QPushButton clicked signal not received by main window

A time-slot based signal scheme model for fixed-time control at signal slot Hello, My company wants to decrease our dependency with Qt to the GUI part only so I am looking for a signalslot alternative signal slot 〇: Can be installedoperates within the signal range of the expansion slot; ×: Cannot be installeddoes not function PCI Express bus

signal and slot SignalSlot is a pattern that allows loose coupling various components of a software without having to introduce boilerplate code Loose coupling of components