QFontMetrics, i can't understand

[pakulo]

Qt 4.3

I use only this code

QFont font2;
std::cout<<QFontMetrics(font2).width("...")<<"\n";
font2.setBold(true);
font2.setItalic(true);
std::cout<<QFontMetrics(font2).width("...");

QFont font2;
std::cout<<QFontMetrics(font2).width("...")<<"\n";
font2.setBold(true);
font2.setItalic(true);
std::cout<<QFontMetrics(font2).width("...");

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And it is write

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