QML/QtQuick和QWidget之间的双向连接。

I am trying to make an app that would use QSerialPort and QtQuick so I need to connect desktop-like app to QML somehow. I managed to (ok i copied and made some changes) send information from QML to main.cpp but I can't send anything the other way. The wanted effect is to manage everything from .cpp, add and delete ListElements and send parameters to draw a graph.I am trying to make an app that would use QSeri