QGraphicsView in a QDialog?

[jnadelman]

Thanks! That explains the loop from hell: setScene() and show() were causing paintEvents in the paintEvent.
But I still do not understand how to get the QPixmap into the QGraphicsView.
I moved QGraphicsView and QGraphicsScene out of the paintEvent so that they only get called once.
I moved QPixmap so it is available to the class.
I got rid of the view->show() since I do not think it is needed.
But I still do not see the image in the QGraphicsView.
Am I getting closer at least?

ViewerDialog::ViewerDialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::ViewerDialog)
{
    ui->setupUi(this);
	...
    pixmap = new QPixmap(ui->view->size());
    scene = new QGraphicsScene(ui->view);
}
...
void ViewerDialog::updateUi()
{
    ...
    scene->setSceneRect(ui->view->rect());
    ui->view->setScene(scene);
    scene->addPixmap(*pixmap);
}
...
void ViewerDialog::paintEvent(QPaintEvent *e)
{
    QPainter painter(pixmap);
    vector<SyDataT>::iterator it;
    for (it = sy->syVector.begin(); it < sy->syVector.end(); it++)
    {
        if ((pl == it->pl) && (fr == it->fr))
        {
			...
            QColor color(red, green, blue, alpha);
            painter.setPen(color);
            painter.drawPoint(it->az, it->el);
        }
    }
}

ViewerDialog::ViewerDialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::ViewerDialog)
{
    ui->setupUi(this);
	...
    pixmap = new QPixmap(ui->view->size());
    scene = new QGraphicsScene(ui->view);
}
...
void ViewerDialog::updateUi()
{
    ...
    scene->setSceneRect(ui->view->rect());
    ui->view->setScene(scene);
    scene->addPixmap(*pixmap);
}
...
void ViewerDialog::paintEvent(QPaintEvent *e)
{
    QPainter painter(pixmap);
    vector<SyDataT>::iterator it;
    for (it = sy->syVector.begin(); it < sy->syVector.end(); it++)
    {
        if ((pl == it->pl) && (fr == it->fr))
        {
			...
            QColor color(red, green, blue, alpha);
            painter.setPen(color);
            painter.drawPoint(it->az, it->el);
        }
    }
}

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