signal and slot
Integrating C++ with QML | ICS
The signal/slot mechanism has the following features. ... When a signal is emitted then any arguments are converted to C++ types if possible.
New Signal Slot Syntax
Both examples achieve the same result of connecting the dataReady signal to the onDataReady slot, demonstrating two different approaches to signal-slot connections in Qt.
Qt Signals And Slots - Programming Examples
Cách hoạt động của Signal và Slot trong QTUsing signal and slot in QT.