logxlogydomain.cpp
258 lines
| 9.3 KiB
| text/x-c
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CppLexer
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r2275 | /**************************************************************************** | ||
** | ||||
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r2432 | ** Copyright (C) 2013 Digia Plc | ||
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r2275 | ** All rights reserved. | ||
** For any questions to Digia, please use contact form at http://qt.digia.com | ||||
** | ||||
** This file is part of the Qt Commercial Charts Add-on. | ||||
** | ||||
** $QT_BEGIN_LICENSE$ | ||||
** Licensees holding valid Qt Commercial licenses may use this file in | ||||
** accordance with the Qt Commercial 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 "logxlogydomain_p.h" | ||||
#include "qabstractaxis_p.h" | ||||
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r2290 | #include "qlogvalueaxis.h" | ||
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r2275 | #include <qmath.h> | ||
QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
LogXLogYDomain::LogXLogYDomain(QObject *parent) | ||||
: AbstractDomain(parent), | ||||
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r2351 | m_logLeftX(0), | ||
m_logRightX(1), | ||||
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r2275 | m_logBaseX(10), | ||
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r2351 | m_logLeftY(0), | ||
m_logRightY(1), | ||||
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r2275 | m_logBaseY(10) | ||
{ | ||||
} | ||||
LogXLogYDomain::~LogXLogYDomain() | ||||
{ | ||||
} | ||||
void LogXLogYDomain::setRange(qreal minX, qreal maxX, qreal minY, qreal maxY) | ||||
{ | ||||
bool axisXChanged = false; | ||||
bool axisYChanged = false; | ||||
if (!qFuzzyIsNull(m_minX - minX) || !qFuzzyIsNull(m_maxX - maxX)) { | ||||
m_minX = minX; | ||||
m_maxX = maxX; | ||||
axisXChanged = true; | ||||
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r2351 | 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; | ||||
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r2288 | if(!m_signalsBlocked) | ||
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r2356 | emit rangeHorizontalChanged(m_minX, m_maxX); | ||
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r2275 | } | ||
if (!qFuzzyIsNull(m_minY - minY) || !qFuzzyIsNull(m_maxY - maxY)) { | ||||
m_minY = minY; | ||||
m_maxY = maxY; | ||||
axisYChanged = true; | ||||
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r2351 | qreal logMinY = log10(m_minY) / log10(m_logBaseY); | ||
qreal logMaxY = log10(m_maxY) / log10(m_logBaseY); | ||||
m_logLeftY = logMinY < logMaxY ? logMinY : logMaxY; | ||||
m_logRightY = logMinY > logMaxY ? logMinY : logMaxY; | ||||
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r2288 | if(!m_signalsBlocked) | ||
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r2356 | emit rangeVerticalChanged(m_minY, m_maxY); | ||
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r2275 | } | ||
if (axisXChanged || axisYChanged) | ||||
emit updated(); | ||||
} | ||||
void LogXLogYDomain::zoomIn(const QRectF &rect) | ||||
{ | ||||
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r2351 | 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; | ||||
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r2275 | |||
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r2351 | qreal logLeftY = m_logRightY - rect.bottom() * (m_logRightY - m_logLeftY) / m_size.height(); | ||
qreal logRightY = m_logRightY - rect.top() * (m_logRightY - m_logLeftY) / 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; | ||||
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r2275 | |||
setRange(minX, maxX, minY, maxY); | ||||
} | ||||
void LogXLogYDomain::zoomOut(const QRectF &rect) | ||||
{ | ||||
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r2351 | const qreal factorX = m_size.width() / rect.width(); | ||
const qreal factorY = m_size.height() / rect.height(); | ||||
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r2280 | |||
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r2351 | qreal logLeftX = m_logLeftX + (m_logRightX - m_logLeftX) / 2 * (1 - factorX); | ||
qreal logRIghtX = m_logLeftX + (m_logRightX - m_logLeftX) / 2 * (1 + 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 newLogMinY = m_logLeftY + (m_logRightY - m_logLeftY) / 2 * (1 - factorY); | ||||
qreal newLogMaxY = m_logLeftY + (m_logRightY - m_logLeftY) / 2 * (1 + 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; | ||||
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r2275 | |||
setRange(minX, maxX, minY, maxY); | ||||
} | ||||
void LogXLogYDomain::move(qreal dx, qreal dy) | ||||
{ | ||||
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r2351 | qreal stepX = dx * qAbs(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; | ||||
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r2275 | |||
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r2351 | qreal stepY = dy * (m_logRightY - m_logLeftY) / m_size.height(); | ||
qreal leftY = qPow(m_logBaseY, m_logLeftY + stepY); | ||||
qreal rightY = qPow(m_logBaseY, m_logRightY + stepY); | ||||
qreal minY = leftY < rightY ? leftY : rightY; | ||||
qreal maxY = leftY > rightY ? leftY : rightY; | ||||
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r2275 | |||
setRange(minX, maxX, minY, maxY); | ||||
} | ||||
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r2356 | QPointF LogXLogYDomain::calculateGeometryPoint(const QPointF &point, bool &ok) const | ||
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r2275 | { | ||
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r2356 | if (point.x() > 0 && point.y() > 0) { | ||
const qreal deltaX = m_size.width() / qAbs(m_logRightX - m_logLeftX); | ||||
const qreal deltaY = m_size.height() / qAbs(m_logRightY - m_logLeftY); | ||||
qreal x = (log10(point.x()) / log10(m_logBaseX)) * deltaX - m_logLeftX * deltaX; | ||||
qreal y = (log10(point.y()) / log10(m_logBaseY)) * -deltaY - m_logLeftY * -deltaY + m_size.height(); | ||||
ok = true; | ||||
return QPointF(x, y); | ||||
} else { | ||||
qWarning() << "Logarithm of negative value is undefined. Empty layout returned"; | ||||
ok = false; | ||||
return QPointF(); | ||||
} | ||||
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r2275 | } | ||
QVector<QPointF> LogXLogYDomain::calculateGeometryPoints(const QList<QPointF>& vector) const | ||||
{ | ||||
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r2351 | const qreal deltaX = m_size.width() / qAbs(m_logRightX - m_logLeftX); | ||
const qreal deltaY = m_size.height() / qAbs(m_logRightY - m_logLeftY); | ||||
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r2275 | |||
QVector<QPointF> result; | ||||
result.resize(vector.count()); | ||||
for (int i = 0; i < vector.count(); ++i) { | ||||
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r2356 | if (vector[i].x() > 0 && vector[i].y() > 0) { | ||
qreal x = (log10(vector[i].x()) / log10(m_logBaseX)) * deltaX - m_logLeftX * deltaX; | ||||
qreal y = (log10(vector[i].y()) / log10(m_logBaseY)) * -deltaY - m_logLeftY * -deltaY + m_size.height(); | ||||
result[i].setX(x); | ||||
result[i].setY(y); | ||||
} else { | ||||
qWarning() << "Logarithm of negative value is undefined. Empty layout returned"; | ||||
return QVector<QPointF>(); | ||||
} | ||||
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r2275 | } | ||
return result; | ||||
} | ||||
QPointF LogXLogYDomain::calculateDomainPoint(const QPointF &point) const | ||||
{ | ||||
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r2351 | const qreal deltaX = m_size.width() / qAbs(m_logRightX - m_logLeftX); | ||
const qreal deltaY = m_size.height() / qAbs(m_logRightY - m_logLeftY); | ||||
qreal x = qPow(m_logBaseX, m_logLeftX + point.x() / deltaX); | ||||
qreal y = qPow(m_logBaseY, m_logLeftY + (m_size.height() - point.y()) / deltaY); | ||||
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r2275 | return QPointF(x, y); | ||
} | ||||
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r2290 | bool LogXLogYDomain::attachAxis(QAbstractAxis* axis) | ||
{ | ||||
AbstractDomain::attachAxis(axis); | ||||
QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis); | ||||
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r2295 | if(logAxis && logAxis->orientation()==Qt::Vertical) { | ||
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r2290 | QObject::connect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleVerticalAxisBaseChanged(qreal))); | ||
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r2295 | handleVerticalAxisBaseChanged(logAxis->base()); | ||
} | ||||
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r2290 | |||
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r2295 | if(logAxis && logAxis->orientation()==Qt::Horizontal) { | ||
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r2290 | QObject::connect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleHorizontalAxisBaseChanged(qreal))); | ||
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r2295 | handleHorizontalAxisBaseChanged(logAxis->base()); | ||
} | ||||
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r2290 | |||
return true; | ||||
} | ||||
bool LogXLogYDomain::detachAxis(QAbstractAxis* axis) | ||||
{ | ||||
AbstractDomain::detachAxis(axis); | ||||
QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis); | ||||
if(logAxis && logAxis->orientation()==Qt::Vertical) | ||||
QObject::disconnect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleVerticalAxisBaseChanged(qreal))); | ||||
if(logAxis && logAxis->orientation()==Qt::Horizontal) | ||||
QObject::disconnect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleHorizontalAxisBaseChanged(qreal))); | ||||
return true; | ||||
} | ||||
void LogXLogYDomain::handleVerticalAxisBaseChanged(qreal baseY) | ||||
{ | ||||
m_logBaseY = baseY; | ||||
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r2351 | qreal logMinY = log10(m_minY) / log10(m_logBaseY); | ||
qreal logMaxY = log10(m_maxY) / log10(m_logBaseY); | ||||
m_logLeftY = logMinY < logMaxY ? logMinY : logMaxY; | ||||
m_logRightY = logMinY > logMaxY ? logMinY : logMaxY; | ||||
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r2322 | emit updated(); | ||
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r2290 | } | ||
void LogXLogYDomain::handleHorizontalAxisBaseChanged(qreal baseX) | ||||
{ | ||||
m_logBaseX = baseX; | ||||
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r2351 | 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; | ||||
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r2322 | emit updated(); | ||
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r2290 | } | ||
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r2275 | // operators | ||
bool QTCOMMERCIALCHART_AUTOTEST_EXPORT operator== (const LogXLogYDomain &domain1, const LogXLogYDomain &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 QTCOMMERCIALCHART_AUTOTEST_EXPORT operator!= (const LogXLogYDomain &domain1, const LogXLogYDomain &domain2) | ||||
{ | ||||
return !(domain1 == domain2); | ||||
} | ||||
QDebug QTCOMMERCIALCHART_AUTOTEST_EXPORT operator<<(QDebug dbg, const LogXLogYDomain &domain) | ||||
{ | ||||
dbg.nospace() << "AbstractDomain(" << domain.m_minX << ',' << domain.m_maxX << ',' << domain.m_minY << ',' << domain.m_maxY << ')' << domain.m_size; | ||||
return dbg.maybeSpace(); | ||||
} | ||||
#include "moc_logxlogydomain_p.cpp" | ||||
QTCOMMERCIALCHART_END_NAMESPACE | ||||