QQuickWidget "closed" signal

Question

What signal does it tell me when the QQuickWidget closes?

For example I wrote the following code :

QQuickWidget *view = new QQuickWidget;
view->setSource(QUrl::fromLocalFile("main.qml"));
view->show();

I have an ApplicationWindow in the main.qml file and I want to execute some code right after the qml window gets closed.

What do you mean by *after the Application Window item in one Qml file has finished up its execution*? — eyllanesc, May 18 '20 at 17:50
Then you should say: What signal does it tell me when the QQuickWidget closes? in addition to providing a [mre] — eyllanesc, May 18 '20 at 17:52

score 0 · Answer 1 · answered May 18 '20 at 18:10

The solution is to implement a Helper that is injected into QML and notifies us when the window is closed:

class Helper: public QObject{
    Q_OBJECT
public:
    using QObject::QObject;
Q_SIGNALS:
    void closed();
};

Helper *helper = new Helper;
QObject::connect(helper, &Helper::closed, [](){
   qDebug() << "closed";
});

QQuickWidget *view = new QQuickWidget;
view->rootContext()->setContextProperty("helper", helper);
view->setSource(QUrl::fromLocalFile("main.qml"));
view->show();

ApplicationWindow {
    // ...
    onClosing: helper.closed()
}

Why do I get the error "C++ requires a type specifier for all declarations" for the "QObject::connect()" line ? I've included and also added Q_OBJECT macro as in your answer. — Parsa Mousavi, May 18 '20 at 20:23

QQuickWidget "closed" signal

1 Answers1