QTableView: How to select some self-defined items when clicked?

[pdeagle]

Hello, All:
I want to select half row when I clicked some item. I rewrite the selectionChanged() function. It can work at the first click. However, when clicked second time, the original selected items cannot be removed. Why? Thanks

void CMyWidgetTable::selectionChanged(const QItemSelection & selected, const QItemSelection & deselected){
 	QModelIndexList vd = selected.indexes();
 	if(vd.size() == 1){
 		QModelIndex current = vd.back();
 		QItemSelection dSel;
 		if(current.column() < 7){
 			dSel.select(m_pdModel->index(current.row(), 0), m_pdModel->index(current.row(), 6));
 		}
 		else if(current.column() >= 7){
 			dSel.select(m_pdModel->index(current.row(), 7), m_pdModel->index(current.row(), 13));
 		}
 
  		QItemSelectionModel *pdSelectionModel = selectionModel();
  		pdSelectionModel->select(dSel, QItemSelectionModel::SelectCurrent);
 	}
}

void CMyWidgetTable::selectionChanged(const QItemSelection & selected, const QItemSelection & deselected){
 	QModelIndexList vd = selected.indexes();
 	if(vd.size() == 1){
 		QModelIndex current = vd.back();
 		QItemSelection dSel;
 		if(current.column() < 7){
 			dSel.select(m_pdModel->index(current.row(), 0), m_pdModel->index(current.row(), 6));
 		}
 		else if(current.column() >= 7){
 			dSel.select(m_pdModel->index(current.row(), 7), m_pdModel->index(current.row(), 13));
 		}
  		
  		QItemSelectionModel *pdSelectionModel = selectionModel();
  		pdSelectionModel->select(dSel, QItemSelectionModel::SelectCurrent);
 	}
}

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