QTableWidget replace dotted selected row with border

[E106JZ]

For a QTableWidget, I'm trying to replace the default dotted border around a selected row so that it extends to the entire row and is a black border instead. I've searched the forums and google but I can't find any examples of what I want to achieve which is this:

I tried setting the outline property in the stylesheets but it didn't do anything.
Does anyone know how to do this?

Thanks

[mrjj]

Hi
The dotted is actually a focus rect not selection. Different concept.
Anyway,
you can use a delegate to do custom drawing to get that effect

class DrawBorderDelegate : public QStyledItemDelegate
{
    QTableView *table;
public:
    DrawBorderDelegate( QObject *parent, QTableView *theTable ) : QStyledItemDelegate( parent ),
        table(theTable)  {}
    void paint( QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index ) const
    {

        // kill the focus rect
        QStyleOptionViewItem option2 = option; // its const..
        option2.state = option.state & (~QStyle::State_HasFocus);

        QStyledItemDelegate::paint( painter, option2, index );

        // if selected row paint borders
        if (  table->currentIndex().row() == index.row() ) {
            const QRect rect( option.rect );
            painter->setPen(QPen(Qt::red, 2));
            painter->drawLine( rect.topLeft(), rect.topRight() );
            painter->drawLine( rect.bottomLeft(), rect.bottomRight() );

            // Draw left edge of left-most cell
            if ( index.column() == 0 )
                painter->drawLine( rect.topLeft(), rect.bottomLeft() );

            // Draw right edge of right-most cell
            if ( index.column() == index.model()->columnCount() - 1 )
                painter->drawLine( rect.topRight(), rect.bottomRight() );
        }


    }

}; // DrawBorderDelegate
.. in cpp
 ui->tableWidget->setItemDelegate( new DrawBorderDelegate( this,  ui->tableWidget ) );

Design note. this was fast made so i just gave the QTableWidget as a parameter to know the current row.
That couples it to that type of view which is not optimal.

[E106JZ]

@mrjj Wow thanks!

[E106JZ]

@mrjj said in QTableWidget replace dotted selected row with border:

ui->tableWidget->setItemDelegate( new DrawBorderDelegate( this, ui->tableWidget ) );

I've noticed that border looks thicker on the bottom than the top. Also it looks like the painter doesn't draw over the table grid lines. Why does this happen?