Write QPainterPath to XML - c++

Question

I have a QPainterPath that is being drawn to my QGraphicsScene and I am storing the points of the path as they are drawn into a QList.
My question is how do I now save those points out to an xml ( I assume this would work best ) as they are drawn? My goal is when the app closes, I read that xml, and the path is immediately re-drawn into the scene.
Here is the method I have setup for the writing, which I would call everytime I write a new point to the path.
void writePathToFile(QList pathPoints){
QXmlStreamWriter xml;
QString filename = "../XML/path.xml";
QFile file(filename);
if (!file.open(QFile::WriteOnly | QFile::Text))
qDebug() << "Error saving XML file.";
xml.setDevice(&file);
xml.setAutoFormatting(true);
xml.writeStartDocument();
xml.writeStartElement("path");
// --> no clue what to dump here: xml.writeAttribute("points", ? );
xml.writeEndElement();
xml.writeEndDocument();
}
Or maybe this isn't the best way to go about this?
I think I can handle the reading and re-drawing of the path, but this first part is tricking me up.

Answer 1

You may use binary file:
QPainterPath path;
// do sth
{
QFile file("file.dat");
file.open(QIODevice::WriteOnly);
QDataStream out(&file); // we will serialize the data into the file
out << path; // serialize a path, fortunately there is apriopriate functionality
}
Deserialization is similar:
QPainterPath path;
{
QFile file("file.dat");
file.open(QIODevice::ReadOnly);
QDataStream in(&file); // we will deserialize the data from the file
in >> path;
}
//do sth