Qt Memory Management & Signal and Slots | PPT
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Qt Signals And Slots - Programming Examples
bool connect ( const QObject * sender, const char * signal, const char * method, Qt::ConnectionType type = Qt::AutoCompatConnection ) const.
Simplify signals and slots connections with unique connections ...
Qt automatically breaks a signal/slot connection if either the sender or the receiver are destroyed (or if context object is destroyed, when using the new connection syntax and connecting to free functions).