How to get sender widget with a signal/slot mechanism?

Question

It's possible to bind more than one signal to one slot (isn't?). So, is there a way to understand which widget sends the signal? I'm looking for something like sender argument of events in .NET

Answer 1

Use QObject::sender() in the slot, like in the following Example:

void MainWindow::someSetupFunction( void ) {    ...    connect( _foobarButton, SIGNAL(clicked()), this, SLOT(buttonPressedSlot()) ); }  void MainWindow::buttonPressedSlot() {    // e.g. check with member variable _foobarButton    QObject* obj = sender();    if( obj == _foobarButton )    {        ...    }     // e.g. casting to the class you know its connected with    QPushButton* button = qobject_cast<QPushButton*>(sender());    if( button != NULL )     {        ...    }  } 

Answer 2

QObject::sender() will do the job.