qt - Why the QFontMetrics::boundingRect() return a wrong size rect? -


i'm using qt4.7. when use qfontmetrics render text in situation, got wrong width. code this:

qfontmetrics fm(qapplication::font()); qrect rc = fm.boundingrect(str);

i found fm.boundingrect(str) return fixed rect while dpi changed.


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