I my dialog only have a button and a QTableView.
the button run the next code:
@ void dlgViewer::insertBtnClick()
{
qDebug()<< "Insert " ;
// pairlist is defined in header like
// QList<QPair<QString, QString> > pairlist ;

 QPair<QString, QString> pair("name0", "address0");
 QPair<QString, QString> pair1("name1", "address1");
 QPair<QString, QString> pair2("name2", "address2");
 pairlist.append(pair);
 pairlist.append(pair1);
 pairlist.append(pair2);

 contentTableModel->setList(pairlist);
 //until here the contentTableView show the added pairs
 // the next changes not are reflected

  QPair<QString, QString> pair3("name3", "address3");



 pairlist.append(pair3);
 pairlist.append(pair3);

 contentTableModel->layoutChanged();

 qDebug()<<"pairlist count: "<< pairlist.count();// print 5

 qDebug()<<"model content count: "<< contentTableModel->contentCount();//print 3

}
@

The problem is that the changes in the original list not are reflected in the model list.
Debug output is:
@
Insert
model count befor: 0
model count after: 3
pairlist count: 5
model content count: 3
@

In the contentTableView only see 3 pairs

In the TableModel.cpp added a method that pass the reference to the list:

@void TableModel::setList(QList<QPair<QString, QString> > & alistofPairs)

{
qDebug()<<"model count befor: " << listOfPairs.count();
listOfPairs= alistofPairs;
qDebug()<< "model count after: " << listOfPairs.count();
emit (layoutChanged());

}@
Also Qlist is Implicit Sharing that mean a shallow copy.

I dont want to store my data in the model, only want to send the reference to my data
What is wrong,