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/****************************************************************************
**
** 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 "abstractdomain_p.h"
#include "qabstractaxis_p.h"
#include <qmath.h>
QTCOMMERCIALCHART_BEGIN_NAMESPACE
AbstractDomain::AbstractDomain(QObject *parent)
: QObject(parent),
m_minX(0),
m_maxX(0),
m_minY(0),
m_maxY(0),
m_axisSignalsBlocked(false)
{
}
AbstractDomain::~AbstractDomain()
{
}
void AbstractDomain::setSize(const QSizeF& size)
{
if(m_size!=size)
{
m_size=size;
emit updated();
}
}
QSizeF AbstractDomain::size() const
{
return m_size;
}
void AbstractDomain::setRangeX(qreal min, qreal max)
{
setRange(min, max, m_minY, m_maxY);
}
void AbstractDomain::setRangeY(qreal min, qreal max)
{
setRange(m_minX, m_maxX, min, max);
}
void AbstractDomain::setMinX(qreal min)
{
setRange(min, m_maxX, m_minY, m_maxY);
}
void AbstractDomain::setMaxX(qreal max)
{
setRange(m_minX, max, m_minY, m_maxY);
}
void AbstractDomain::setMinY(qreal min)
{
setRange(m_minX, m_maxX, min, m_maxY);
}
void AbstractDomain::setMaxY(qreal max)
{
setRange(m_minX, m_maxX, m_minY, max);
}
qreal AbstractDomain::spanX() const
{
Q_ASSERT(m_maxX >= m_minX);
return m_maxX - m_minX;
}
qreal AbstractDomain::spanY() const
{
Q_ASSERT(m_maxY >= m_minY);
return m_maxY - m_minY;
}
bool AbstractDomain::isEmpty() const
{
return qFuzzyIsNull(spanX()) || qFuzzyIsNull(spanY()) || m_size.isEmpty() ;
}
QPointF AbstractDomain::calculateDomainPoint(const QPointF &point) const
{
const qreal deltaX = m_size.width() / (m_maxX - m_minX);
const qreal deltaY = m_size.height() / (m_maxY - m_minY);
qreal x = point.x() / deltaX + m_minX;
qreal y = (point.y() - m_size.height()) / (-deltaY) + m_minY;
return QPointF(x, y);
}
// handlers
void AbstractDomain::handleVerticalAxisRangeChanged(qreal min, qreal max)
{
if(!m_axisSignalsBlocked)
setRangeY(min, max);
}
void AbstractDomain::handleHorizontalAxisRangeChanged(qreal min, qreal max)
{
if(!m_axisSignalsBlocked)
setRangeX(min, max);
}
void AbstractDomain::blockAxisSignals(bool block)
{
m_axisSignalsBlocked=block;
}
//algorithm defined by Paul S.Heckbert GraphicalGems I
void AbstractDomain::looseNiceNumbers(qreal &min, qreal &max, int &ticksCount)
{
qreal range = niceNumber(max - min, true); //range with ceiling
qreal step = niceNumber(range / (ticksCount - 1), false);
min = qFloor(min / step);
max = qCeil(max / step);
ticksCount = int(max - min) + 1;
min *= step;
max *= step;
}
//nice numbers can be expressed as form of 1*10^n, 2* 10^n or 5*10^n
qreal AbstractDomain::niceNumber(qreal x, bool ceiling)
{
qreal z = qPow(10, qFloor(log10(x))); //find corresponding number of the form of 10^n than is smaller than x
qreal q = x / z; //q<10 && q>=1;
if (ceiling) {
if (q <= 1.0) q = 1;
else if (q <= 2.0) q = 2;
else if (q <= 5.0) q = 5;
else q = 10;
} else {
if (q < 1.5) q = 1;
else if (q < 3.0) q = 2;
else if (q < 7.0) q = 5;
else q = 10;
}
return q * z;
}
// operators
bool QTCOMMERCIALCHART_AUTOTEST_EXPORT operator== (const AbstractDomain &domain1, const AbstractDomain &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 AbstractDomain &domain1, const AbstractDomain &domain2)
{
return !(domain1 == domain2);
}
QDebug QTCOMMERCIALCHART_AUTOTEST_EXPORT operator<<(QDebug dbg, const AbstractDomain &domain)
{
dbg.nospace() << "AbstractDomain(" << domain.m_minX << ',' << domain.m_maxX << ',' << domain.m_minY << ',' << domain.m_maxY << ')' << domain.m_size;
return dbg.maybeSpace();
}
#include "moc_abstractdomain_p.cpp"
QTCOMMERCIALCHART_END_NAMESPACE
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