Connect Qt signals and slots between C++ and QML. I think it would be best if you check this tutorial. This means the QML engine can use the Qt Meta Object System to . This signal is connected to a C++ object's slot using QObject::connect(), so that the Loading QML Objects from · Accessing Loaded QML · Properties. That's why you have to specify the parameter in QML with String, int etc. A method can be connected to a signal so that it is automatically invoked whenever the slot machine gratis robin hood is emitted. The syntax for defining a new signal is: The signal is being emitted, but because no slots are listening to it nothing happens. I do not use a QDeclarativeView subclass. Such properties are defined like this:. Signal objects have a connect method that can be used to a connect a signal to a method or another signal.