QDataStream and saving and loading QList

[Noxxik]

I found in google that this is not good.
So I try this

bool MainScene::loadFile(const QString &fileName)
{
   QFile file(fileName);
   if(!file.open(QIODevice::ReadOnly))
      return false;
 
   QDataStream inStream(&file);
   inStream.setVersion(QDataStream::Qt_4_4);
 
   quint32 magicWord, second;
   inStream >> magicWord >> second;
   if (magicWord != 0xA0B0C0D0) return false;
 
   QApplication::setOverrideCursor(QCursor(Qt::WaitCursor)); // set wait cursor during loading
 
   inStream >> list;
   QApplication::restoreOverrideCursor();
   file.close();
   return true;
}
 
bool MainScene::saveFile(const QString &fileName)
{
   QFile file(fileName);
   if (!file.open(QIODevice::WriteOnly))
      return false;
 
   QApplication::setOverrideCursor(QCursor(Qt::WaitCursor)); // set wait cursor during saving 
 
   QDataStream outStream(&file);
   outStream.setVersion(QDataStream::Qt_4_4);
 
   outStream << (quint32)0xA0B0C0D0;
   outStream << (qint32)123;
 
   outStream << list;
   QApplication::restoreOverrideCursor();
   file.close();
   return true;
}
 
 
QDataStream &operator<<(QDataStream &out, const Item *item)
{
    out << qint16(item->itemType()) << item->sceneBoundingRect() << item->pen() << item->brush() << item->pos() << item->zValue();
    return out;
}
 
QDataStream &operator>>(QDataStream &in, Item *item)
{
    qint16 type;
    QRectF rect;
    QPen pen;
    QBrush brush;
    QPointF point;
    int zValue;
 
    in >> type >> rect >> pen >> brush >> point >> zValue;
    item = new Item((Item::ItemType)type, rect);
    item->setPen(pen);
    item->setBrush(brush);
    item->setPos(point);
    item->setZValue(zValue);
    return in;
}

bool MainScene::loadFile(const QString &fileName)
{
   QFile file(fileName);
   if(!file.open(QIODevice::ReadOnly))
      return false;
   
   QDataStream inStream(&file);
   inStream.setVersion(QDataStream::Qt_4_4);
   
   quint32 magicWord, second;
   inStream >> magicWord >> second;
   if (magicWord != 0xA0B0C0D0) return false;
   
   QApplication::setOverrideCursor(QCursor(Qt::WaitCursor)); // set wait cursor during loading

   inStream >> list;
   QApplication::restoreOverrideCursor();
   file.close();
   return true;
}

bool MainScene::saveFile(const QString &fileName)
{
   QFile file(fileName);
   if (!file.open(QIODevice::WriteOnly))
      return false;
   
   QApplication::setOverrideCursor(QCursor(Qt::WaitCursor)); // set wait cursor during saving 
   
   QDataStream outStream(&file);
   outStream.setVersion(QDataStream::Qt_4_4);
   
   outStream << (quint32)0xA0B0C0D0;
   outStream << (qint32)123;
   
   outStream << list;
   QApplication::restoreOverrideCursor();
   file.close();
   return true;
}


QDataStream &operator<<(QDataStream &out, const Item *item)
{
    out << qint16(item->itemType()) << item->sceneBoundingRect() << item->pen() << item->brush() << item->pos() << item->zValue();
    return out;
}

QDataStream &operator>>(QDataStream &in, Item *item)
{
    qint16 type;
    QRectF rect;
    QPen pen;
    QBrush brush;
    QPointF point;
    int zValue;
    
    in >> type >> rect >> pen >> brush >> point >> zValue;
    item = new Item((Item::ItemType)type, rect);
    item->setPen(pen);
    item->setBrush(brush);
    item->setPos(point);
    item->setZValue(zValue);
    return in;
}

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But programm crash when I try to load my file
What is wrong? Or I cannot send to QDataStream all QRect or QPen or QBrush, etc?


edit: or I have to "convert" all QRect or QPen or QBrush, etc... to uint which is described in THIS? It could be hard, isnt it?