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Log domains update when axis base changes. LogAxis fix for labelFormat
Log domains update when axis base changes. LogAxis fix for labelFormat

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logxlogydomain.cpp
225 lines | 7.9 KiB | text/x-c | CppLexer
/****************************************************************************
**
** 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"
#include "qlogvalueaxis.h"
#include <qmath.h>
QTCOMMERCIALCHART_BEGIN_NAMESPACE
LogXLogYDomain::LogXLogYDomain(QObject *parent)
: AbstractDomain(parent),
m_logMinX(0),
m_logMaxX(1),
m_logBaseX(10),
m_logMinY(0),
m_logMaxY(1),
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;
m_logMinX = log10(m_minX) / log10(m_logBaseX);
m_logMaxX = log10(m_maxX) / log10(m_logBaseX);
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;
m_logMinY = log10(m_minY) / log10(m_logBaseY);
m_logMaxY = log10(m_maxY) / log10(m_logBaseY);
if(!m_signalsBlocked)
emit rangeVerticalChanged(m_minY, m_maxY);
}
if (axisXChanged || axisYChanged)
emit updated();
}
void LogXLogYDomain::zoomIn(const QRectF &rect)
{
qreal newLogMinX = rect.left() * (m_logMaxX - m_logMinX) / m_size.width() + m_logMinX;
qreal newLogMaxX = rect.right() * (m_logMaxX - m_logMinX) / m_size.width() + m_logMinX;
qreal minX = qPow(m_logBaseX, newLogMinX);
qreal maxX = qPow(m_logBaseX, newLogMaxX);
qreal newLogMinY = m_logMaxY - rect.bottom() * (m_logMaxY - m_logMinY) / m_size.height();
qreal newLogMaxY = m_logMaxY - rect.top() * (m_logMaxY - m_logMinY) / m_size.height();
qreal minY = qPow(m_logBaseY, newLogMinY);
qreal maxY = qPow(m_logBaseY, newLogMaxY);
setRange(minX, maxX, minY, maxY);
}
void LogXLogYDomain::zoomOut(const QRectF &rect)
{
qreal ratioX = m_size.width()/rect.width();
qreal newLogMinX = m_logMinX - (m_logMaxX - m_logMinX) / ratioX;
qreal newLogMaxX = m_logMaxX + (m_logMaxX - m_logMinX) / ratioX;
qreal minX = qPow(m_logBaseX, newLogMinX);
qreal maxX = qPow(m_logBaseX, newLogMaxX);
qreal ratioY = m_size.height()/rect.height();
qreal newLogMinY = m_logMaxY - (m_logMaxY - m_logMinY) / ratioY;
qreal newLogMaxY = m_logMaxY + (m_logMaxY - m_logMinY) / ratioY;
qreal minY = qPow(m_logBaseY, newLogMinY);
qreal maxY = qPow(m_logBaseY, newLogMaxY);
setRange(minX, maxX, minY, maxY);
}
void LogXLogYDomain::move(qreal dx, qreal dy)
{
qreal stepX = dx * qAbs(m_logMaxX - m_logMinX) / m_size.width();
qreal minX = qPow(m_logBaseX, m_logMinX + stepX);
qreal maxX = qPow(m_logBaseX, m_logMaxX + stepX);
qreal stepY = dy * qAbs(m_logMaxY - m_logMinY) / m_size.height();
qreal minY = qPow(m_logBaseY, m_logMinY + stepY);
qreal maxY = qPow(m_logBaseY, m_logMaxY + stepY);
setRange(minX, maxX, minY, maxY);
}
QPointF LogXLogYDomain::calculateGeometryPoint(const QPointF &point) const
{
const qreal leftEdgeX= m_logMinX < m_logMaxX ? m_logMinX : m_logMaxX;
const qreal leftEdgeY = m_logMinY < m_logMaxY ? m_logMinY : m_logMaxY;
const qreal deltaX = m_size.width() / qAbs(m_logMaxX - m_logMinX);
const qreal deltaY = m_size.height() / qAbs(m_logMaxY - m_logMinY);
qreal x = (log10(point.x()) / log10(m_logBaseX)) * deltaX - leftEdgeX * deltaX;
qreal y = (log10(point.y()) / log10(m_logBaseY)) * -deltaY - leftEdgeY * -deltaY + m_size.height();
return QPointF(x, y);
}
QVector<QPointF> LogXLogYDomain::calculateGeometryPoints(const QList<QPointF>& vector) const
{
const qreal leftEdgeX= m_logMinX < m_logMaxX ? m_logMinX : m_logMaxX;
const qreal leftEdgeY = m_logMinY < m_logMaxY ? m_logMinY : m_logMaxY;
const qreal deltaX = m_size.width() / qAbs(m_logMaxX - m_logMinX);
const qreal deltaY = m_size.height() / qAbs(m_logMaxY - m_logMinY);
QVector<QPointF> result;
result.resize(vector.count());
for (int i = 0; i < vector.count(); ++i) {
qreal x = (log10(vector[i].x()) / log10(m_logBaseX)) * deltaX - leftEdgeX * deltaX;
qreal y = (log10(vector[i].y()) / log10(m_logBaseY)) * -deltaY - leftEdgeY * -deltaY + m_size.height();
result[i].setX(x);
result[i].setY(y);
}
return result;
}
QPointF LogXLogYDomain::calculateDomainPoint(const QPointF &point) const
{
const qreal leftEdgeX= m_logMinX < m_logMaxX ? m_logMinX : m_logMaxX;
const qreal leftEdgeY = m_logMinY < m_logMaxY ? m_logMinY : m_logMaxY;
const qreal deltaX = m_size.width() / qAbs(m_logMaxX - m_logMinX);
const qreal deltaY = m_size.height() / qAbs(m_logMaxY - m_logMinY);
qreal x = qPow(m_logBaseX, leftEdgeX + point.x() / deltaX);
qreal y = qPow(m_logBaseY, leftEdgeY + (m_size.height() - point.y()) / deltaY);
return QPointF(x, y);
}
bool LogXLogYDomain::attachAxis(QAbstractAxis* axis)
{
AbstractDomain::attachAxis(axis);
QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis);
if(logAxis && logAxis->orientation()==Qt::Vertical)
QObject::connect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleVerticalAxisBaseChanged(qreal)));
if(logAxis && logAxis->orientation()==Qt::Horizontal)
QObject::connect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleHorizontalAxisBaseChanged(qreal)));
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;
m_logMinY = log10(m_minY) / log10(m_logBaseY);
m_logMaxY = log10(m_maxY) / log10(m_logBaseY);
}
void LogXLogYDomain::handleHorizontalAxisBaseChanged(qreal baseX)
{
m_logBaseX = baseX;
m_logMinX = log10(m_minX) / log10(m_logBaseX);
m_logMaxX = log10(m_maxX) / log10(m_logBaseX);
}
// 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