qlogvalueaxis.cpp
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r0 | /**************************************************************************** | ||
** | ||||
** Copyright (C) 2016 The Qt Company Ltd. | ||||
** Contact: https://www.qt.io/licensing/ | ||||
** | ||||
** This file is part of the Qt Charts module of the Qt Toolkit. | ||||
** | ||||
** $QT_BEGIN_LICENSE:GPL$ | ||||
** Commercial License Usage | ||||
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** Software or, alternatively, in accordance with the terms contained in | ||||
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** information use the contact form at https://www.qt.io/contact-us. | ||||
** | ||||
** GNU General Public License Usage | ||||
** Alternatively, this file may be used under the terms of the GNU | ||||
** General Public License version 3 or (at your option) any later version | ||||
** approved by the KDE Free Qt Foundation. The licenses are as published by | ||||
** the Free Software Foundation and appearing in the file LICENSE.GPL3 | ||||
** included in the packaging of this file. Please review the following | ||||
** information to ensure the GNU General Public License requirements will | ||||
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** $QT_END_LICENSE$ | ||||
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****************************************************************************/ | ||||
#include <QtCharts/QLogValueAxis> | ||||
#include <private/qlogvalueaxis_p.h> | ||||
#include <private/chartlogvalueaxisx_p.h> | ||||
#include <private/chartlogvalueaxisy_p.h> | ||||
#include <private/polarchartlogvalueaxisangular_p.h> | ||||
#include <private/polarchartlogvalueaxisradial_p.h> | ||||
#include <private/abstractdomain_p.h> | ||||
#include <float.h> | ||||
#include <cmath> | ||||
QT_CHARTS_BEGIN_NAMESPACE | ||||
/*! | ||||
\class QLogValueAxis | ||||
\inmodule Qt Charts | ||||
\brief The QLogValueAxis class is used for manipulating chart's axis. | ||||
\note If a QLogValueAxis is attached to a series with one or more points with | ||||
negative or zero values on the associated dimension, the series will not be | ||||
plotted at all. This is particularly relevant when XYModelMappers are used, | ||||
since empty cells in models typically contain zero values. | ||||
*/ | ||||
/*! | ||||
\qmltype LogValueAxis | ||||
\instantiates QLogValueAxis | ||||
\inqmlmodule QtCharts | ||||
\brief The LogValueAxis element is used for manipulating chart's axes. | ||||
\inherits AbstractAxis | ||||
\note If a LogValueAxis is attached to a series with one or more points with | ||||
negative or zero values on the associated dimension, the series will not be | ||||
plotted at all. This is particularly relevant when XYModelMappers are used, | ||||
since empty cells in models typically contain zero values. | ||||
*/ | ||||
/*! | ||||
\property QLogValueAxis::min | ||||
Defines the minimum value on the axis. | ||||
When setting this property the max is adjusted if necessary, to ensure that the range remains valid. | ||||
Value has to be greater than 0. | ||||
*/ | ||||
/*! | ||||
\qmlproperty real LogValueAxis::min | ||||
Defines the minimum value on the axis. | ||||
When setting this property the max is adjusted if necessary, to ensure that the range remains valid. | ||||
Value has to be greater than 0. | ||||
*/ | ||||
/*! | ||||
\property QLogValueAxis::max | ||||
Defines the maximum value on the axis. | ||||
When setting this property the min is adjusted if necessary, to ensure that the range remains valid. | ||||
Value has to be greater than 0. | ||||
*/ | ||||
/*! | ||||
\qmlproperty real LogValueAxis::max | ||||
Defines the maximum value on the axis. | ||||
When setting this property the min is adjusted if necessary, to ensure that the range remains valid. | ||||
Value has to be greater than 0. | ||||
*/ | ||||
/*! | ||||
\property QLogValueAxis::base | ||||
Defines the base of the logarithm. | ||||
Value has to be greater than 0 and not equal 1 | ||||
*/ | ||||
/*! | ||||
\qmlproperty real LogValueAxis::base | ||||
Defines the maximum value on the axis. | ||||
Defines the base of the logarithm. | ||||
Value has to be greater than 0 and not equal 1 | ||||
*/ | ||||
/*! | ||||
\property QLogValueAxis::labelFormat | ||||
Defines the label format of the axis. | ||||
Supported specifiers are: d, i, o, x, X, f, F, e, E, g, G, c | ||||
See QString::sprintf() for additional details. | ||||
*/ | ||||
/*! | ||||
\qmlproperty real LogValueAxis::labelFormat | ||||
Defines the label format of the axis. | ||||
Supported specifiers are: d, i, o, x, X, f, F, e, E, g, G, c | ||||
See QString::sprintf() for additional details. | ||||
*/ | ||||
/*! | ||||
\fn void QLogValueAxis::minChanged(qreal min) | ||||
Axis emits signal when \a min of axis has changed. | ||||
*/ | ||||
/*! | ||||
\qmlsignal LogValueAxis::onMinChanged(qreal min) | ||||
Axis emits signal when \a min of axis has changed. | ||||
*/ | ||||
/*! | ||||
\fn void QLogValueAxis::maxChanged(qreal max) | ||||
Axis emits signal when \a max of axis has changed. | ||||
*/ | ||||
/*! | ||||
\qmlsignal LogValueAxis::onMaxChanged(qreal max) | ||||
Axis emits signal when \a max of axis has changed. | ||||
*/ | ||||
/*! | ||||
\fn void QLogValueAxis::rangeChanged(qreal min, qreal max) | ||||
Axis emits signal when \a min or \a max of axis has changed. | ||||
*/ | ||||
/*! | ||||
\fn void QLogValueAxis::labelFormatChanged(const QString &format) | ||||
Axis emits signal when \a format of axis labels has changed. | ||||
*/ | ||||
/*! | ||||
\qmlsignal LogValueAxis::labelFormatChanged(const QString &format) | ||||
Axis emits signal when \a format of axis labels has changed. | ||||
*/ | ||||
/*! | ||||
\fn void QLogValueAxis::baseChanged(qreal base) | ||||
Axis emits signal when \a base of logarithm of the axis has changed. | ||||
*/ | ||||
/*! | ||||
\qmlsignal LogValueAxis::baseChanged(qreal base) | ||||
Axis emits signal when \a base of logarithm of the axis has changed. | ||||
*/ | ||||
/*! | ||||
Constructs an axis object which is a child of \a parent. | ||||
*/ | ||||
QLogValueAxis::QLogValueAxis(QObject *parent) : | ||||
QAbstractAxis(*new QLogValueAxisPrivate(this), parent) | ||||
{ | ||||
} | ||||
/*! | ||||
\internal | ||||
*/ | ||||
QLogValueAxis::QLogValueAxis(QLogValueAxisPrivate &d, QObject *parent) : QAbstractAxis(d, parent) | ||||
{ | ||||
} | ||||
/*! | ||||
Destroys the object | ||||
*/ | ||||
QLogValueAxis::~QLogValueAxis() | ||||
{ | ||||
Q_D(QLogValueAxis); | ||||
if (d->m_chart) | ||||
d->m_chart->removeAxis(this); | ||||
} | ||||
void QLogValueAxis::setMin(qreal min) | ||||
{ | ||||
Q_D(QLogValueAxis); | ||||
setRange(min, qMax(d->m_max, min)); | ||||
} | ||||
qreal QLogValueAxis::min() const | ||||
{ | ||||
Q_D(const QLogValueAxis); | ||||
return d->m_min; | ||||
} | ||||
void QLogValueAxis::setMax(qreal max) | ||||
{ | ||||
Q_D(QLogValueAxis); | ||||
setRange(qMin(d->m_min, max), max); | ||||
} | ||||
qreal QLogValueAxis::max() const | ||||
{ | ||||
Q_D(const QLogValueAxis); | ||||
return d->m_max; | ||||
} | ||||
/*! | ||||
Sets range from \a min to \a max on the axis. | ||||
If min is greater than max then this function returns without making any changes. | ||||
*/ | ||||
void QLogValueAxis::setRange(qreal min, qreal max) | ||||
{ | ||||
Q_D(QLogValueAxis); | ||||
bool changed = false; | ||||
if (min > max) | ||||
return; | ||||
if (min > 0) { | ||||
if (!qFuzzyCompare(d->m_min, min)) { | ||||
d->m_min = min; | ||||
changed = true; | ||||
emit minChanged(min); | ||||
} | ||||
if (!qFuzzyCompare(d->m_max, max)) { | ||||
d->m_max = max; | ||||
changed = true; | ||||
emit maxChanged(max); | ||||
} | ||||
if (changed) { | ||||
emit rangeChanged(min, max); | ||||
emit d->rangeChanged(min,max); | ||||
} | ||||
} | ||||
} | ||||
void QLogValueAxis::setLabelFormat(const QString &format) | ||||
{ | ||||
Q_D(QLogValueAxis); | ||||
d->m_format = format; | ||||
emit labelFormatChanged(format); | ||||
} | ||||
QString QLogValueAxis::labelFormat() const | ||||
{ | ||||
Q_D(const QLogValueAxis); | ||||
return d->m_format; | ||||
} | ||||
void QLogValueAxis::setBase(qreal base) | ||||
{ | ||||
// check if base is correct | ||||
if (qFuzzyCompare(base, 1)) | ||||
return; | ||||
if (base > 0) { | ||||
Q_D(QLogValueAxis); | ||||
d->m_base = base; | ||||
emit baseChanged(base); | ||||
} | ||||
} | ||||
qreal QLogValueAxis::base() const | ||||
{ | ||||
Q_D(const QLogValueAxis); | ||||
return d->m_base; | ||||
} | ||||
/*! | ||||
Returns the type of the axis | ||||
*/ | ||||
QAbstractAxis::AxisType QLogValueAxis::type() const | ||||
{ | ||||
return AxisTypeLogValue; | ||||
} | ||||
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// | ||||
QLogValueAxisPrivate::QLogValueAxisPrivate(QLogValueAxis *q) | ||||
: QAbstractAxisPrivate(q), | ||||
m_min(1), | ||||
m_max(1), | ||||
m_base(10), | ||||
m_format(QString::null) | ||||
{ | ||||
} | ||||
QLogValueAxisPrivate::~QLogValueAxisPrivate() | ||||
{ | ||||
} | ||||
void QLogValueAxisPrivate::setMin(const QVariant &min) | ||||
{ | ||||
Q_Q(QLogValueAxis); | ||||
bool ok; | ||||
qreal value = min.toReal(&ok); | ||||
if (ok) | ||||
q->setMin(value); | ||||
} | ||||
void QLogValueAxisPrivate::setMax(const QVariant &max) | ||||
{ | ||||
Q_Q(QLogValueAxis); | ||||
bool ok; | ||||
qreal value = max.toReal(&ok); | ||||
if (ok) | ||||
q->setMax(value); | ||||
} | ||||
void QLogValueAxisPrivate::setRange(const QVariant &min, const QVariant &max) | ||||
{ | ||||
Q_Q(QLogValueAxis); | ||||
bool ok1; | ||||
bool ok2; | ||||
qreal value1 = min.toReal(&ok1); | ||||
qreal value2 = max.toReal(&ok2); | ||||
if (ok1 && ok2) | ||||
q->setRange(value1, value2); | ||||
} | ||||
void QLogValueAxisPrivate::setRange(qreal min, qreal max) | ||||
{ | ||||
Q_Q(QLogValueAxis); | ||||
bool changed = false; | ||||
if (min > max) | ||||
return; | ||||
if (min > 0) { | ||||
if (!qFuzzyCompare(m_min, min)) { | ||||
m_min = min; | ||||
changed = true; | ||||
emit q->minChanged(min); | ||||
} | ||||
if (!qFuzzyCompare(m_max, max)) { | ||||
m_max = max; | ||||
changed = true; | ||||
emit q->maxChanged(max); | ||||
} | ||||
if (changed) { | ||||
emit rangeChanged(min,max); | ||||
emit q->rangeChanged(min, max); | ||||
} | ||||
} | ||||
} | ||||
void QLogValueAxisPrivate::initializeGraphics(QGraphicsItem *parent) | ||||
{ | ||||
Q_Q(QLogValueAxis); | ||||
ChartAxisElement *axis(0); | ||||
if (m_chart->chartType() == QChart::ChartTypeCartesian) { | ||||
if (orientation() == Qt::Vertical) | ||||
axis = new ChartLogValueAxisY(q,parent); | ||||
if (orientation() == Qt::Horizontal) | ||||
axis = new ChartLogValueAxisX(q,parent); | ||||
} | ||||
if (m_chart->chartType() == QChart::ChartTypePolar) { | ||||
if (orientation() == Qt::Vertical) | ||||
axis = new PolarChartLogValueAxisRadial(q, parent); | ||||
if (orientation() == Qt::Horizontal) | ||||
axis = new PolarChartLogValueAxisAngular(q, parent); | ||||
} | ||||
m_item.reset(axis); | ||||
QAbstractAxisPrivate::initializeGraphics(parent); | ||||
} | ||||
void QLogValueAxisPrivate::initializeDomain(AbstractDomain *domain) | ||||
{ | ||||
if (orientation() == Qt::Vertical) { | ||||
if (!qFuzzyCompare(m_max, m_min)) { | ||||
domain->setRangeY(m_min, m_max); | ||||
} else if ( domain->minY() > 0) { | ||||
setRange(domain->minY(), domain->maxY()); | ||||
} else if (domain->maxY() > 0) { | ||||
domain->setRangeY(m_min, domain->maxY()); | ||||
} else { | ||||
domain->setRangeY(1, 10); | ||||
} | ||||
} | ||||
if (orientation() == Qt::Horizontal) { | ||||
if (!qFuzzyCompare(m_max, m_min)) { | ||||
domain->setRangeX(m_min, m_max); | ||||
} else if (domain->minX() > 0){ | ||||
setRange(domain->minX(), domain->maxX()); | ||||
} else if (domain->maxX() > 0) { | ||||
domain->setRangeX(m_min, domain->maxX()); | ||||
} else { | ||||
domain->setRangeX(1, 10); | ||||
} | ||||
} | ||||
} | ||||
#include "moc_qlogvalueaxis.cpp" | ||||
#include "moc_qlogvalueaxis_p.cpp" | ||||
QT_CHARTS_END_NAMESPACE | ||||