The post would benefit from some links to the documentation itself. For example: QScreen: https://qt-project.org/doc/qt-5.0/qtgui/qscreen.html https://qt-proje

The post would benefit from some links to the documentation itself. For example: QScreen: https://qt-project.org/doc/qt-5.0/qtgui/qscreen.html https://qt-project.org/doc/qt-5.0/qtgui/qscreen.html QGuiApplication: https://qt-project.org/doc/qt-5.0/qtgui/qguiapplication.html https://qt-project.org/doc/qt-5.0/qtgui/qguiapplication.html QWindow: https://qt-project.org/doc/qt-5.0/qtgui/qwindow.html https://qt-project.org/doc/qt-5.0/qtgui/qwindow.html