How do I assign a border to a specific QTableWidgetItem or a row in a QTableWidget?

Question

I am trying to make certain cells in my QTableWidget have different colored borders based on the information contained in an item(cell).

I do not want to select th

Answer 1

To change the border itself you'll probably need to create a custom delegate that does something along these lines:

class MyDelegate : public QItemDelegate {
  public:
    MyDelegate( QObject *parent ) : QItemDelegate( parent ) { }
    void paint( QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index ) const {
      QItemDelegate::paint( painter, option, index );
      if( /* some condition */ ) {
         painter->setPen( Qt::red );
         painter->drawRect( option.rect );
      }
    }
}

Then you can call:

myTableWidget->setItemDelegate( new MyDelegate(this) );

You can use QTableWidgetItem::setData() and the QModelIndex::data() functions to pass the necessary information back and forth between your table and the delegate

See the qt documentation for QItemDelegate

Answer 2

AFAIK, you can highlight the cell with a different color. I don't see any option that changes only the border of the cell.