QWidget *QgsAttributesTreeDelegate::createEditor( QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index ) const
{
  Q_UNUSED( option );
  if ( index.column() == QgsVectorLayerProperties::attrAliasCol )
  {
    QLineEdit *le = new QLineEdit( parent );
    le->setText( index.data( Qt::DisplayRole ).toString() );
    return le;
  }
  return 0;
};

void QgsAttributesTreeDelegate::setModelData( QWidget *editor, QAbstractItemModel *model, const QModelIndex &index ) const
{
  QgsDebugMsg("***ITEMreleased***");
  QLineEdit *le = qobject_cast<QLineEdit *>( editor );
  if ( le )
  {
    QString data = le->text();
    emit itemChanged( index , data );
    return;
  }
}


QgsVectorLayerProperties::QgsVectorLayerProperties(
  QgsVectorLayer *lyr,
  QWidget * parent,
  Qt::WFlags fl
)
    : QDialog( parent, fl )
    , layer( lyr )
    , mMetadataFilled( false )
    , mRendererDialog( 0 )
{.....
} // QgsVectorLayerProperties ctor

void QgsVectorLayerProperties::loadRows()
{
  const QgsFieldMap &fields = layer->pendingFields();

  QgsAttributesTreeDelegate* attributesTreeDelegate = new QgsAttributesTreeDelegate( this );
  connect( attributesTreeDelegate , SIGNAL( itemChanged( const QModelIndex &index , QString data ) ) , this, SLOT( on_mAttributesTree_itemChanged( const QModelIndex &index , QString data ) ) );

  mAttributesTree->setModel( &mTreeModel );
  mAttributesTree->setSortingEnabled( true );
  mAttributesTree->setEditTriggers( QAbstractItemView::CurrentChanged );
  mAttributesTree->setItemDelegate( attributesTreeDelegate );

  for ( QgsFieldMap::const_iterator it = fields.begin(); it != fields.end(); it++ )
    addAttributeRow( it.key(), it.value() );
}

void QgsVectorLayerProperties::on_mAttributesTree_itemChanged( const QModelIndex &index , QString data )
{
  QgsDebugMsg("ITEMCHANGED");
  if ( index.column() == attrAliasCol && layer )
  {
    int idx = index.sibling( index.row(), attrIdCol ).data().toInt();
    const QgsFieldMap &fields = layer->pendingFields();
    if ( !fields.contains( idx ) )
      return; // index must be wrong
    layer->addAttributeAlias( idx, data );
    mTreeModel.setData( index , data , Qt::DisplayRole );
  }
}