SignalSlot Communication

Debugging Qt's signal-slot connections What do you do if you think that you've correctly connected a signal to a slot and yet your slot's not being fired?

Hi all, I have a TCanvas in a QT application which I update by a QT timer event When the user closes the TCanvas window, I get a segfault

signal and slot arguments are not compatible 使用Qt的信号和槽（Signals and Slots）机制有以下好处：松耦合：通过信号和槽，对象之间的通信是松耦合的。发送者不需要知道接收者的具体实现细节，

signal slot Also in QML there is still the ability to connect a signal to a signal, as in QtC++ Look at the following artificial example In this case,