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README release update...
README release update README file updated for Charts 1.3.1 release. Change-Id: Ib7e4b67421db9547718844fc4ed7414120b195a7 Reviewed-by: Miikka Heikkinen <miikka.heikkinen@digia.com>
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logxypolardomain.cpp
242 lines | 7.1 KiB | text/x-c | CppLexer
/ src / domain / logxypolardomain.cpp
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Miikka Heikkinen
Add Polar chart support...
 r2483 /****************************************************************************
**
** Copyright (C) 2013 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.digia.com
**
Miikka Heikkinen
Qt Commercial -> Qt Enterprise...
 r2574 ** This file is part of the Qt Enterprise Charts Add-on.
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 r2483 **
** $QT_BEGIN_LICENSE$
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Qt Commercial -> Qt Enterprise...
 r2574 ** Licensees holding valid Qt Enterprise licenses may use this file in
** accordance with the Qt Enterprise License Agreement provided with the
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Add Polar chart support...
 r2483 ** 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>
QTCOMMERCIALCHART_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)
{
Miikka Heikkinen
Added QChart::zoomReset() and QChart::isZoomed()...
 r2545 storeZoomReset();
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 r2483 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)
{
Miikka Heikkinen
Added QChart::zoomReset() and QChart::isZoomed()...
 r2545 storeZoomReset();
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 r2483 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 QTCOMMERCIALCHART_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 QTCOMMERCIALCHART_AUTOTEST_EXPORT operator!= (const LogXYPolarDomain &domain1, const LogXYPolarDomain &domain2)
{
return !(domain1 == domain2);
}
QDebug QTCOMMERCIALCHART_AUTOTEST_EXPORT operator<<(QDebug dbg, const LogXYPolarDomain &domain)
{
Titta Heikkala
Fix Chart build when QT_NO_TEXTSTREAM is defined...
 r2620 #ifdef QT_NO_TEXTSTREAM
Q_UNUSED(domain)
#else
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 r2483 dbg.nospace() << "AbstractDomain(" << domain.m_minX << ',' << domain.m_maxX << ',' << domain.m_minY << ',' << domain.m_maxY << ')' << domain.m_size;
Titta Heikkala
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 r2620 #endif
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 r2483 return dbg.maybeSpace();
}
#include "moc_logxypolardomain_p.cpp"
QTCOMMERCIALCHART_END_NAMESPACE