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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <private/xlogypolardomain_p.h>
#include <private/qabstractaxis_p.h>
#include <QtCharts/QLogValueAxis>
#include <QtCore/QtMath>
#include <cmath>
QT_BEGIN_NAMESPACE
XLogYPolarDomain::XLogYPolarDomain(QObject *parent)
: PolarDomain(parent),
m_logInnerY(0),
m_logOuterY(1),
m_logBaseY(10)
{
}
XLogYPolarDomain::~XLogYPolarDomain()
{
}
void XLogYPolarDomain::setRange(qreal minX, qreal maxX, qreal minY, qreal maxY)
{
bool axisXChanged = false;
bool axisYChanged = false;
adjustLogDomainRanges(minY, maxY);
if (!qFuzzyIsNull(m_minX - minX) || !qFuzzyIsNull(m_maxX - maxX)) {
m_minX = minX;
m_maxX = maxX;
axisXChanged = true;
if (!m_signalsBlocked)
emit rangeHorizontalChanged(m_minX, m_maxX);
}
if (!qFuzzyIsNull(m_minY - minY) || !qFuzzyIsNull(m_maxY - maxY)) {
m_minY = minY;
m_maxY = maxY;
axisYChanged = true;
qreal logMinY = qLn(m_minY) / qLn(m_logBaseY);
qreal logMaxY = qLn(m_maxY) / qLn(m_logBaseY);
m_logInnerY = logMinY < logMaxY ? logMinY : logMaxY;
m_logOuterY = logMinY > logMaxY ? logMinY : logMaxY;
if (!m_signalsBlocked)
emit rangeVerticalChanged(m_minY, m_maxY);
}
if (axisXChanged || axisYChanged)
emit updated();
}
void XLogYPolarDomain::zoomIn(const QRectF &rect)
{
storeZoomReset();
qreal dx = spanX() / m_size.width();
qreal maxX = m_maxX;
qreal minX = m_minX;
maxX = minX + dx * rect.right();
minX = minX + dx * rect.left();
qreal logLeftY = m_logOuterY - rect.bottom() * (m_logOuterY - m_logInnerY) / m_size.height();
qreal logRightY = m_logOuterY - rect.top() * (m_logOuterY - m_logInnerY) / m_size.height();
qreal leftY = qPow(m_logBaseY, logLeftY);
qreal rightY = qPow(m_logBaseY, logRightY);
qreal minY = leftY < rightY ? leftY : rightY;
qreal maxY = leftY > rightY ? leftY : rightY;
setRange(minX, maxX, minY, maxY);
}
void XLogYPolarDomain::zoomOut(const QRectF &rect)
{
storeZoomReset();
qreal dx = spanX() / rect.width();
qreal maxX = m_maxX;
qreal minX = m_minX;
minX = maxX - dx * rect.right();
maxX = minX + dx * m_size.width();
const qreal factorY = m_size.height() / rect.height();
qreal newLogMinY = m_logInnerY + (m_logOuterY - m_logInnerY) / 2.0 * (1.0 - factorY);
qreal newLogMaxY = m_logInnerY + (m_logOuterY - m_logInnerY) / 2.0 * (1.0 + factorY);
qreal leftY = qPow(m_logBaseY, newLogMinY);
qreal rightY = qPow(m_logBaseY, newLogMaxY);
qreal minY = leftY < rightY ? leftY : rightY;
qreal maxY = leftY > rightY ? leftY : rightY;
setRange(minX, maxX, minY, maxY);
}
void XLogYPolarDomain::move(qreal dx, qreal dy)
{
qreal x = spanX() / 360.0;
qreal maxX = m_maxX;
qreal minX = m_minX;
if (dx != 0) {
minX = minX + x * dx;
maxX = maxX + x * dx;
}
qreal stepY = dy * (m_logOuterY - m_logInnerY) / m_radius;
qreal leftY = qPow(m_logBaseY, m_logInnerY + stepY);
qreal rightY = qPow(m_logBaseY, m_logOuterY + stepY);
qreal minY = leftY < rightY ? leftY : rightY;
qreal maxY = leftY > rightY ? leftY : rightY;
setRange(minX, maxX, minY, maxY);
}
qreal XLogYPolarDomain::toAngularCoordinate(qreal value, bool &ok) const
{
ok = true;
qreal f = (value - m_minX) / (m_maxX - m_minX);
return f * 360.0;
}
qreal XLogYPolarDomain::toRadialCoordinate(qreal value, bool &ok) const
{
qreal retVal;
if (value <= 0) {
ok = false;
retVal = 0.0;
} else {
ok = true;
const qreal tickSpan = m_radius / qAbs(m_logOuterY - m_logInnerY);
const qreal logValue = qLn(value) / qLn(m_logBaseY);
const qreal valueDelta = logValue - m_logInnerY;
retVal = valueDelta * tickSpan;
if (retVal < 0.0)
retVal = 0.0;
}
return retVal;
}
QPointF XLogYPolarDomain::calculateDomainPoint(const QPointF &point) const
{
if (point == m_center)
return QPointF(0.0, m_minY);
QLineF line(m_center, point);
qreal a = 90.0 - line.angle();
if (a < 0.0)
a += 360.0;
a = ((a / 360.0) * (m_maxX - m_minX)) + m_minX;
const qreal deltaY = m_radius / qAbs(m_logOuterY - m_logInnerY);
qreal r = qPow(m_logBaseY, m_logInnerY + (line.length() / deltaY));
return QPointF(a, r);
}
bool XLogYPolarDomain::attachAxis(QAbstractAxis *axis)
{
QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis);
if (logAxis && logAxis->orientation() == Qt::Vertical) {
QObject::connect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleVerticalAxisBaseChanged(qreal)));
handleVerticalAxisBaseChanged(logAxis->base());
}
return AbstractDomain::attachAxis(axis);
}
bool XLogYPolarDomain::detachAxis(QAbstractAxis *axis)
{
QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis);
if (logAxis && logAxis->orientation() == Qt::Vertical)
QObject::disconnect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleVerticalAxisBaseChanged(qreal)));
return AbstractDomain::detachAxis(axis);
}
void XLogYPolarDomain::handleVerticalAxisBaseChanged(qreal baseY)
{
m_logBaseY = baseY;
qreal logMinY = qLn(m_minY) / qLn(m_logBaseY);
qreal logMaxY = qLn(m_maxY) / qLn(m_logBaseY);
m_logInnerY = logMinY < logMaxY ? logMinY : logMaxY;
m_logOuterY = logMinY > logMaxY ? logMinY : logMaxY;
emit updated();
}
// operators
bool Q_AUTOTEST_EXPORT operator== (const XLogYPolarDomain &domain1, const XLogYPolarDomain &domain2)
{
return (qFuzzyIsNull(domain1.m_maxX - domain2.m_maxX)
&& qFuzzyIsNull(domain1.m_maxY - domain2.m_maxY)
&& qFuzzyIsNull(domain1.m_minX - domain2.m_minX)
&& qFuzzyIsNull(domain1.m_minY - domain2.m_minY));
}
bool Q_AUTOTEST_EXPORT operator!= (const XLogYPolarDomain &domain1, const XLogYPolarDomain &domain2)
{
return !(domain1 == domain2);
}
QDebug Q_AUTOTEST_EXPORT operator<<(QDebug dbg, const XLogYPolarDomain &domain)
{
#ifdef QT_NO_TEXTSTREAM
Q_UNUSED(domain);
#else
dbg.nospace() << "AbstractDomain(" << domain.m_minX << ',' << domain.m_maxX << ',' << domain.m_minY << ',' << domain.m_maxY << ')' << domain.m_size;
#endif
return dbg.maybeSpace();
}
QT_END_NAMESPACE
#include "moc_xlogypolardomain_p.cpp"
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