(C++) Qt signal

 

Qt signals are signals used by the Qt library and the IDE Qt Creator.

 

Always seperate classes with Qt signals/slots in a header (.h) file and an implementation (.cpp) file. If not, this will result in the link error undefined reference to 'vtable for MyClass'.

 

 

 

 

 

Examples

 

• Qt signal example 1: emitter and receiver, the Qt4 way
• Qt signal example 2: emitter and receiver, the Qt5 way

 

 

 

 

 

Signal pages

 

• Boost signal
• std::signal
• Qt signal