official tutorials and other examples there is.

main.cpp

...
qmlRegisterType<tile>("io.qt.examples.tile", 1, 0, "Tile");

QQmlContext *context = engine.rootContext();
tile t;
context->setContextProperty(QStringLiteral("tile"), &t);
...

tile.h

 

public:

…

signals:

void tileChanged(QString number, QString name, QString color, QString status);

tile.cpp

...
emit tileChanged();
...

page.qml

 

import io.qt.examples.tile 1.0

Page {

…

Connections{

target: tile

onTileChanged: { console.log(“HELLO WORLD!”) }

}

Tile{

onTileChanged: { console.log(“HELLO WORLD!”) }

}

…

}

 

 

But nothing seems to be on the console. And yes, the function is emitted properly – I checked it with the debugger. Any help would be appreciated.

[GüntherFelgo Team]

Hi!

We made an example project with working C++ / QML Integration a while ago, I prepared you a download here:
https://www.dropbox.com/s/bfxhhife7gkeg0j/VPlayCppQML.zip?dl=0

You can use it to check your setup with the project code, to see you might be missing.

Best,
Günther

[Manuel]

Hello

I feel like a grave digger but currently this sample and the one provided with the SDK and any attempt to get this to work throws this error:

 

 

QQmlComponent: Component is not ready
file:/VPlayCppQML//qml/Main.qml:6: module "com.yourcompany.xyz" is not installed

 

 

Something seems broken. Tried it with a normal Qt5 project, it works without any problem.

[AlexFelgo Team]

Hi Manuel,

are you trying to use it with Felgo Live or normal deployment? To use custom C++ with Felgo Live, please follow this guide: https://felgo.com/updates/release-2-16-1-live-code-reloading-with-custom-c-and-native-code-for-qt

Cheers,
Alex

[Manuel]

Hello Alex

I tried both ways, it always logs:

 

QQmlComponent: Component is not ready

file:/lamada//qml/Main.qml:42: Type SamplePage unavailable
file:/lamada//qml/SamplePage.qml:4: module “samplecpp” is not installed

My test project is here: https://www.file-upload.net/download-13251613/lamada_usecasetesting.zip.html

Don’t know if something is horrible wrong with my system (win 10) but I having also troubles with simple REST-Requests which are working with normal Qt.

 

Greets

Manuel

 

 

[Manuel]

Hello again!

Seems to work now, I think there was a mistake in my qml. Deleted the file and wrote it from scratch new. Works now.

Sorry for the false alert.

Greets

Manuel