QCheckBox in QTreeWidget

[Kode.Cooper]

Hi there,
I'm add a QCheckBoxin my QTreeWidget like these, but, How to set the widget to be center of the column rect?

treeWidget->setItemWidget(subItem, 2, chkItem);
subItem->setTextAlignment(2, Qt::AlignHCenter);
Qt::CheckState chkState = (bNeedSync.toInt() == 1) ? Qt::Checked : Qt::Unchecked;
chkItem->setCheckState(chkState);

treeWidget->setItemWidget(subItem, 2, chkItem);
subItem->setTextAlignment(2, Qt::AlignHCenter);
Qt::CheckState chkState = (bNeedSync.toInt() == 1) ? Qt::Checked : Qt::Unchecked;
chkItem->setCheckState(chkState);

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I digged the code and this forum and no without any tip information. Thanks.
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