I have a problem: I'm trying to catch a keystroke. I use eventFilter:

bool Inf_int_qt::eventFilter(QObject *obj, QEvent *event)
{
//  ::SoundKeys(event);
    this->SoundKeys(event);
    return true;
}

Next I do the following checks:

void Inf_int_qt::SoundKeys(QEvent* event)
{
    
if(event->type() == QEvent::KeyPress || event->type() == QEvent::KeyRelease) 
{
    bool p_press =  event->type() == QEvent::KeyPress;

    QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
    if( keyEvent->isAutoRepeat() ) 
        return;

    switch (keyEvent->key())
    {

    case Qt::Key_Control:
        //do something
        break;
    }
}
}

In the end, when I quickly press (and release) the ctrl button, I get as many as 4 QEvent triggers:

1. QEvent::KeyPress
2. QEvent::KeyPress
3. QEvent::KeyRelease
4. QEvent::KeyRelease

It turns out that each signal is generated twice. I can't understand anything. Why can it work like this? OC Win 10. Qt 5.8.0