Signal and Handler Event System Qt QML 2

There are three ways to connect to signals from objects in your Qt Designer UI We've already

Does your code ever return to the Qt event loop? Thank you for the answer but I don´t understand you I put the breakpoint in the emit line, and

signal and slot qt Does your code ever return to the Qt event loop? Thank you for the answer but I don´t understand you I put the breakpoint in the emit line, and

signal and slot arguments are not compatible Qt 5 Design Patterns on Udemy courseqt-5-design-patterns