[Qt-interest] mouse/dragdrop events in Qgraphics

[Mahendra G.R]

Hi all,

i'm trying to implent dragdrop functionality in Qgraphics, but for some
reason when i drag, the items(polygons in my case) are not moving.  i'm
attaching the source code, can anyone please shed some light.


int main(int argc, char *argv[])

      {

          QApplication a(argc, argv);

          QGraphicsScene scene;
    QGraphicsView view;
    QPixmap pixmap("cross_out.PNG");
    QPolygonF polygon1,polygon2;
    QGraphicsPolygonItem item1,item2;

    scene.addPixmap(pixmap);
    scene.blockSignals(true);


        polygon1 << QPointF(50.4, 20.5) << QPointF(100.2,
40.2)<<QPointF(100.2, 100.2)<<QPointF(50.4,100.5);
    polygon2 << QPointF(200.4, 200.5) << QPointF(200.2,
90.2)<<QPointF(220.2, 100.2);
    item1.setPen(QPen(Qt::red));
    item1.setPolygon(polygon1);
    item1.setAcceptDrops(true);
    item1.setFlag(QGraphicsPolygonItem::ItemIsMovable);

    item2.setPen(QPen(Qt::blue));
    item2.setPolygon(polygon2);
    item2.setAcceptDrops(true);
    item2.setFlag(QGraphicsPolygonItem::ItemIsMovable);



    scene.addItem(&item1);
    scene.addItem(&item2);

    view.setHorizontalScrollBarPolicy ( Qt::ScrollBarAlwaysOff );
    view.setVerticalScrollBarPolicy ( Qt::ScrollBarAlwaysOff );
    view.setScene(&scene);
    view.resize(300,300);
    view.show();


    return a.exec();

      }




which method(s) should i override, mouserelese/move/press events or the
drag/drop events in order to move the polygons and get the current vertices
of the polygon after it is moved.



Thanks,
Best regards

-- 
http://www.mahendragr.com
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