examples/multitouch/pinchzoom/main.cpp
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     1 /****************************************************************************
       
     2 **
       
     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
       
     4 ** All rights reserved.
       
     5 ** Contact: Nokia Corporation (qt-info@nokia.com)
       
     6 **
       
     7 ** This file is part of the examples of the Qt Toolkit.
       
     8 **
       
     9 ** $QT_BEGIN_LICENSE:LGPL$
       
    10 ** No Commercial Usage
       
    11 ** This file contains pre-release code and may not be distributed.
       
    12 ** You may use this file in accordance with the terms and conditions
       
    13 ** contained in the Technology Preview License Agreement accompanying
       
    14 ** this package.
       
    15 **
       
    16 ** GNU Lesser General Public License Usage
       
    17 ** Alternatively, this file may be used under the terms of the GNU Lesser
       
    18 ** General Public License version 2.1 as published by the Free Software
       
    19 ** Foundation and appearing in the file LICENSE.LGPL included in the
       
    20 ** packaging of this file.  Please review the following information to
       
    21 ** ensure the GNU Lesser General Public License version 2.1 requirements
       
    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
       
    23 **
       
    24 ** In addition, as a special exception, Nokia gives you certain additional
       
    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception
       
    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
       
    27 **
       
    28 ** If you have questions regarding the use of this file, please contact
       
    29 ** Nokia at qt-info@nokia.com.
       
    30 **
       
    31 **
       
    32 **
       
    33 **
       
    34 **
       
    35 **
       
    36 **
       
    37 **
       
    38 ** $QT_END_LICENSE$
       
    39 **
       
    40 ****************************************************************************/
       
    41 
       
    42 #include "graphicsview.h"
       
    43 #include "mouse.h"
       
    44 
       
    45 #include <QtGui>
       
    46 
       
    47 #include <math.h>
       
    48 
       
    49 static const int MouseCount = 7;
       
    50 
       
    51 //! [0]
       
    52 int main(int argc, char **argv)
       
    53 {
       
    54     QApplication app(argc, argv);
       
    55     qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
       
    56 //! [0]
       
    57 
       
    58 //! [1]
       
    59     QGraphicsScene scene;
       
    60     scene.setSceneRect(-300, -300, 600, 600);
       
    61 //! [1] //! [2]
       
    62     scene.setItemIndexMethod(QGraphicsScene::NoIndex);
       
    63 //! [2]
       
    64 
       
    65 //! [3]
       
    66     for (int i = 0; i < MouseCount; ++i) {
       
    67         Mouse *mouse = new Mouse;
       
    68         mouse->setPos(::sin((i * 6.28) / MouseCount) * 200,
       
    69                       ::cos((i * 6.28) / MouseCount) * 200);
       
    70         scene.addItem(mouse);
       
    71     }
       
    72 //! [3]
       
    73 
       
    74 //! [4]
       
    75     GraphicsView view(&scene);
       
    76     view.setRenderHint(QPainter::Antialiasing);
       
    77     view.setBackgroundBrush(QPixmap(":/images/cheese.jpg"));
       
    78 //! [4] //! [5]
       
    79     view.setCacheMode(QGraphicsView::CacheBackground);
       
    80     view.setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
       
    81 //! [5] //! [6]
       
    82     view.setWindowTitle(QT_TRANSLATE_NOOP(QGraphicsView, "Colliding Mice"));
       
    83     view.showMaximized();
       
    84 
       
    85     return app.exec();
       
    86 }
       
    87 //! [6]