QFontMetrics to Paint a String

QFont font("times", 24);
QFontMetrics fm(font);
int pixelsWide = fm.width("What's the width of this text?");
int pixelsHigh = fm.height();

The Above example is taken from http://qt-project.org/doc/qt-5.0/qtgui/qfontmetrics.html#details

This will help to paint the QString properly.