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     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 test suite 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.

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    28 ** If you have questions regarding the use of this file, please contact

    29 ** Nokia at qt-info@nokia.com.

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    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 #include <QtGui>

    42 #include "valgrind/callgrind.h"

    43 

    44 class ItemMover : public QObject

    45 {

    46     Q_OBJECT

    47 public:

    48     ItemMover(QGraphicsItem *item)

    49         : _item(item)

    50     {

    51         startTimer(0);

    52     }

    53 

    54 protected:

    55     void timerEvent(QTimerEvent *event)

    56     {

    57         _item->moveBy(-1, 0);

    58     }

    59 

    60 private:

    61     QGraphicsItem *_item;

    62 };

    63 

    64 class ClipItem : public QGraphicsRectItem

    65 {

    66 public:

    67     ClipItem(qreal x, qreal y, qreal w, qreal h, const QPen &pen, const QBrush &brush)

    68         : QGraphicsRectItem(x, y, w, h)

    69     {

    70         setPen(pen);

    71         setBrush(brush);

    72     }

    73 

    74     QPainterPath shape() const

    75     {

    76         QPainterPath path;

    77         path.addRect(rect());

    78         return path;

    79     }

    80 };

    81 

    82 class CountView : public QGraphicsView

    83 {

    84 protected:

    85     void paintEvent(QPaintEvent *event)

    86     {

    87         static int n = 0;

    88         if (n)

    89             CALLGRIND_START_INSTRUMENTATION

    90         QGraphicsView::paintEvent(event);

    91         if (n)

    92             CALLGRIND_STOP_INSTRUMENTATION

    93         if (++n == 500)

    94             qApp->quit();

    95     }

    96 };

    97 

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

    99 {

   100     QApplication app(argc, argv);

   101 

   102     QGraphicsScene scene;

   103     scene.setItemIndexMethod(QGraphicsScene::NoIndex);

   104 

   105     ClipItem *clipItem = new ClipItem(0, 0, 100, 100, QPen(), QBrush(Qt::blue));

   106     clipItem->setFlag(QGraphicsItem::ItemClipsChildrenToShape);

   107     clipItem->setData(0, "clipItem");

   108     scene.addItem(clipItem);

   109 

   110     QGraphicsRectItem *scrollItem = scene.addRect(0, 0, 10, 10, QPen(Qt::NoPen), QBrush(Qt::NoBrush));

   111     scrollItem->setParentItem(clipItem);

   112     scrollItem->setFlag(QGraphicsItem::ItemIsMovable);

   113     scrollItem->setData(0, "scrollItem");

   114 

   115     for (int y = 0; y < 25; ++y) {

   116         for (int x = 0; x < 25; ++x) {

   117             ClipItem *rect = new ClipItem(0, 0, 90, 20, QPen(Qt::NoPen), QBrush(Qt::green));

   118             rect->setParentItem(scrollItem);

   119             rect->setPos(x * 95, y * 25);

   120             rect->setData(0, qPrintable(QString("rect %1 %2").arg(x).arg(y)));

   121             rect->setFlag(QGraphicsItem::ItemClipsChildrenToShape);

   122 

   123             QGraphicsEllipseItem *ellipse = new QGraphicsEllipseItem(-5, -5, 10, 10);

   124             ellipse->setPen(QPen(Qt::NoPen));

   125             ellipse->setBrush(QBrush(Qt::yellow));

   126             ellipse->setParentItem(rect);

   127             ellipse->setData(0, qPrintable(QString("ellipse %1 %2").arg(x).arg(y)));

   128         }

   129     }

   130 

   131     scrollItem->setRect(scrollItem->childrenBoundingRect());

   132 

   133 #if 0

   134     ItemMover mover(scrollItem);

   135 #endif

   136 

   137     CountView view;

   138     view.setScene(&scene);

   139     view.setSceneRect(-25, -25, 150, 150);

   140     view.resize(300, 300);

   141     view.show();

   142 

   143     return app.exec();

   144 }

   145 

   146 #include "main.moc"