/****************************************************************************+
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**+
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** Copyright (C) 2009 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 demonstration applications 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 "guidecircle.h"+
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+
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static float PI2 = 2*3.1415f;+
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+
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GuideCircle::GuideCircle(const QRectF &rect, float startAngle, float span, DIRECTION dir, Guide *follows) : Guide(follows)+
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{+
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    this->radiusX = rect.width() / 2.0;+
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    this->radiusY = rect.height() / 2.0;+
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    this->posX = rect.topLeft().x();+
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    this->posY = rect.topLeft().y();+
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    this->spanRad = span * PI2 / -360.0;+
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    if (dir == CCW){+
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        this->startAngleRad = startAngle * PI2 / -360.0;+
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        this->endAngleRad = startAngleRad + spanRad;+
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        this->stepAngleRad = this->spanRad / this->length();+
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    }+
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    else{+
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        this->startAngleRad = spanRad + (startAngle * PI2 / -360.0);+
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        this->endAngleRad = startAngle * PI2 / -360.0;+
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        this->stepAngleRad = -this->spanRad / this->length();+
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    }+
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}+
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+
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float GuideCircle::length()+
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{+
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    return qAbs(this->radiusX * spanRad);+
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}+
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+
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QPointF GuideCircle::startPos()+
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{+
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    return QPointF((posX + radiusX + radiusX * cos(startAngleRad)) * scaleX,+
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                   (posY + radiusY + radiusY * sin(startAngleRad)) * scaleY);+
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}+
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+
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QPointF GuideCircle::endPos()+
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{+
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    return QPointF((posX + radiusX + radiusX * cos(endAngleRad)) * scaleX,+
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                   (posY + radiusY + radiusY * sin(endAngleRad)) * scaleY);+
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}+
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+
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void GuideCircle::guide(DemoItem *item, float moveSpeed)+
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{+
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    float frame = item->guideFrame - this->startLength;+
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    QPointF end((posX + radiusX + radiusX * cos(startAngleRad + (frame * stepAngleRad))) * scaleX,+
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                (posY + radiusY + radiusY * sin(startAngleRad + (frame * stepAngleRad))) * scaleY);+
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    this->move(item, end, moveSpeed);+
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}+
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