Copy and paste QGraphicItem on my QGraphicScene

vinzzz

hi i am a new to Qt, i couldn’t find how u will serialize selected items, if you copy an selected item like which i done below i just get a shallow copy of an item, how do we actually get this selected item and serialize it. plz show it with a small example

QList<QGraphicsItem *> copiedItem = this->selectedItems();

All i want to finally do is, i wanted to copy and paste QGraphicItem on my QGraphicScene .
thanks in advance

vinzzz

Hi i am new to Qt, and i am working on cut, copy, paste plz give directions how to solve this

This is how i copy an item and serialize it

[code]QFile file("fileName.dat");
file.open(QIODevice::WriteOnly);
QDataStream out(&file);

QList<QGraphicsItem > list1= this->selectedItems();
itemListSize = list1.size();
out<<itemListSize;
foreach( QGraphicsItem item, list1)
{
out << item->x();
out << item->y();
}
[/code]

and for pasting it back i use the following code

[code]QFile file("fileName.dat");
QList<QGraphicsItem *> list1 = this->selectedItems();
file.open(QIODevice::ReadOnly);
QDataStream in(&file);
in>>itemListSize;
foreach(QGraphicsItem *item, list1)
{
in >> item->x();
in >> item->y();
scene1->addItem(item);
}

file.close();[/code]

but i cannot get the items x and y position while reading data. Am i serializing in the correct way, plz help me out.
And this is how i call the rect item using a mousePressEvent from my DiagramItem class

[code]{
if (mouseEvent->button() != Qt::LeftButton)
return;

 DiagramItem *item;
 switch (myMode) {

case InsertItem:
item = new DiagramItem(myItemType);
item->setBrush(myItemColor);
addItem(item);
item->setPos(mouseEvent->scenePos());
emit itemInserted(item);
break;

   ;  
 }

 QGraphicsScene::mousePressEvent(mouseEvent);

}
[/code]

This is the code written for creating a polygon item in my DiagramItem's class constructor

[code]myDiagramType = diagramType;
QPainterPath path;
switch (myDiagramType) {
case Step:
myPolygon << QPointF(-100, -100) << QPointF(100, -100)
<< QPointF(100, 100) << QPointF(-100, 100)
<< QPointF(-100, -100);
}
setPolygon(myPolygon);

 setFlag(QGraphicsItem::ItemIsMovable, true);
 setFlag(QGraphicsItem::ItemIsSelectable, true);
 setFlag(QGraphicsItem::ItemSendsGeometryChanges, true);

}[/code]

if suggested any changes that has to be done in the code will be much helpfull ;(