SBGWindow signals

[Yassine]

Hi all,

In my element I am creating SBGWindow from QWidgets and I would like to catch their closing signal. Does any one of you know how to do it ?

I already tried to connect to the QWidget closing signal:

SAMSONWindow = SAMSON::addWidget(windowsVector[imageNumber], "RDKit SmilesConverter", SBGWindow::Lockable);
QObject::connect(SAMSONWindow, SIGNAL(close()), this, SLOT(saveImage()));

But it didn't work because SBGWindow doesn't have close() signal. I think it will be very useful to add it.

Thanks for your help !
Yassine

[Stephane]

If windowsVector[imageNumber] derives from SBGWindowWidget, you have two possibilities:

The first one is to override the SBGWindowWidget::hideEvent(QHideEvent* event) function:

void MyWidget::hideEvent(SBGWindowWidget::hideEvent(QHideEvent* event)) {

    // do something

    // call the hideEvent function of the parent class

    SBGWindowWidget::hideEvent(QHideEvent* event)

}

The second one is to connect to the shown() signal of the SBGWindowWidget class (hence your derived class):

QObject::connect(windowsVector[imageNumber], SIGNAL(shown(bool)), this, SLOT(saveImage(bool)));

When the window is closed, shown(false) is emitted.

[Yassine]

Thank you Stephane, it works but with the second possibility that you mentioned, shown(false) is also emitted when lock button is pressed. First option is better in that sense.

[Stephane]

True. For some reason, locking needs the window to be hidden and shown again, so the signal is emitted.

[Stephane]

By the way, isn't hideEvent() called when the window is locked as well, for the same reason?

[Yassine]

Actually yes, I didn't test it before but hideEvent() is also called when the window is locked for the same reason as shown signal. Hmmm I thought it was possible to filter the event event->type() == QHideEvent::Hide but it seems that locking the window and hiding it (meaning closing it) has the same event type. Is it possible to distinguish these two actions ?

[Stephane]

Not at the moment, so I'm adding three signals to SBGWindow for 0.7.0:

• closed(): emitted when the window is closed by the user
• locked(bool): emitted when the window is locked or unlocked
• shown(bool): emitted when the window is shown or hidden

[Yassine]

Perfect. Oh and maybe a flag to set the locking status of SBGWindow when it is Lockable. Thank you Stéphane !

[Stephane]

Done ;-). setLockedFlag(bool) and getLockedFlag() inside SBGWindow.