[Interest] QT QFontMetrics boundingRect failed to textwordwrap, thanks!

[sq]

Hello, in QT4.8 I have the following code, want to calculate the size of the 
rectangle with the line break, the result of the rect did not wrap at all.
How can I get the size of rect that a  long QString needed text-wrapped 
automatically?Thanks very much!

 

 

    QPainter painter(this);
    QString text("1234567890123456789012345678901234567890"
                 "1234567890123456789012345678901234567890"
                 "1234567890123456789012345678901234567890"
                 "1234567890123456789012345678901234567890");
    int width = this->width()-40;
    int flags = Qt::TextWordWrap;
    
qDebug()<<"font:"<<painter.font().pointSize()<<",pixelSize="<<painter.font().pixelSize();

    QFontMetrics metrics = painter.fontMetrics();
    QRect textBoundingRect = 
metrics.boundingRect(QRect(0,0,width,0),flags,text);
    painter.translate(20,20);
    painter.drawRect(textBoundingRect);
    painter.drawText(textBoundingRect,Qt::TextWordWrap,text);
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