Close Qml-Part and let the QWidget-App running

peter-70

I have a QWidget App with a Qml Camera-Part. When I click on a Button in the QWidget-App, the Qml-Part will be loaded:

Header:
private:
    QQmlApplicationEngine engine;

Implementation:
QApplication a(argc, argv);

MainWindow w;
w.show();
return a.exec();

// MainWindow creates Recorder-instance and these calls the Load-method:

void Recorder::Load() {
    this->engine.load(QUrl(QStringLiteral("qrc:/qml/recorder.qml")));

When I am done with the recording of my media-files, I'm going to close the Qml-Part, but the QWidget- App should still running at all!

I call this->engine.quit() in my C++ file, or Qt.quit() in my Qml-File, but either way the QWidget-App is closed also.

How can I prevent this behavior?
Ony the Qml Part should close, but not the QWidget App also.

Thanks for help!

peter-70

I think it's a pity that I have found little help in this forum so far. Neither to my own questions, nor by reading foreign contributions.

Anyway ... I have a solution, but I do not know if it's not a bit dirty. When the signal is fired that a media stream is ready, I delete the recorder instance:

void MainWindow::OnClosingPhotoRecorder(std::shared_ptr<QImage> photoImage)
{
    some code goes here...
    this->recorder->deleteLater();
}

This deletion causes the Qml-object will close, but the QWidget app will continue to run.

jsulm

@peter-70 said in Close Qml-Part and let the QWidget-App running:

I think it's a pity that I have found little help in this forum so far.

You asked 14h ago, please be more patient. People here help voluntary.
Deleting the recorder should be fine.

J.Hilk

@peter-70

for(QObject *obj : engine.rootObjects()){
        engine.rootObjects().removeOne(obj);
        obj->deleteLater();
    }
    engine.clearComponentCache();