Qt Embedded: displaying on two screens using QGraphicsView and QGraphicsWidget

Question

I am using Embedded QT 4.8. Widgets are based on QGraphicsView and QGraphicsWidget. Need to control two displays.

So far I was able to find suggestions how to control two displays using QDesktopWidget, which is QWidget. I assume there must be a way to control two screens, using two frame buffers, via QGraphicsWidget.

Can somebody please give me a reference with examples how to paint on two screens using QGraphicsView and QGraphicsWidget, and two frame buffers?

Thanks, Dusan Mudric.

Answer 1

Try this. I dont have 2 screens so I cant test

int main(int argc, char *argv[])
{
  QGuiApplication app(argc, argv);
  QQuickView view1(QUrl(QStringLiteral("qrc:/Screen1.qml")));
  qDebug() << app.screens().length();

  QScreen* screen1 = app.screens().at(0);
  QScreen* screen2 = app.screens().at(1);

  view1.setGeometry(0,0,200,200);
  view1.setScreen(screen1);
  view1.show();

  QQuickView view2(QUrl(QStringLiteral("qrc:/Screen2.qml")));
  view2.setGeometry(0,0,200,200);
  view2.setScreen(screen2);
  view2.show();

  return app.exec();
}

See unrelated but similar question Multiple Screens with Qt