Problem with signalslot carrying pointer - qt

I have a question about how signalslot are supported by this framework I'm relatively new to Qt signalslot so I might

Qt Centre is a community site devoted to programming in C++ using the Qt framework Over 90 percent of questions asked here gets answered If you are looking

qt slot 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

qt connect signal slot This article explores how Qt implements and manages signals and slots across different operating systems and compares this with the message-