How to Expose a Qt C++ Class with Signals and Slots to QML

qt connect signal to slot with parameter   Dan qt signal slot example

From Qt onwards, Qt offers two different ways to write signal-slot connections in C++: The string-based connection syntax and the functor-based

From Qt onwards, Qt offers two different ways to write signal-slot connections in C++: The string-based connection syntax and the functor-based QObject::connect(const QObject * sender , PointerToMemberFunction signal , const QObject * receiver , PointerToMemberFunction slot , Qt::

difference between slot and port Hi, you need to add the parameters in the signal when you call connect, but you can omit them in the slot, so you don't need a dummy parameter  In addition to all features provided by Qt the ROOT version supports connecting slots to a class These slots