Export watcher:

int main(int argc, char *argv[]) { QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling); QGuiApplication app(argc, argv); QQmlApplicationEngine engine; const QUrl url(QStringLiteral("qrc:/main.qml")); QObject::connect(&engine, &QQmlApplicationEngine::objectCreated, &app, [url](QObject *obj, const QUrl &objUrl) { if (!obj && url == objUrl) QCoreApplication::exit(-1); }, Qt::QueuedConnection); QFileSystemWatcher watcher; watcher.addPath("data.json"); readJSON myGlobal; engine.rootContext()->setContextProperty("myGlobalObject", &myGlobal); engine.rootContext()->setContextProperty("watcher", &watcher); engine.load(url); return app.exec(); }

and use Connections:

Window { visible: true width: 800 height: 800 title: qsTr("Screen Display") DisplaysForm { function callCPP(text) { var dataOne = myGlobalObject.readingJson(text) dataOne = parseFloat(dataOne) return dataOne } function updateDisplay() { var value = callCPP("Engine_Spd") engSpd_txt.text = value var value1 = callCPP("Engine_Power") engPwr_txt.text = value1 } Connections{ target: watcher function onFileChanged(path){ console.log(path) updateDisplay() } } }

Pricelesss.... Thanks!

I have corrected this bug and the other under linux too, my correction is not very clean,but it corrects the bugs.I must look under mac os too

No event loop in my test - that is the problem.

Thanks for that mate, much appreciated.

I'll post this on the mailing list :)

@Varius said:

thread = new QThread(this);
console->moveToThread(thread);

IIRC, these lines are doing more than you think they do. thread's parent is your object, then you move your MyObject instance to thread, so all objects who are child of your MyObject instance are moved the thread. So thread will be moved to itself.

All in all, you should rather have thread in your main as a stack object