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# main.cpp Example File
graphicsview/collidingmice/main.cpp

     /****************************************************************************
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     ** Contact: Qt Software Information (qt-info@nokia.com)
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     ** This file is part of the examples of the Qt Toolkit.
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     ** Alternatively, this file may be used under the terms of the GNU
     ** General Public License version 3.0 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.GPL included in the
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     #include "mouse.h"

     #include <QtGui>

     #include <math.h>

     static const int MouseCount = 7;

     int main(int argc, char **argv)
     {
         QApplication app(argc, argv);
         qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));

         QGraphicsScene scene;
         scene.setSceneRect(-300, -300, 600, 600);
         scene.setItemIndexMethod(QGraphicsScene::NoIndex);

         for (int i = 0; i < MouseCount; ++i) {
             Mouse *mouse = new Mouse;
             mouse->setPos(::sin((i * 6.28) / MouseCount) * 200,
                           ::cos((i * 6.28) / MouseCount) * 200);
             scene.addItem(mouse);
         }

         QGraphicsView view(&scene);
         view.setRenderHint(QPainter::Antialiasing);
         view.setBackgroundBrush(QPixmap(":/images/cheese.jpg"));
         view.setCacheMode(QGraphicsView::CacheBackground);
         view.setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
         view.setDragMode(QGraphicsView::ScrollHandDrag);
         view.setWindowTitle(QT_TRANSLATE_NOOP(QGraphicsView, "Colliding Mice"));
         view.resize(400, 300);
         view.show();

         QTimer timer;
         QObject::connect(&timer, SIGNAL(timeout()), &scene, SLOT(advance()));
         timer.start(1000 / 33);

         return app.exec();
     }