A QSignalMapper object bundles signals from identifiable senders. ... Inherits QObject . ... QSignalMapper  ( QObject * parent, const char * name=0 )  . ... void  setMapping  ( const QObject * sender, int identifier )  . void  setMapping  ( const QObject * sender, const char * identifier )  . void  removeMappings  ( const QObject * sender )  . void  map  ()  . ... Adds a mapping such that when map () is signalled from the given sender, the signal mapper(identifier) is emitted. ...