QTreeView and Column/Row Gridlines

I have seen this question asked before, but I did not quite see an answer that cleared it up for me. A QTreeView has rows and columns. Is there a way to draw gridlines so that each row and column is clearly outlined or just vertical lines to separate columns? I looked at Qt Designer and their Property Editor does this. Does creating a feature like this require reimplementing the drawRow function or is there a straight forward way to do this?

Thanks in advance

You could use a delegate

Code:

---

class GridDelegate : public QStyledItemDelegate
{
public:
    explicit GridDelegate(QObject * parent = 0) : QStyledItemDelegate(parent) { }
 
    void paint(QPainter * painter, const QStyleOptionViewItem & option, const QModelIndex & index ) const
    {
        painter->save();
        painter->setPen(QColor(Qt::black));
        painter->drawRect(option.rect);
        painter->restore();
 
        QStyledItemDelegate::paint(painter, option, index);
    }
};
 
int main(int argc, char ** argv)
{
    QApplication app(argc, argv);
 
    QStandardItemModel model;
    model.setRowCount(5);
    model.setColumnCount(5);
 
    for(int r = 0; r < model.rowCount(); r++)
        for(int c = 0; c < model.columnCount(); c++)
            model.setItem(r, c, new QStandardItem("Item"));
 
    QTreeView treeView;
    treeView.setModel(&model);
    treeView.setItemDelegate(new GridDelegate(&treeView));
    treeView.show();
 
    return app.exec();
}

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