How to center an item editor created by a custom item delegate?

[bar0n]

As the title says... i have a qitemdelgate which creates a QCheckBox as editor for some items. how can i center this editor in the cell of the qtableview where the editor shows up.

here`s the method i wrote so far

QWidget* QmitkDataStorageDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option
                                             , const QModelIndex &index) const
{
  if (index.column() == m_VisibilityColumnIndex)
  {
    //option.decorationAlignment = Qt::AlignCenter;
    //option.decorationAlignment = Qt::AlignCenter;
 
    QCheckBox* visibilityCheckBox = new QCheckBox(parent);
    connect(visibilityCheckBox, SIGNAL(editingFinished()),
      this, SLOT(commitAndCloseEditor()));
    return visibilityCheckBox;
  } 
  else 
  {
    return QItemDelegate::createEditor(parent, option, index);
  }
}

QWidget* QmitkDataStorageDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option
                                             , const QModelIndex &index) const
{
  if (index.column() == m_VisibilityColumnIndex)
  {
    //option.decorationAlignment = Qt::AlignCenter;
    //option.decorationAlignment = Qt::AlignCenter;

    QCheckBox* visibilityCheckBox = new QCheckBox(parent);
    connect(visibilityCheckBox, SIGNAL(editingFinished()),
      this, SLOT(commitAndCloseEditor()));
    return visibilityCheckBox;
  } 
  else 
  {
    return QItemDelegate::createEditor(parent, option, index);
  }
}

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