Question

I need to restrict a custom widget setFont() so that it only accepts fixed-width fonts.

However, I can’t find how to programmatically define whether a particular QFont is a fixed-width one. Is there such a possibility?

Answer 1

Perhaps bool QFontInfo::fixedPitch() is the function you are looking for:

void MyWidet::setFont ( const QFont& font )
{
    QFontInfo fontInfo(font);
    if(fontInfo.fixedPitch())
        QWidget::setFont(font);

    // Otherwise ignore..
}