how to apply stylesheet defined in .qss file to qt application

[wysota]

QApplication app(...);
QFile qss("stylesheet.qss");
qss.open(QFile::ReadOnly);
app.setStyleSheet(qss.readAll());
qss.close();

QApplication app(...);
QFile qss("stylesheet.qss");
qss.open(QFile::ReadOnly);
app.setStyleSheet(qss.readAll());
qss.close();

To copy to clipboard, switch view to plain text mode