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42 #include "propertywatcher.h"
43 #include <QApplication>
47 #include <QFormLayout>
52 void updateSiblings(PropertyWatcher* w)
54 QLineEdit *siblingsField = w->findChild<QLineEdit *>("siblings");
55 QScreen* screen = (QScreen*)w->subject();
56 QStringList siblingsList;
57 foreach (QScreen *sibling, screen->virtualSiblings())
58 siblingsList << sibling->name();
59 siblingsField->setText(siblingsList.join(", "));
62 void screenAdded(QScreen* screen)
64 screen->setOrientationUpdateMask((Qt::ScreenOrientations)0x0F);
65 qDebug("\nscreenAdded %s siblings %d first %s", qPrintable(screen->name()),
66 screen->virtualSiblings().count(), qPrintable(screen->virtualSiblings().first()->name()));
67 PropertyWatcher *w = new PropertyWatcher(screen, QString::number(i++));
68 QLineEdit *siblingsField = new QLineEdit();
69 siblingsField->setObjectName("siblings");
70 siblingsField->setReadOnly(true);
71 w->layout()->insertRow(0, "virtualSiblings", siblingsField);
74 // This doesn't work. If the multiple screens are part of
75 // a virtual desktop (i.e. they are virtual siblings), then
76 // setScreen has no effect, and we need the code below to
77 // change the window geometry. If on the other hand the
78 // screens are really separate, so that windows are not
79 // portable between them, XCreateWindow needs to have not just
80 // a different root Window but also a different Display, in order to
81 // put the window on the other screen. That would require a
82 // different QXcbConnection. So this setScreen call doesn't seem useful.
83 //w->windowHandle()->setScreen(screen);
85 // But this works as long as the screens are all virtual siblings
87 QRect geom = w->geometry();
88 geom.moveCenter(screen->geometry().center());
89 w->move(geom.topLeft());
91 // workaround for the fact that virtualSiblings is not a property,
92 // thus there is no change notification:
93 // allow the user to update the field manually
94 QObject::connect(w, &PropertyWatcher::updatedAllFields, &updateSiblings);
97 int main(int argc, char *argv[])
99 QApplication a(argc, argv);
100 QList<QScreen *> screens = QGuiApplication::screens();
101 foreach (QScreen *screen, screens)
103 QObject::connect((const QGuiApplication*)QGuiApplication::instance(), &QGuiApplication::screenAdded, &screenAdded);