#include <Qt\qapplication.h>
#include <QtGui\qgraphicsscene.h>
#include <QtGui\qgraphicsview.h>
#include <QtGui\qwidget.h>
#include <QtGui\qlabel.h>
#include <QtGui\qscrollarea.h>
#include <QtGui\qboxlayout.h>
#include <QtGui\qgraphicsproxywidget.h>

int main( int argc, char** argv)
{
   QApplication app(argc, argv);

   QGraphicsScene scene(0.0, 0.0, 600.0, 600.0);
   QGraphicsView view(&scene);

   QWidget scrolled_widget;
   QVBoxLayout layout;
   scrolled_widget.setLayout( &layout );
   for( int i = 0; i < 30; i++)
   {
      QString str;
      str = QString("%1").arg(i);
      QLabel* label = new QLabel(str);
      layout.addWidget(label);
   }
   QScrollArea scroll_area;
   scroll_area.setWidget( &scrolled_widget );

   QWidget main_widget;
   QVBoxLayout main_layout;
   main_widget.setLayout( &main_layout );
   main_layout.addWidget( &scroll_area );

   QGraphicsProxyWidget proxy;
   proxy.setCacheMode(QGraphicsItem::DeviceCoordinateCache);
   //proxy.setCacheMode(QGraphicsItem::NoCache);
   proxy.setWindowFlags(proxy.windowFlags() | Qt::Window);
   proxy.setWidget( &main_widget );

   scene.addItem( &proxy );
   
   view.show();
   app.exec();
}