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 QTransform transform;    
    transform.translate(20,20);
    transform.rotate(60,Qt::YAxis);
    pixmapItem->setTransform(transform);

#include "widget.h"
#include <QApplication>
#include <QGraphicsScene>
#include <QGraphicsPixmapItem>
#include <QGraphicsDropShadowEffect>
#include <QGraphicsView>

int main(int argc, char *argv[])
{
        QApplication app(argc,argv);
        QGraphicsScene scene;

        QGraphicsPixmapItem* pixmapItem = new QGraphicsPixmapItem(*(new QPixmap(":/Number.jpg")));
        pixmapItem->setFlags(QGraphicsItem::ItemIsMovable);

        QGraphicsDropShadowEffect* effect = new QGraphicsDropShadowEffect();
        effect->setBlurRadius(20);
        effect->setOffset(20,20);

        pixmapItem->setGraphicsEffect(effect);

        qreal x = pixmapItem->boundingRect().width()/2;
        qreal y =pixmapItem->boundingRect().height()/2;

        QTransform transform;
        transform.translate(x,y).rotate(60,Qt::XAxis).translate(-x,y);
        pixmapItem->setTransform(transform);

        QGraphicsView view(&scene);

        scene.addItem(pixmapItem);

        view.showFullScreen();

        return app.exec();
}