wysota, thanks for helping me with this.

Since I inherited the QTableWidget, release deadlines require me to continue its use, although from everything I've read I really need a QTableView. Since I'm already using a delegate to handle other table cell validation it would seem to make sense to explore the setModelData() route.

Does something like this appear appropriate (provided I don't mess up the validation code)?

Qt Code: 
  1. void DMXTableCellDelegate::setModelData( QWidget* editor, QAbstractItemModel* model,
  2.                                          const QModelIndex& index ) const
  3. {
  4.     if ( index.column() == COL_Name )
  5.     {
  6.         QLineEdit* lineEdit = qobject_cast<QLineEdit*>( editor );
  7.  
  8.         if ( lineEdit != NULL && !lineEdit->text().isEmpty() )
  9.         {
  10.             QString sValidStr = lineEdit->text();
  11.  
  12.             // validate will return true if the string was modified
  13.             if ( validate( sValidStr ) == true )
  14.             {
  15.                 // update the model with the modified string
  16.                 model->setData( index, sValidStr );
  17.                 return;
  18.             }
  19.         }
  20.     }
  21.  
  22.     // validate did NOT modify the string
  23.     QItemDelegate::setModelData( editor, model, index );
  24. }
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