QPainter does not honor font's style name when it is created using QFont::fromString

When a QFont is created using QFont::fromString, and this font is set to a QPainter, the styleName is not set correctly. This is because in QFont::fromString function, the styleName is directly updated without setting the QFont::StyleNameResolved flag.

So when setting to QPainter, QFont::resolve function will overwrite the font's styleName

 
Example:

QFont font("Arial");
font.setStyleName("Italic");

QFont fontFromStr;
fontFromStr.fromString(font.toString());

QPainter painter(this);
painter.setFont(fontFromStr);

qDebug() << "<<<<< " << font.toString() << QFontInfo(font).styleName() << painter.fontInfo().styleName();

// Output:
// <<<<<  "Italic" "Italic" "Regular"

Notice the styleName printed by painter's qfontinfo is incorrect

I have attached a sample project which would give different styleName when QPainter:fontInfo().styleName() is called after setting the QFont created using QFont::fromString

QFontInfoFromPainter.zip