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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <private/polardomain_p.h>
#include <private/qabstractaxis_p.h>
#include <QtCore/QtMath>
QT_BEGIN_NAMESPACE
PolarDomain::PolarDomain(QObject *parent)
: AbstractDomain(parent)
{
}
PolarDomain::~PolarDomain()
{
}
void PolarDomain::setSize(const QSizeF &size)
{
Q_ASSERT(size.width() == size.height());
m_radius = size.height() / 2.0;
m_center = QPointF(m_radius, m_radius);
AbstractDomain::setSize(size);
}
QPointF PolarDomain::calculateGeometryPoint(const QPointF &point, bool &ok) const
{
qreal r = 0.0;
qreal a = toAngularCoordinate(point.x(), ok);
if (ok)
r = toRadialCoordinate(point.y(), ok);
if (ok) {
return m_center + polarCoordinateToPoint(a, r);
} else {
qWarning() << "Logarithm of negative value is undefined. Empty layout returned.";
return QPointF();
}
}
QList<QPointF> PolarDomain::calculateGeometryPoints(const QList<QPointF> &list) const
{
QList<QPointF> result;
result.resize(list.size());
bool ok;
qreal r = 0.0;
qreal a = 0.0;
for (int i = 0; i < list.size(); ++i) {
a = toAngularCoordinate(list[i].x(), ok);
if (ok)
r = toRadialCoordinate(list[i].y(), ok);
if (ok) {
result[i] = m_center + polarCoordinateToPoint(a, r);
} else {
qWarning() << "Logarithm of negative value is undefined. Empty layout returned.";
return QList<QPointF>();
}
}
return result;
}
QPointF PolarDomain::polarCoordinateToPoint(qreal angularCoordinate, qreal radialCoordinate) const
{
qreal dx = qSin(qDegreesToRadians(angularCoordinate)) * radialCoordinate;
qreal dy = qCos(qDegreesToRadians(angularCoordinate)) * radialCoordinate;
return QPointF(dx, -dy);
}
QT_END_NAMESPACE
#include "moc_polardomain_p.cpp"