Problem with QModelIndex

[Kesy]

Hi everybody, I'm writing a program with QT 4.4
I'm writing a program to read email from a SQLite database, I used a QSqlQueryModel and a QTableView, when I select a row of the table it returns a QModelIndex

connect(myTable, SIGNAL(clicked(QModelIndex)),myTextBrowser, SLOT(dispayMail(QModelIndex)));

connect(myTable, SIGNAL(clicked(QModelIndex)),myTextBrowser, SLOT(dispayMail(QModelIndex)));

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I want that instead a QModelIndex it returns the email id, or else, how i get the email id from the QModelIndex?

Here is the code: (just a part of it, if you need more I will post it)

QSqlQuery query("SELECT email.id,addresses.name,email.subject,email.date FROM email,addresses WHERE addresses.id=email.'from'");
	model = new QSqlQueryModel;
	model->setQuery(query);
        model->removeColumn(0); // don't show the ID
        model->setHeaderData(0, Qt::Horizontal, tr("Da"));
        model->setHeaderData(1, Qt::Horizontal, tr("Soggetto"));
	model->setHeaderData(2, Qt::Horizontal, tr("Data"));
 
	this->setShowGrid(FALSE);
	this->verticalHeader()->hide();
	this->setEditTriggers(QAbstractItemView::NoEditTriggers);
	this->setSelectionMode(QAbstractItemView::ContiguousSelection);
	this->setSelectionBehavior(QAbstractItemView::SelectRows);
        this->setSelectionMode(QAbstractItemView::ExtendedSelection);
	this->setModel(model);
        this->show();

QSqlQuery query("SELECT email.id,addresses.name,email.subject,email.date FROM email,addresses WHERE addresses.id=email.'from'");
	model = new QSqlQueryModel;
	model->setQuery(query);
        model->removeColumn(0); // don't show the ID
        model->setHeaderData(0, Qt::Horizontal, tr("Da"));
        model->setHeaderData(1, Qt::Horizontal, tr("Soggetto"));
	model->setHeaderData(2, Qt::Horizontal, tr("Data"));
	
	this->setShowGrid(FALSE);
	this->verticalHeader()->hide();
	this->setEditTriggers(QAbstractItemView::NoEditTriggers);
	this->setSelectionMode(QAbstractItemView::ContiguousSelection);
	this->setSelectionBehavior(QAbstractItemView::SelectRows);
        this->setSelectionMode(QAbstractItemView::ExtendedSelection);
	this->setModel(model);
        this->show();

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Thanks

Ps: Sorry for my english, but I'm swiss