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Optimize polar chart radius calculation a bit....
Optimize polar chart radius calculation a bit. Current algorithm still results in an occasional extra unneeded iteration, as it uses only crude approximation for radius reduction. However, any speedup gained by accurately calculating needed reduction would be very minor compared to approximations used, so it doesn't seem worth the effort to figure out the complex math. Change-Id: If670a1b058a85cd0305b93f62e6388b463bafd0d Reviewed-by: Tomi Korpipää <tomi.korpipaa@digia.com>
Miikka Heikkinen - - Load All Authors

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r2483:f494279b6366
r2542:189023d9a551
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logxlogydomain.cpp
261 lines | 9.4 KiB | text/x-c | CppLexer
/ src / domain / logxlogydomain.cpp
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Marek Rosa
Domains added
 r2275 /****************************************************************************
**
Miikka Heikkinen
Fixed the copyright year 2012 -> 2013
 r2432 ** Copyright (C) 2013 Digia Plc
Marek Rosa
Domains added
 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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QChart mapping functions: return QPoint(0, 0) if series type is Pie...
 r2351 m_logLeftX(0),
m_logRightX(1),
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Domains added
 r2275 m_logBaseX(10),
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QChart mapping functions: return QPoint(0, 0) if series type is Pie...
 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;
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 r2483 adjustLogDomainRanges(minX, maxX);
adjustLogDomainRanges(minY, maxY);
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Domains added
 r2275 if (!qFuzzyIsNull(m_minX - minX) || !qFuzzyIsNull(m_maxX - maxX)) {
m_minX = minX;
m_maxX = maxX;
axisXChanged = true;
Marek Rosa
QChart mapping functions: return QPoint(0, 0) if series type is Pie...
 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;
Michal Klocek
Fix domain switching
 r2288 if(!m_signalsBlocked)
Marek Rosa
Negative values with log axis handled
 r2356 emit rangeHorizontalChanged(m_minX, m_maxX);
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Domains added
 r2275 }
if (!qFuzzyIsNull(m_minY - minY) || !qFuzzyIsNull(m_maxY - maxY)) {
m_minY = minY;
m_maxY = maxY;
axisYChanged = true;
Marek Rosa
QChart mapping functions: return QPoint(0, 0) if series type is Pie...
 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;
Miikka Heikkinen
Add Polar chart support...
 r2483 if (!m_signalsBlocked)
Marek Rosa
Negative values with log axis handled
 r2356 emit rangeVerticalChanged(m_minY, m_maxY);
Marek Rosa
Domains added
 r2275 }
if (axisXChanged || axisYChanged)
emit updated();
}
void LogXLogYDomain::zoomIn(const QRectF &rect)
{
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QChart mapping functions: return QPoint(0, 0) if series type is Pie...
 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;
Marek Rosa
Domains added
 r2275
Marek Rosa
QChart mapping functions: return QPoint(0, 0) if series type is Pie...
 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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Domains added
 r2275
setRange(minX, maxX, minY, maxY);
}
void LogXLogYDomain::zoomOut(const QRectF &rect)
{
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QChart mapping functions: return QPoint(0, 0) if series type is Pie...
 r2351 const qreal factorX = m_size.width() / rect.width();
const qreal factorY = m_size.height() / rect.height();
Marek Rosa
Log domains zoomin, zoomout and move added
 r2280
Marek Rosa
QChart mapping functions: return QPoint(0, 0) if series type is Pie...
 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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Domains added
 r2275
setRange(minX, maxX, minY, maxY);
}
void LogXLogYDomain::move(qreal dx, qreal dy)
{
Marek Rosa
QChart mapping functions: return QPoint(0, 0) if series type is Pie...
 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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Domains added
 r2275
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QChart mapping functions: return QPoint(0, 0) if series type is Pie...
 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;
Marek Rosa
Domains added
 r2275
setRange(minX, maxX, minY, maxY);
}
Marek Rosa
Negative values with log axis handled
 r2356 QPointF LogXLogYDomain::calculateGeometryPoint(const QPointF &point, bool &ok) const
Marek Rosa
Domains added
 r2275 {
Marek Rosa
Negative values with log axis handled
 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 {
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Add Polar chart support...
 r2483 qWarning() << "Logarithm of negative value is undefined. Empty layout returned.";
Marek Rosa
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 r2356 ok = false;
return QPointF();
}
Marek Rosa
Domains added
 r2275 }
Miikka Heikkinen
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 r2483 QVector<QPointF> LogXLogYDomain::calculateGeometryPoints(const QList<QPointF> &vector) const
Marek Rosa
Domains added
 r2275 {
Marek Rosa
QChart mapping functions: return QPoint(0, 0) if series type is Pie...
 r2351 const qreal deltaX = m_size.width() / qAbs(m_logRightX - m_logLeftX);
const qreal deltaY = m_size.height() / qAbs(m_logRightY - m_logLeftY);
Marek Rosa
Domains added
 r2275
QVector<QPointF> result;
result.resize(vector.count());
for (int i = 0; i < vector.count(); ++i) {
Marek Rosa
Negative values with log axis handled
 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 {
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Add Polar chart support...
 r2483 qWarning() << "Logarithm of negative value is undefined. Empty layout returned.";
Marek Rosa
Negative values with log axis handled
 r2356 return QVector<QPointF>();
}
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Domains added
 r2275 }
return result;
}
QPointF LogXLogYDomain::calculateDomainPoint(const QPointF &point) const
{
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QChart mapping functions: return QPoint(0, 0) if series type is Pie...
 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);
Marek Rosa
Domains added
 r2275 return QPointF(x, y);
}
Miikka Heikkinen
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 r2483 bool LogXLogYDomain::attachAxis(QAbstractAxis *axis)
Marek Rosa
Added attach/dettach axis domain implementations
 r2290 {
AbstractDomain::attachAxis(axis);
QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis);
Miikka Heikkinen
Add Polar chart support...
 r2483 if (logAxis && logAxis->orientation() == Qt::Vertical) {
Marek Rosa
Added attach/dettach axis domain implementations
 r2290 QObject::connect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleVerticalAxisBaseChanged(qreal)));
Marek Rosa
Fix to domain initialization when log base was preset on axis before adding it to chart
 r2295 handleVerticalAxisBaseChanged(logAxis->base());
}
Marek Rosa
Added attach/dettach axis domain implementations
 r2290
Miikka Heikkinen
Add Polar chart support...
 r2483 if (logAxis && logAxis->orientation() == Qt::Horizontal) {
Marek Rosa
Added attach/dettach axis domain implementations
 r2290 QObject::connect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleHorizontalAxisBaseChanged(qreal)));
Marek Rosa
Fix to domain initialization when log base was preset on axis before adding it to chart
 r2295 handleHorizontalAxisBaseChanged(logAxis->base());
}
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 r2290
return true;
}
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 r2483 bool LogXLogYDomain::detachAxis(QAbstractAxis *axis)
Marek Rosa
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 r2290 {
AbstractDomain::detachAxis(axis);
QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis);
Miikka Heikkinen
Add Polar chart support...
 r2483 if (logAxis && logAxis->orientation() == Qt::Vertical)
Marek Rosa
Added attach/dettach axis domain implementations
 r2290 QObject::disconnect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleVerticalAxisBaseChanged(qreal)));
Miikka Heikkinen
Add Polar chart support...
 r2483 if (logAxis && logAxis->orientation() == Qt::Horizontal)
Marek Rosa
Added attach/dettach axis domain implementations
 r2290 QObject::disconnect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleHorizontalAxisBaseChanged(qreal)));
return true;
}
void LogXLogYDomain::handleVerticalAxisBaseChanged(qreal baseY)
{
m_logBaseY = baseY;
Marek Rosa
QChart mapping functions: return QPoint(0, 0) if series type is Pie...
 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;
Marek Rosa
Fixed: chart not redrawing when logaxis's logBase value changed
 r2322 emit updated();
Marek Rosa
Added attach/dettach axis domain implementations
 r2290 }
void LogXLogYDomain::handleHorizontalAxisBaseChanged(qreal baseX)
{
m_logBaseX = baseX;
Marek Rosa
QChart mapping functions: return QPoint(0, 0) if series type is Pie...
 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;
Marek Rosa
Fixed: chart not redrawing when logaxis's logBase value changed
 r2322 emit updated();
Marek Rosa
Added attach/dettach axis domain implementations
 r2290 }
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Domains added
 r2275 // operators
bool QTCOMMERCIALCHART_AUTOTEST_EXPORT operator== (const LogXLogYDomain &domain1, const LogXLogYDomain &domain2)
{
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 r2483 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));
Marek Rosa
Domains added
 r2275 }
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