How to detect if a window has been minimized/Alt-Tab'd ??

[lgos]

Hi,

The title says it all. I want to do something evverytime my window is minimized, or put to background, everytime I switch to other window.
I thought it had to do with losing focus so I tried :

bool Note::eventFilter(QObject *object, QEvent *event)
{
    if( event->type() == QEvent::FocusOut )
        {
            Note::writeToFile();
            return true;
        }
 
        return false;
}

bool Note::eventFilter(QObject *object, QEvent *event)
{
    if( event->type() == QEvent::FocusOut )
        {
            Note::writeToFile();
            return true;
        }

        return false;
}

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with

installEventFilter(this);

installEventFilter(this);

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on the cosntructor.

But it didn't work. It works with QEvent::KeyPress however.