is there an event/signal which happens when the QMdiarea become empty?

[Prmego]

I want to implement a code when QMdiarea is empty i.e. (has no QSubWindow children).

For example:

is there an event or signal which happens when the QMdiarea become empty?

[Wieland]

Hi! If you're using tabs as your subwindows, then listening to the subWindowActivated signal might be enough. But I'm not 100% sure.

[Vinod Kuntoji]

connect(mdiArea,SIGNAL(subWindowActivated(QMdiSubWindow*)),this,SLOT(getSubwindowCount()));

static int count = mdiArea->subWindowList().size();
if(!subWindow->isVisible()) {
--count;
}
if(!subWindow1->isVisible()) {
--count;
}
qDebug() << Q_FUNC_INFO <<count;

if count is Zero, mdiArea will be empty.

[Prmego]

Yes, it's work fine. so the subWindowActivated is the right signal for that job.
I thank @Wieland and @Vinod-Kuntoji for helping me.