/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the examples of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include <QtGui>+
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#include "helper.h"+
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+
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//! [0]+
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Helper::Helper()+
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{+
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    QLinearGradient gradient(QPointF(50, -20), QPointF(80, 20));+
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    gradient.setColorAt(0.0, Qt::white);+
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    gradient.setColorAt(1.0, QColor(0xa6, 0xce, 0x39));+
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+
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    background = QBrush(QColor(64, 32, 64));+
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    circleBrush = QBrush(gradient);+
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    circlePen = QPen(Qt::black);+
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    circlePen.setWidth(1);+
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    textPen = QPen(Qt::white);+
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    textFont.setPixelSize(50);+
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}+
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//! [0]+
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+
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//! [1]+
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void Helper::paint(QPainter *painter, QPaintEvent *event, int elapsed)+
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{+
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    painter->fillRect(event->rect(), background);+
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    painter->translate(100, 100);+
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//! [1]+
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+
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//! [2]+
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    painter->save();+
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    painter->setBrush(circleBrush);+
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    painter->setPen(circlePen);+
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    painter->rotate(elapsed * 0.030);+
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+
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    qreal r = elapsed/1000.0;+
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    int n = 30;+
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    for (int i = 0; i < n; ++i) {+
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        painter->rotate(30);+
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        qreal radius = 0 + 120.0*((i+r)/n);+
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        qreal circleRadius = 1 + ((i+r)/n)*20;+
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        painter->drawEllipse(QRectF(radius, -circleRadius,+
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                                    circleRadius*2, circleRadius*2));+
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    }+
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    painter->restore();+
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//! [2]+
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+
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//! [3]+
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    painter->setPen(textPen);+
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    painter->setFont(textFont);+
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    painter->drawText(QRect(-50, -50, 100, 100), Qt::AlignCenter, "Qt");+
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}+
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//! [3]+
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