#include <QApplication>
#include <QWidget>
#include <QString>
#include <QDesktopWidget>
#include <QTextEdit>
#include <QVBoxLayout>

int main(int argc, char *argv[])
{
	QApplication a(argc, argv);
	QWidget w;

	QString s;

	qreal dprF = w.devicePixelRatioF();
	int dpr = w.devicePixelRatio();

	s.append(QString::fromUtf8("w devicePixelRatioF: %1\tdevicePixelRatio: %2\n").arg(dprF).arg(dpr));

	QDesktopWidget* dw = QApplication::desktop();
	dprF = dw->devicePixelRatioF();
	dpr = dw->devicePixelRatio();

	s.append(QString::fromUtf8("desktop widget devicePixelRatioF: %1\tdevicePixelRatio: %2\n").arg(dprF).arg(dpr));

	QTextEdit te(&w);
	te.setPlainText(s);
	QVBoxLayout l;
	l.addWidget(&te);
	w.setLayout(&l);
	w.show();
	return a.exec();
}