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Diffstat (limited to 'src/charts/domain/logxypolardomain.cpp')
| -rw-r--r-- | src/charts/domain/logxypolardomain.cpp | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/src/charts/domain/logxypolardomain.cpp b/src/charts/domain/logxypolardomain.cpp new file mode 100644 index 00000000..bcbac505 --- /dev/null +++ b/src/charts/domain/logxypolardomain.cpp @@ -0,0 +1,242 @@ +/**************************************************************************** +** +** 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 "logxypolardomain_p.h" +#include "qabstractaxis_p.h" +#include "qlogvalueaxis.h" +#include <qmath.h> + +QT_CHARTS_BEGIN_NAMESPACE + +LogXYPolarDomain::LogXYPolarDomain(QObject *parent) + : PolarDomain(parent), + m_logLeftX(0), + m_logRightX(1), + m_logBaseX(10) +{ +} + +LogXYPolarDomain::~LogXYPolarDomain() +{ +} + +void LogXYPolarDomain::setRange(qreal minX, qreal maxX, qreal minY, qreal maxY) +{ + bool axisXChanged = false; + bool axisYChanged = false; + + adjustLogDomainRanges(minX, maxX); + + if (!qFuzzyCompare(m_minX, minX) || !qFuzzyCompare(m_maxX, maxX)) { + m_minX = minX; + m_maxX = maxX; + axisXChanged = true; + qreal logMinX = log10(m_minX) / log10(m_logBaseX); + qreal logMaxX = log10(m_maxX) / log10(m_logBaseX); + m_logLeftX = logMinX < logMaxX ? logMinX : logMaxX; + m_logRightX = logMinX > logMaxX ? logMinX : logMaxX; + 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; + if (!m_signalsBlocked) + emit rangeVerticalChanged(m_minY, m_maxY); + } + + if (axisXChanged || axisYChanged) + emit updated(); +} + +void LogXYPolarDomain::zoomIn(const QRectF &rect) +{ + storeZoomReset(); + qreal logLeftX = rect.left() * (m_logRightX - m_logLeftX) / m_size.width() + m_logLeftX; + qreal logRightX = rect.right() * (m_logRightX - m_logLeftX) / m_size.width() + m_logLeftX; + qreal leftX = qPow(m_logBaseX, logLeftX); + qreal rightX = qPow(m_logBaseX, logRightX); + qreal minX = leftX < rightX ? leftX : rightX; + qreal maxX = leftX > rightX ? leftX : rightX; + + qreal dy = spanY() / m_size.height(); + qreal minY = m_minY; + qreal maxY = m_maxY; + + minY = maxY - dy * rect.bottom(); + maxY = maxY - dy * rect.top(); + + setRange(minX, maxX, minY, maxY); +} + +void LogXYPolarDomain::zoomOut(const QRectF &rect) +{ + storeZoomReset(); + const qreal factorX = m_size.width() / rect.width(); + + qreal logLeftX = m_logLeftX + (m_logRightX - m_logLeftX) / 2.0 * (1.0 - factorX); + qreal logRIghtX = m_logLeftX + (m_logRightX - m_logLeftX) / 2.0 * (1.0 + factorX); + qreal leftX = qPow(m_logBaseX, logLeftX); + qreal rightX = qPow(m_logBaseX, logRIghtX); + qreal minX = leftX < rightX ? leftX : rightX; + qreal maxX = leftX > rightX ? leftX : rightX; + + qreal dy = spanY() / rect.height(); + qreal minY = m_minY; + qreal maxY = m_maxY; + + maxY = minY + dy * rect.bottom(); + minY = maxY - dy * m_size.height(); + + setRange(minX, maxX, minY, maxY); +} + +void LogXYPolarDomain::move(qreal dx, qreal dy) +{ + qreal stepX = dx * (m_logRightX - m_logLeftX) / m_size.width(); + qreal leftX = qPow(m_logBaseX, m_logLeftX + stepX); + qreal rightX = qPow(m_logBaseX, m_logRightX + stepX); + qreal minX = leftX < rightX ? leftX : rightX; + qreal maxX = leftX > rightX ? leftX : rightX; + + qreal y = spanY() / m_radius; + qreal minY = m_minY; + qreal maxY = m_maxY; + + if (dy != 0) { + minY = minY + y * dy; + maxY = maxY + y * dy; + } + setRange(minX, maxX, minY, maxY); +} + +qreal LogXYPolarDomain::toAngularCoordinate(qreal value, bool &ok) const +{ + qreal retVal; + if (value <= 0) { + ok = false; + retVal = 0.0; + } else { + ok = true; + const qreal tickSpan = 360.0 / qAbs(m_logRightX - m_logLeftX); + const qreal logValue = log10(value) / log10(m_logBaseX); + const qreal valueDelta = logValue - m_logLeftX; + + retVal = valueDelta * tickSpan; + } + return retVal; +} + +qreal LogXYPolarDomain::toRadialCoordinate(qreal value, bool &ok) const +{ + ok = true; + if (value < m_minY) + value = m_minY; + + // Dont limit the max. The drawing should clip the stuff that goes out of the grid + qreal f = (value - m_minY) / (m_maxY - m_minY); + + return f * m_radius; +} + +QPointF LogXYPolarDomain::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; + + const qreal deltaX = 360.0 / qAbs(m_logRightX - m_logLeftX); + a = qPow(m_logBaseX, m_logLeftX + (a / deltaX)); + + qreal r = m_minY + ((m_maxY - m_minY) * (line.length() / m_radius)); + + return QPointF(a, r); +} + +bool LogXYPolarDomain::attachAxis(QAbstractAxis *axis) +{ + AbstractDomain::attachAxis(axis); + QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis); + + if (logAxis && logAxis->orientation() == Qt::Horizontal) { + QObject::connect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleHorizontalAxisBaseChanged(qreal))); + handleHorizontalAxisBaseChanged(logAxis->base()); + } + + return true; +} + +bool LogXYPolarDomain::detachAxis(QAbstractAxis *axis) +{ + AbstractDomain::detachAxis(axis); + QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis); + + if (logAxis && logAxis->orientation() == Qt::Horizontal) + QObject::disconnect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleHorizontalAxisBaseChanged(qreal))); + + return true; +} + +void LogXYPolarDomain::handleHorizontalAxisBaseChanged(qreal baseX) +{ + m_logBaseX = baseX; + qreal logMinX = log10(m_minX) / log10(m_logBaseX); + qreal logMaxX = log10(m_maxX) / log10(m_logBaseX); + m_logLeftX = logMinX < logMaxX ? logMinX : logMaxX; + m_logRightX = logMinX > logMaxX ? logMinX : logMaxX; + emit updated(); +} + +// operators + +bool QT_CHARTS_AUTOTEST_EXPORT operator== (const LogXYPolarDomain &domain1, const LogXYPolarDomain &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 LogXYPolarDomain &domain1, const LogXYPolarDomain &domain2) +{ + return !(domain1 == domain2); +} + + +QDebug QT_CHARTS_AUTOTEST_EXPORT operator<<(QDebug dbg, const LogXYPolarDomain &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_logxypolardomain_p.cpp" + +QT_CHARTS_END_NAMESPACE |