This is probably something very obvious, but I have a new to Qt and can't figure it out. I have a simple MainWindow which has one button. When that button is clicked I want to create a QGraphicsScene, add a few lines and then show that in the Window. However when I run this code in a Window it does not show up.
BUT, if I run this as a QApplication, it shows up just fine. What am I missing?
Here is the code in the MainWindow:
void TheDrawings::drawScene() {
qDebug() << "Setting up Scene";
QGraphicsScene scene(QRect(-50, -50, 400, 200));
QPen pen(Qt::red, 3, Qt::DashDotDotLine);
QGraphicsRectItem *rectItem = new QGraphicsRectItem(QRect(-50, -50, 400,
200), 0, &scene);
rectItem->setPen(pen);
rectItem->setBrush(Qt::gray);
QGraphicsSimpleTextItem *textItem = new QGraphicsSimpleTextItem(
"Amit Bahree", 0, &scene);
textItem->setPos(50, 0);
QGraphicsEllipseItem *eclipseItem = new QGraphicsEllipseItem(QRect(170, 20,
100, 75), 0, &scene);
eclipseItem->setPen(QPen(Qt::darkBlue));
eclipseItem->setBrush(Qt::darkBlue);
QGraphicsPolygonItem *polygonItem = new QGraphicsPolygonItem(QPolygonF(
QVector<QPointF> () << QPointF(10, 10) << QPointF(0, 90)
<< QPointF(40, 70) << QPointF(80, 110) << QPointF(70, 20)),
0, &scene);
polygonItem->setPen(QPen(Qt::darkGreen));
polygonItem->setBrush(Qt::yellow);
qDebug() << "Setting up the view";
QGraphicsView view;
view.setScene(&scene);
view.show();
}