I just got it done, hope this will work in general case
Qt Code: 
  1. void TestDelegate::paint(QPainter *painter,
  2. 						  const QStyleOptionViewItem &option,
  3. 						  const QModelIndex &index) const
  4. {
  5. 	if (index.column() == 1) 
  6. 	{
  7. 		bool data = index.model()->data(index, Qt::DisplayRole).toBool();
  8. 		QStyleOptionButton checkboxstyle;
  9. 		QRect checkbox_rect = QApplication::style()->subElementRect(QStyle::SE_CheckBoxIndicator, &checkboxstyle);
  10. 		checkboxstyle.rect = option.rect;
  11. 		checkboxstyle.rect.setLeft(option.rect.x() + 
  12. 			option.rect.width()/2 - checkbox_rect.width()/2);
  13. 		if(data)
  14. 			checkboxstyle.state = QStyle::State_On|QStyle::State_Enabled;
  15. 		else
  16. 			checkboxstyle.state = QStyle::State_Off|QStyle::State_Enabled;
  17.  
  18. 		QApplication::style()->drawControl(QStyle::CE_CheckBox, &checkboxstyle, painter);
  19. 	} 
  20. 	else
  21. 	{
  22. 		QStyledItemDelegate::paint(painter, option, index);
  23. 	}
  24. }
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