How to Expose a Qt C++ Class with Signals and Slots to QML
This guide shows how to integrate C++ with QML in Qt and Felgo, to use your C++ code from QML. Learn how to register your type or use context properties.
Cách đưa lớp Qt C++ có tín hiệu và khe cắm vào QML
This small example shows you how to bind QML and C++ together using signals and slots, in QT 5.12. ... In the QML file I want to use this class and its methods, including the QT Signal/Slot.
c++ - Connect QML signal to C++11 lambda slot (Qt 5) - Stack Overflow
Warning: While it is possible to use C++ to access and manipulate QML objects deep into the object tree, we recommend that you do not take this approach outside of application testing and prototyping.