/******************************************************************************** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).** All rights reserved.** Contact: Nokia Corporation (qt-info@nokia.com)**** This file is part of the demonstration applications of the Qt Toolkit.**** $QT_BEGIN_LICENSE:LGPL$** No Commercial Usage** This file contains pre-release code and may not be distributed.** You may use this file in accordance with the terms and conditions** contained in the Technology Preview License Agreement accompanying** this package.**** GNU Lesser General Public License Usage** Alternatively, this file may be used under the terms of the GNU Lesser** General Public License version 2.1 as published by the Free Software** Foundation and appearing in the file LICENSE.LGPL included in the** packaging of this file. Please review the following information to** ensure the GNU Lesser General Public License version 2.1 requirements** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.**** In addition, as a special exception, Nokia gives you certain additional** rights. These rights are described in the Nokia Qt LGPL Exception** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.**** If you have questions regarding the use of this file, please contact** Nokia at qt-info@nokia.com.****************** $QT_END_LICENSE$******************************************************************************/#include "guidecircle.h"static float PI2 = 2*3.1415f;GuideCircle::GuideCircle(const QRectF &rect, float startAngle, float span, DIRECTION dir, Guide *follows) : Guide(follows){ this->radiusX = rect.width() / 2.0; this->radiusY = rect.height() / 2.0; this->posX = rect.topLeft().x(); this->posY = rect.topLeft().y(); this->spanRad = span * PI2 / -360.0; if (dir == CCW){ this->startAngleRad = startAngle * PI2 / -360.0; this->endAngleRad = startAngleRad + spanRad; this->stepAngleRad = this->spanRad / this->length(); } else{ this->startAngleRad = spanRad + (startAngle * PI2 / -360.0); this->endAngleRad = startAngle * PI2 / -360.0; this->stepAngleRad = -this->spanRad / this->length(); }}float GuideCircle::length(){ return qAbs(this->radiusX * spanRad);}QPointF GuideCircle::startPos(){ return QPointF((posX + radiusX + radiusX * cos(startAngleRad)) * scaleX, (posY + radiusY + radiusY * sin(startAngleRad)) * scaleY);}QPointF GuideCircle::endPos(){ return QPointF((posX + radiusX + radiusX * cos(endAngleRad)) * scaleX, (posY + radiusY + radiusY * sin(endAngleRad)) * scaleY);}void GuideCircle::guide(DemoItem *item, float moveSpeed){ float frame = item->guideFrame - this->startLength; QPointF end((posX + radiusX + radiusX * cos(startAngleRad + (frame * stepAngleRad))) * scaleX, (posY + radiusY + radiusY * sin(startAngleRad + (frame * stepAngleRad))) * scaleY); this->move(item, end, moveSpeed);}