#include <QtWidgets/QtWidgets>

const char *setupInfo1 = "Setup Information (1) - 2 screens (One 4K + One 2560x1440) \n"
                         "Scale is default (4K = 150% - the other is scaled at 100%) ";

const char *setupInfo2 = "Setup Information (2) - 2 screens (One 4K + One 2560x1440) \n"
                         "4K screen is scaled default (150%) - the other is also scaled to 150%.";

const char *setupInfo3 = "Setup Information (3) - 1 4K screen - Scaled default (150%)";

// example1
int main(int argc, char *argv[])
{
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
  // Enable high dpi for Qt5 - it is always enabled for Qt6
  QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
  QApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);
#endif

  QApplication a(argc, argv);

  qDebug() << "Qt Version: " << qVersion();
  qDebug() << setupInfo3;

  for (int u = 0; u < QGuiApplication::screens().size(); ++u) {
    auto s = QGuiApplication::screens().at(u);
    qDebug() << "Screen" << u << " geometry:" << s->geometry() << " dpr:" << s->devicePixelRatio();
  }
}