#include <QtGui>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QGraphicsScene scene(QRectF(-100, -100, 300, 300));
    QGraphicsView view(&scene);

    QGraphicsRectItem* rectItem = new QGraphicsRectItem(0, &scene);
    rectItem->setPen(QPen(Qt::black));
    rectItem->setBrush(QBrush(Qt::green));
    rectItem->setRect(QRectF(-30, -30, 120, 80));
    rectItem->setFlags(QGraphicsItem::ItemIsMovable);

    QGraphicsTextItem* textItem = scene.addText("Move us with your mouse");
    textItem->setDefaultTextColor(Qt::red);
    textItem->setFlags(QGraphicsItem::ItemIsMovable);

    QPushButton* button = new QPushButton("Ok");
    QGraphicsProxyWidget* widgetItem = scene.addWidget(button);
    widgetItem->setPos(0, 0);
    widgetItem->setFlags(QGraphicsItem::ItemIsMovable);

    QLabel* lbl = new QLabel("Label");
    QGraphicsProxyWidget* labelItem = scene.addWidget(lbl);
    labelItem->setPos(30, 30);
    labelItem->setFlag(QGraphicsItem::ItemIsMovable, true);

    view.show();

    return a.exec();
}