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QML language has a global object called Qt which provides many useful enums and functions. Probably the most common used function of this object is quit(). This function causes to emit QQmlEngine::quit() signal, usually connected to QCoreApplication::quit() slot by the application developer.
But the problem is, this function calls QCoreApplication::exit() with return code 0.
My question is, is there a native way to tell the application to exit with a specified return code from QML? With "native", I mean a direct way instead of a work around or a hack(for ex., calling an invokable function).
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This function causes the QQmlEngine::quit() signal to be emitted. Within the Prototyping with qmlscene, this causes the launcher application to exit; to quit a C++ application when this method is called, connect the QQmlEngine::quit() signal to the QCoreApplication::quit() slot.
exit(1) should do the job. Calling exit is basically pulling the power plug and killing the application. That is certainly a way, but not always desirable. You may declare a signal in your main window and connect the signal to quit before you call exec().
To complete the discussion in the comments for others who came here: This functionality has been added to Qt by the OP in this change to Qt. Having a look at the documentation of Qt 5.7 and Qt 5.8, one can see that this change was not in 5.7 but has made it into the 5.8 release here.
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