QT file application .qss

1. Define use .qss file types:

class UseQssFile
{
public:
	static void setStyle(const QString &style) 
	{
		QFile qss(style);
		qss.open(QFile::ReadOnly);
		qApp->setStyleSheet(qss.readAll());
		qss.close();
	}
};

2. Application .qss style in your code:

UseQssFile::setStyle("style.qss");