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/****************************************************************************
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**
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** Copyright (C) 2014 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.io
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**
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** This file is part of the Qt Charts module.
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**
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** Licensees holding valid commercial license for Qt may use this file in
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** accordance with the Qt License Agreement provided with the Software
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** or, alternatively, in accordance with the terms contained in a written
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** 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.io
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**
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****************************************************************************/
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#include <private/xlogypolardomain_p.h>
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#include <private/qabstractaxis_p.h>
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#include <QtCharts/QLogValueAxis>
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#include <QtCore/QtMath>
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QT_CHARTS_BEGIN_NAMESPACE
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XLogYPolarDomain::XLogYPolarDomain(QObject *parent)
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: PolarDomain(parent),
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m_logInnerY(0),
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m_logOuterY(1),
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m_logBaseY(10)
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{
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}
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XLogYPolarDomain::~XLogYPolarDomain()
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{
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}
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void XLogYPolarDomain::setRange(qreal minX, qreal maxX, qreal minY, qreal maxY)
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{
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bool axisXChanged = false;
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bool axisYChanged = false;
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adjustLogDomainRanges(minY, maxY);
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if (!qFuzzyIsNull(m_minX - minX) || !qFuzzyIsNull(m_maxX - maxX)) {
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m_minX = minX;
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m_maxX = maxX;
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axisXChanged = true;
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if (!m_signalsBlocked)
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emit rangeHorizontalChanged(m_minX, m_maxX);
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}
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if (!qFuzzyIsNull(m_minY - minY) || !qFuzzyIsNull(m_maxY - maxY)) {
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m_minY = minY;
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m_maxY = maxY;
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axisYChanged = true;
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qreal logMinY = log10(m_minY) / log10(m_logBaseY);
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qreal logMaxY = log10(m_maxY) / log10(m_logBaseY);
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m_logInnerY = logMinY < logMaxY ? logMinY : logMaxY;
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m_logOuterY = logMinY > logMaxY ? logMinY : logMaxY;
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if (!m_signalsBlocked)
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emit rangeVerticalChanged(m_minY, m_maxY);
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}
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if (axisXChanged || axisYChanged)
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emit updated();
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}
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void XLogYPolarDomain::zoomIn(const QRectF &rect)
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{
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storeZoomReset();
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qreal dx = spanX() / m_size.width();
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qreal maxX = m_maxX;
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qreal minX = m_minX;
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maxX = minX + dx * rect.right();
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minX = minX + dx * rect.left();
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qreal logLeftY = m_logOuterY - rect.bottom() * (m_logOuterY - m_logInnerY) / m_size.height();
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qreal logRightY = m_logOuterY - rect.top() * (m_logOuterY - m_logInnerY) / m_size.height();
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qreal leftY = qPow(m_logBaseY, logLeftY);
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qreal rightY = qPow(m_logBaseY, logRightY);
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qreal minY = leftY < rightY ? leftY : rightY;
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qreal maxY = leftY > rightY ? leftY : rightY;
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setRange(minX, maxX, minY, maxY);
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}
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void XLogYPolarDomain::zoomOut(const QRectF &rect)
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{
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storeZoomReset();
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qreal dx = spanX() / rect.width();
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qreal maxX = m_maxX;
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qreal minX = m_minX;
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minX = maxX - dx * rect.right();
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maxX = minX + dx * m_size.width();
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const qreal factorY = m_size.height() / rect.height();
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qreal newLogMinY = m_logInnerY + (m_logOuterY - m_logInnerY) / 2.0 * (1.0 - factorY);
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qreal newLogMaxY = m_logInnerY + (m_logOuterY - m_logInnerY) / 2.0 * (1.0 + factorY);
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qreal leftY = qPow(m_logBaseY, newLogMinY);
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qreal rightY = qPow(m_logBaseY, newLogMaxY);
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qreal minY = leftY < rightY ? leftY : rightY;
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qreal maxY = leftY > rightY ? leftY : rightY;
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setRange(minX, maxX, minY, maxY);
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}
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void XLogYPolarDomain::move(qreal dx, qreal dy)
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{
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qreal x = spanX() / 360.0;
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qreal maxX = m_maxX;
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qreal minX = m_minX;
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if (dx != 0) {
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minX = minX + x * dx;
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maxX = maxX + x * dx;
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}
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qreal stepY = dy * (m_logOuterY - m_logInnerY) / m_radius;
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qreal leftY = qPow(m_logBaseY, m_logInnerY + stepY);
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qreal rightY = qPow(m_logBaseY, m_logOuterY + stepY);
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qreal minY = leftY < rightY ? leftY : rightY;
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qreal maxY = leftY > rightY ? leftY : rightY;
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setRange(minX, maxX, minY, maxY);
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}
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qreal XLogYPolarDomain::toAngularCoordinate(qreal value, bool &ok) const
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{
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ok = true;
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qreal f = (value - m_minX) / (m_maxX - m_minX);
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return f * 360.0;
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}
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qreal XLogYPolarDomain::toRadialCoordinate(qreal value, bool &ok) const
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{
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qreal retVal;
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if (value <= 0) {
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ok = false;
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retVal = 0.0;
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} else {
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ok = true;
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const qreal tickSpan = m_radius / qAbs(m_logOuterY - m_logInnerY);
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const qreal logValue = log10(value) / log10(m_logBaseY);
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const qreal valueDelta = logValue - m_logInnerY;
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retVal = valueDelta * tickSpan;
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if (retVal < 0.0)
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retVal = 0.0;
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}
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return retVal;
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}
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QPointF XLogYPolarDomain::calculateDomainPoint(const QPointF &point) const
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{
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if (point == m_center)
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return QPointF(0.0, m_minY);
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QLineF line(m_center, point);
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qreal a = 90.0 - line.angle();
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if (a < 0.0)
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a += 360.0;
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a = ((a / 360.0) * (m_maxX - m_minX)) + m_minX;
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const qreal deltaY = m_radius / qAbs(m_logOuterY - m_logInnerY);
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qreal r = qPow(m_logBaseY, m_logInnerY + (line.length() / deltaY));
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return QPointF(a, r);
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}
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bool XLogYPolarDomain::attachAxis(QAbstractAxis *axis)
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{
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QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis);
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if (logAxis && logAxis->orientation() == Qt::Vertical) {
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QObject::connect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleVerticalAxisBaseChanged(qreal)));
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handleVerticalAxisBaseChanged(logAxis->base());
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}
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return AbstractDomain::attachAxis(axis);
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}
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bool XLogYPolarDomain::detachAxis(QAbstractAxis *axis)
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{
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QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis);
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if (logAxis && logAxis->orientation() == Qt::Vertical)
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QObject::disconnect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleVerticalAxisBaseChanged(qreal)));
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return AbstractDomain::detachAxis(axis);
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}
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void XLogYPolarDomain::handleVerticalAxisBaseChanged(qreal baseY)
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{
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m_logBaseY = baseY;
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qreal logMinY = log10(m_minY) / log10(m_logBaseY);
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qreal logMaxY = log10(m_maxY) / log10(m_logBaseY);
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m_logInnerY = logMinY < logMaxY ? logMinY : logMaxY;
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m_logOuterY = logMinY > logMaxY ? logMinY : logMaxY;
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emit updated();
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}
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// operators
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bool QT_CHARTS_AUTOTEST_EXPORT operator== (const XLogYPolarDomain &domain1, const XLogYPolarDomain &domain2)
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{
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return (qFuzzyIsNull(domain1.m_maxX - domain2.m_maxX)
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&& qFuzzyIsNull(domain1.m_maxY - domain2.m_maxY)
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&& qFuzzyIsNull(domain1.m_minX - domain2.m_minX)
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&& qFuzzyIsNull(domain1.m_minY - domain2.m_minY));
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}
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bool QT_CHARTS_AUTOTEST_EXPORT operator!= (const XLogYPolarDomain &domain1, const XLogYPolarDomain &domain2)
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{
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return !(domain1 == domain2);
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}
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QDebug QT_CHARTS_AUTOTEST_EXPORT operator<<(QDebug dbg, const XLogYPolarDomain &domain)
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{
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#ifdef QT_NO_TEXTSTREAM
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Q_UNUSED(domain)
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#else
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dbg.nospace() << "AbstractDomain(" << domain.m_minX << ',' << domain.m_maxX << ',' << domain.m_minY << ',' << domain.m_maxY << ')' << domain.m_size;
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#endif
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return dbg.maybeSpace();
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}
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#include "moc_xlogypolardomain_p.cpp"
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QT_CHARTS_END_NAMESPACE
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