Signals and Slots in Depth C++ GUI Programming with Qt4

In each QMetaObject, the slots, signals and other invokable methods of that object are given an index, starting from 0 They are ordered so that

I have class A, which dynamically allocates an instance of class B when a method is called, and emits a signal which carries the instance of B

signal and slot qt Signals and slots are loosely coupled: A class which emits a signal neither knows nor cares which slots receive the signal Qt's signals and slots mechanism

signal slot qt 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