QFontMetrics::leading() returns negative value.

[JantarManter]

Hi,

I though I understood what linespacing, leading and height meant, but I guess I still need to learn more. Following code returns leading() as a negative number.

QPainter p;
p.begin(&pr);
 
qDebug() << p.fontMetrics().lineSpacing() << p.fontMetrics().height() << p.fontMetrics().leading();
 
Output:
14 15 -1

QPainter p;
p.begin(&pr);

qDebug() << p.fontMetrics().lineSpacing() << p.fontMetrics().height() << p.fontMetrics().leading();

Output:
14 15 -1

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Obviously then, when my program prints on Cups-PDF printer using QPainter, the output doesn't look right. I tried this with at least two different fonts (DejaVu Sans and Trebuchet MS).

Rest of my application looks normal, so I conclude my code isn't quite correct. Any ideas what could I be missing?

Thanks