QT画图

if (0)

    {

        QApplication a(argv, args);

        QGraphicsScene scene;

        scene.setSceneRect(-300,-300,600,600);

        scene.setItemIndexMethod(QGraphicsScene::NoIndex);

#if 0

        {

            QString name = "dec0";

            QGraphicsItemGroup* dec = createIPU(name, 0, 0);

            scene.addItem(dec);

            //QString name = "display";

            QGraphicsItemGroup* ids = createIPU("display", 50, 50);

            scene.addItem(ids);

        }

#endif

        QGraphicsView view(&scene);

        view.setRenderHint(QPainter::Antialiasing);

        view.setCacheMode(QGraphicsView::CacheBackground);

        view.setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);

        view.setDragMode(QGraphicsView::ScrollHandDrag);

        view.resize(400,300);

        view.show();

        return a.exec();

    }