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Diffstat (limited to 'src/charts/domain/xlogypolardomain.cpp')
| -rw-r--r-- | src/charts/domain/xlogypolardomain.cpp | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/src/charts/domain/xlogypolardomain.cpp b/src/charts/domain/xlogypolardomain.cpp new file mode 100644 index 00000000..76c92c51 --- /dev/null +++ b/src/charts/domain/xlogypolardomain.cpp @@ -0,0 +1,237 @@ +/**************************************************************************** +** +** Copyright (C) 2014 Digia Plc +** All rights reserved. +** For any questions to Digia, please use contact form at http://qt.digia.com +** +** This file is part of the Qt Enterprise Charts Add-on. +** +** $QT_BEGIN_LICENSE$ +** Licensees holding valid Qt Enterprise licenses may use this file in +** accordance with the Qt Enterprise License Agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Digia. +** +** If you have questions regarding the use of this file, please use +** contact form at http://qt.digia.com +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "xlogypolardomain_p.h" +#include "qabstractaxis_p.h" +#include "qlogvalueaxis.h" +#include <qmath.h> + +QT_CHARTS_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 = log10(m_minY) / log10(m_logBaseY); + qreal logMaxY = log10(m_maxY) / log10(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 = log10(value) / log10(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 = log10(m_minY) / log10(m_logBaseY); + qreal logMaxY = log10(m_maxY) / log10(m_logBaseY); + m_logInnerY = logMinY < logMaxY ? logMinY : logMaxY; + m_logOuterY = logMinY > logMaxY ? logMinY : logMaxY; + emit updated(); +} + +// operators + +bool QT_CHARTS_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 QT_CHARTS_AUTOTEST_EXPORT operator!= (const XLogYPolarDomain &domain1, const XLogYPolarDomain &domain2) +{ + return !(domain1 == domain2); +} + + +QDebug QT_CHARTS_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(); +} + +#include "moc_xlogypolardomain_p.cpp" + +QT_CHARTS_END_NAMESPACE |