void screenAdded(QScreen* screen)
{
screen->setOrientationUpdateMask((Qt::ScreenOrientations)0x0F);
qDebug("\nscreenAdded %s siblings %d first %s", qPrintable(screen->name()), screen->virtualSiblings().count(),
(screen->virtualSiblings().isEmpty() ? "none" : qPrintable(screen->virtualSiblings().first()->name())));
PropertyWatcher *w = new PropertyWatcher(screen, QString::number(i++));
QLineEdit *siblingsField = new QLineEdit();
siblingsField->setObjectName("siblings");
siblingsField->setReadOnly(true);
w->layout()->insertRow(0, "virtualSiblings", siblingsField);
updateSiblings(w);
// This doesn't work. If the multiple screens are part of
// a virtual desktop (i.e. they are virtual siblings), then
// setScreen has no effect, and we need the code below to
// change the window geometry. If on the other hand the
// screens are really separate, so that windows are not
// portable between them, XCreateWindow needs to have not just
// a different root Window but also a different Display, in order to
// put the window on the other screen. That would require a
// different QXcbConnection. So this setScreen call doesn't seem useful.
//w->windowHandle()->setScreen(screen);
// But this works as long as the screens are all virtual siblings
w->show();
QRect geom = w->geometry();
geom.moveCenter(screen->geometry().center());
w->move(geom.topLeft());
// workaround for the fact that virtualSiblings is not a property,
// thus there is no change notification:
// allow the user to update the field manually
QObject::connect(w, &PropertyWatcher::updatedAllFields, &updateSiblings);
}
void screenAdded(QScreen* screen)
{
screen->setOrientationUpdateMask((Qt::ScreenOrientations)0x0F);
qDebug("\nscreenAdded %s siblings %d first %s", qPrintable(screen->name()), screen->virtualSiblings().count(),
(screen->virtualSiblings().isEmpty() ? "none" : qPrintable(screen->virtualSiblings().first()->name())));
PropertyWatcher *w = new PropertyWatcher(screen, QString::number(i++));
QLineEdit *siblingsField = new QLineEdit();
siblingsField->setObjectName("siblings");
siblingsField->setReadOnly(true);
w->layout()->insertRow(0, "virtualSiblings", siblingsField);
updateSiblings(w);
// Set the screen via QDesktopWidget. This corresponds to setScreen() for the underlying
// QWindow. This is essential when having separate X screens since the the positioning below is
// not sufficient to get the windows show up on the desired screen.
QList<QScreen *> screens = QGuiApplication::screens();
int screenNumber = screens.indexOf(screen);
Q_ASSERT(screenNumber >= 0);
w->setParent(qApp->desktop()->screen(screenNumber));
w->show();
// Position the windows so that they end up at the center of the corresponding screen.
QRect geom = w->geometry();
geom.setSize(w->sizeHint());
if (geom.height() > screen->geometry().height())
geom.setHeight(screen->geometry().height() * 9 / 10);
geom.moveCenter(screen->geometry().center());
w->setGeometry(geom);
props->insert(screen, w);
// workaround for the fact that virtualSiblings is not a property,
// thus there is no change notification:
// allow the user to update the field manually
QObject::connect(w, &PropertyWatcher::updatedAllFields, &updateSiblings);
}