hi....
I am adding more than 10000 qgraohics item and added to scene is done but but later on crahes on QMetaObject.cpp on line 266

here is calls start from qt_is_translatable_mouse_event at qapplication_win.cpp:

0 QMetaObject::cast qmetaobject.cpp 266 0x6a200e27
1 qobject_cast<QGesture*> qobject.h 451 0x021fd27e
2 QApplication::notify qapplication.cpp 3633 0x01befcef
3 QCoreApplication::notifyInternal qcoreapplication.cpp 704 0x6a1fc512
4 QCoreApplication::sendEvent qcoreapplication.h 215 0x02240ffe
5 QGraphicsScenePrivate::sendEvent qgraphicsscene.cpp 1134 0x021756aa
6 QGraphicsScene::sendEvent qgraphicsscene.cpp 5473 0x02183ab3
7 QGraphicsItem::sceneEvent qgraphicsitem.cpp 6580 0x0215bb93
8 QGraphicsScenePrivate::sendEvent qgraphicsscene.cpp 1138 0x021756e2
9 QGraphicsScene::sendEvent qgraphicsscene.cpp 5473 0x02183ab3
10 QGraphicsScene::event qgraphicsscene.cpp 3412 0x0217c030
11 QApplicationPrivate::notify_helper qapplication.cpp 4242 0x01bf2252
12 QApplication::notify qapplication.cpp 3661 0x01befdb7
13 QCoreApplication::notifyInternal qcoreapplication.cpp 704 0x6a1fc512
14 QCoreApplication::sendEvent qcoreapplication.h 215 0x02240ffe
15 QGraphicsView::viewportEvent qgraphicsview.cpp 2651 0x02198f53
16 QAbstractScrollAreaPrivate::viewportEvent qabstractscrollarea_p.h 100 0x02279733
17 QAbstractScrollAreaFilter::eventFilter qabstractscrollarea_p.h 116 0x02277b70
18 QCoreApplicationPrivate::sendThroughObjectEventFil ters qcoreapplication.cpp 819 0x6a1fc7a9
19 QApplicationPrivate::notify_helper qapplication.cpp 4238 0x01bf2231
20 QApplication::notify qapplication.cpp 4207 0x01bf20d3
21 QCoreApplication::notifyInternal qcoreapplication.cpp 704 0x6a1fc512
22 QCoreApplication::sendEvent qcoreapplication.h 215 0x02240ffe
23 QWidget::event qwidget.cpp 8230 0x01c3d172
24 QFrame::event qframe.cpp 557 0x01fa2600
25 QAbstractScrollArea::event qabstractscrollarea.cpp 985 0x0202eea6
26 QGraphicsView::event qgraphicsview.cpp 2625 0x02198d8e
27 QApplicationPrivate::notify_helper qapplication.cpp 4242 0x01bf2252
28 QApplication::notify qapplication.cpp 4207 0x01bf20d3
29 QCoreApplication::notifyInternal qcoreapplication.cpp 704 0x6a1fc512
30 QCoreApplication::sendEvent qcoreapplication.h 215 0x02240ffe
31 QWidget::event qwidget.cpp 8230 0x01c3d172
32 QGroupBox::event qgroupbox.cpp 397 0x01fa3542
33 QApplicationPrivate::notify_helper qapplication.cpp 4242 0x01bf2252
34 QApplication::notify qapplication.cpp 4207 0x01bf20d3
35 QCoreApplication::notifyInternal qcoreapplication.cpp 704 0x6a1fc512
36 QCoreApplication::sendEvent qcoreapplication.h 215 0x02240ffe
37 QWidget::event qwidget.cpp 8230 0x01c3d172
38 QMainWindow::event qmainwindow.cpp 1434 0x01fc0290
39 QApplicationPrivate::notify_helper qapplication.cpp 4242 0x01bf2252
40 QApplication::notify qapplication.cpp 4207 0x01bf20d3
41 QCoreApplication::notifyInternal qcoreapplication.cpp 704 0x6a1fc512
42 QCoreApplication::sendSpontaneousEvent qcoreapplication.h 218 0x02240faa
43 QApplication::setActiveWindow qapplication.cpp 2447 0x01bed726
44 QApplication::winFocus qapplication_win.cpp 1328 0x01c519ca
45 QtWndProc@16 qapplication_win.cpp 1998 0x01c53676
46 USER32!GetDC C:\WINDOWS\system32\user32.dll 0 0x7e418734
47 ?? 0 0x003600f4
48 ?? 0 0x00000006
49 USER32!GetDC C:\WINDOWS\system32\user32.dll 0 0x7e418816
50 qt_is_translatable_mouse_event qapplication_win.cpp 1389 0x01c51b19
51 USER32!DefWindowProcW C:\WINDOWS\system32\user32.dll 0 0x7e428ea0
52 ?? 0 0x00000000