Wordwrap label on the Mac cause the label to have a large height

Setting wordwrap to a label on Mac causes it to get a big space on the top and on the bottom.
If the wordwrap is turned off it looks normal.

This does not happen on Windows.

Reproducible with the following example:

#include <QtGui>

class dialog : public QDialog
{
Q_OBJECT
public:
dialog(QWidget* parent = 0)
: QDialog(parent)

{ QGridLayout* gridLayout = new QGridLayout(this); gridLayout->setObjectName(QString::fromUtf8("gridLayout")); // gridLayout->setHorizontalSpacing(6); // gridLayout->setVerticalSpacing(6); // gridLayout->setContentsMargins(0, 0, 0, 0); QLabel *label_3 = new QLabel(); label_3->setObjectName(QString::fromUtf8("label_3")); QSizePolicy sizePolicy2(static_cast<QSizePolicy::Policy>(1), static_cast<QSizePolicy::Policy>(0)); // sizePolicy2.setHorizontalStretch(0); // sizePolicy2.setVerticalStretch(0); // sizePolicy2.setHeightForWidth(label_3->sizePolicy().hasHeightForWidth()); label_3->setSizePolicy(sizePolicy2); label_3->setFrameShape(QFrame::Box); label_3->setFrameShadow(QFrame::Sunken); label_3->setWordWrap(true); // label_3->setMargin(4); // label_3->setIndent(15); label_3->setText(QApplication::translate("textEditWidget", "You can use virtually any rich text markup to modify the text. However, not all special characters are available on all platforms.", 0, QApplication::UnicodeUTF8)); QPushButton* pb2 = new QPushButton("ok", this); connect(pb2, SIGNAL(clicked()), this, SLOT(accept())); gridLayout->addWidget(label_3, 0, 0, 1, 2); gridLayout->addWidget(pb2, 1, 1, 1, 1); }

private:
QLabel *sourceLabel;
};

class widget : public QMainWindow
{
Q_OBJECT
public:
widget(QWidget* parent = 0)
: QMainWindow(parent)

{ QPushButton* pb = new QPushButton("show dialog", this); connect(pb, SIGNAL(clicked()), this, SLOT(showdialog())); }

private slots:
void showdialog()

{ dialog dlg; dlg.exec(); }

};

#include "main.moc"

int main(int argc, char **argv)
{
QApplication a(argc, argv);
widget w;
w.show();
return a.exec();
}