I subclassed QItemDelegate::setModelData() and I am now getting multiple calls into it when the QTableWidgetItem loses focus. The end result is a crash in a moc_** file when pressing 'Enter'.

Mouse-clicking, Tab and Enter all cause a double entry into the setModelData() function. Only the Enter key causes a crash.

I am baffled. Can anyone see something wrong with my implementation of setModelData()?

Qt Code: 
  1. int Table::qt_metacall(QMetaObject::Call _c, int _id, void **_a)
  2. {
  3. --->_id = QTableWidget::qt_metacall(_c, _id, _a);
  4.     . . .
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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.         // Validate the Name string
  9.         if ( (lineEdit != NULL) || !lineEdit->text().isEmpty() )
  10.         {
  11.             QString sTypedName = lineEdit->text();
  12.  
  13.             // Substitute for illegal characters
  14.             QString sNewName = "";
  15.             bool bIsValid = true;
  16.             QChar c;
  17.  
  18.             for ( int i = 0; i < sTypedName.length(); i++ )
  19.             {
  20.                 c = sTypedName.at( i );
  21.  
  22.                 if ( (c == '(') || (c == '<') )
  23.                 {
  24.                     c = '[';
  25.                     bIsValid = false;
  26.                 }
  27.                 else if ( (c == ')') || (c == '>') )
  28.                 {
  29.                     . . .
  30.                 }
  31.  
  32.                 sNewName.append( c );
  33.             }
  34.  
  35.             if ( !bIsValid )
  36.             {
  37.                 QString sOrigName = index.data( Qt::EditRole ).toString();
  38.  
  39.                 int rVal = QMessageBox::warning( qobject_cast<QWidget*>( m_parent ),
  40.                                                  "Restricted Characters Found"),
  41.                                                  "Message String"),
  42.                                                  QMessageBox::Ok, QMessageBox::Cancel );
  43.                 if ( rVal == QMessageBox::Cancel )
  44.                     model->setData( index, QVariant( sOrigName ) );
  45.                 else
  46.                     model->setData( index, QVariant( sNewName ) );
  47.             }
  48.         }
  49.  
  50.         return;
  51.     }
  52.  
  53.     QItemDelegate::setModelData( editor, model, index );
  54. }
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