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/****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc
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** All rights reserved.
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** For any questions to Digia, please use contact form at http://qt.digia.com
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**
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** This file is part of the Qt Commercial Charts Add-on.
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**
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** $QT_BEGIN_LICENSE$
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia.
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**
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** If you have questions regarding the use of this file, please use
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** contact form at http://qt.digia.com
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "polardomain_p.h"
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#include "qabstractaxis_p.h"
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#include <qmath.h>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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PolarDomain::PolarDomain(QObject *parent)
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: AbstractDomain(parent)
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{
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}
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PolarDomain::~PolarDomain()
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{
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}
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void PolarDomain::setSize(const QSizeF &size)
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{
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Q_ASSERT(size.width() == size.height());
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m_radius = size.height() / 2;
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m_center = QPointF(m_radius, m_radius);
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AbstractDomain::setSize(size);
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}
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QPointF PolarDomain::calculateGeometryPoint(const QPointF &point, bool &ok) const
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{
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qreal r;
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qreal a = toAngularCoordinate(point.x(), ok);
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if (ok)
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r = toRadialCoordinate(point.y(), ok);
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if (ok) {
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return m_center + polarCoordinateToPoint(a, r);
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} else {
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qWarning() << "Logarithm of negative value is undefined. Empty layout returned.";
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return QPointF();
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}
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}
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QVector<QPointF> PolarDomain::calculateGeometryPoints(const QList<QPointF> &vector) const
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{
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QVector<QPointF> result;
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result.resize(vector.count());
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bool ok;
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qreal r;
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qreal a;
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for (int i = 0; i < vector.count(); ++i) {
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a = toAngularCoordinate(vector[i].x(), ok);
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if (ok)
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r = toRadialCoordinate(vector[i].y(), ok);
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if (ok) {
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result[i] = m_center + polarCoordinateToPoint(a, r);
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} else {
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qWarning() << "Logarithm of negative value is undefined. Empty layout returned.";
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return QVector<QPointF>();
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}
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}
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return result;
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}
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QPointF PolarDomain::polarCoordinateToPoint(qreal angularCoordinate, qreal radialCoordinate) const
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{
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qreal dx = qSin(angularCoordinate * (M_PI / 180)) * radialCoordinate;
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qreal dy = qCos(angularCoordinate * (M_PI / 180)) * radialCoordinate;
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return QPointF(dx, -dy);
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}
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#include "moc_polardomain_p.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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