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Updated logarithmc axis example screen shot
Updated logarithmc axis example screen shot
Marek Rosa - - Load All Authors

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logxlogydomain.cpp
258 lines | 9.3 KiB | text/x-c | CppLexer
/ src / domain / logxlogydomain.cpp
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Marek Rosa
Domains added
 r2275 /****************************************************************************
**
** Copyright (C) 2012 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 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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 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;
if (!qFuzzyIsNull(m_minX - minX) || !qFuzzyIsNull(m_maxX - maxX)) {
m_minX = minX;
m_maxX = maxX;
axisXChanged = true;
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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;
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Fix domain switching
 r2288 if(!m_signalsBlocked)
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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;
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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;
Michal Klocek
Fix domain switching
 r2288 if(!m_signalsBlocked)
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Negative values with log axis handled
 r2356 emit rangeVerticalChanged(m_minY, m_maxY);
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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;
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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 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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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();
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Log domains zoomin, zoomout and move added
 r2280
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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)
{
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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;
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Domains added
 r2275
setRange(minX, maxX, minY, maxY);
}
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Negative values with log axis handled
 r2356 QPointF LogXLogYDomain::calculateGeometryPoint(const QPointF &point, bool &ok) const
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Domains added
 r2275 {
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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 {
qWarning() << "Logarithm of negative value is undefined. Empty layout returned";
ok = false;
return QPointF();
}
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Domains added
 r2275 }
QVector<QPointF> LogXLogYDomain::calculateGeometryPoints(const QList<QPointF>& vector) 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);
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 r2275
QVector<QPointF> result;
result.resize(vector.count());
for (int i = 0; i < vector.count(); ++i) {
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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 {
qWarning() << "Logarithm of negative value is undefined. Empty layout returned";
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);
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Domains added
 r2275 return QPointF(x, y);
}
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Added attach/dettach axis domain implementations
 r2290 bool LogXLogYDomain::attachAxis(QAbstractAxis* axis)
{
AbstractDomain::attachAxis(axis);
QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis);
Marek Rosa
Fix to domain initialization when log base was preset on axis before adding it to chart
 r2295 if(logAxis && logAxis->orientation()==Qt::Vertical) {
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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
Marek Rosa
Fix to domain initialization when log base was preset on axis before adding it to chart
 r2295 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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Added attach/dettach axis domain implementations
 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;
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)
{
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