Qt Error: Signal QDeclarativeEngine::quit() emitted, but no receivers connected to handle it

Question

I am very new to Qt so that some Qt issues I can't figure out. I will really appreciate if somebody can help me. I am trying to get rid of application window's frame and create an exit button in qml in order to exit the application. Hence, I make a program as following: main.cpp ``` #include #include #include #include "qmlapplicationviewer.h" #include "myclass.h" #include "mainwindow.h" Q_DECL_EXPORT int main(int argc, char *argv[]) { QApplication app(argc, argv); MyClass myClass; MainWindow window; window.rootContext()->setContextProperty("myObject", &myClass); window.show(); return app.exec(); } ``` mainwindow.cpp ``` #include "mainwindow.h" MainWindow::MainWindow(QWidget *parent) : QDeclarativeView(parent) { // No window decorations setWindowFlags(Qt::FramelessWindowHint); // Set QML file setSource(QUrl::fromLocalFile("qml/Test2/main.qml")); } // Destructor. MainWindow::~MainWindow() { } ``` myclass.cpp ``` #include

Accepted Answer

The syntax is:

```
connect(sender, SIGNAL(signalName(args)), receiver, SLOT(slotName(args)));
```

You can put it in your MyClass constructor:

```
connect(this, SIGNAL(quit()), qApp, SLOT(quit()));
```

Or in the main function, since `connect()` is a static function, as Slavic81 pointed out in the comment below.

Note that qApp is a macro for the global application.

Qt Error: Signal QDeclarativeEngine::quit() emitted, but no receivers connected to handle it

Solution

Problem