qvaluesaxis.cpp
381 lines
| 8.7 KiB
| text/x-c
|
CppLexer
Michal Klocek
|
r1540 | /**************************************************************************** | ||
| ** | ||||
| ** 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 "qvaluesaxis.h" | ||||
| #include "qvaluesaxis_p.h" | ||||
Marek Rosa
|
r1561 | #include "chartvaluesaxisx_p.h" | ||
| #include "chartvaluesaxisy_p.h" | ||||
|
Michal Klocek
|
r1661 | #include "domain_p.h" | ||
|
Michal Klocek
|
r1725 | #include "chartdataset_p.h" | ||
| #include <qmath.h> | ||||
|
Michal Klocek
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r1540 | |||
| QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
|
Marek Rosa
|
r1547 | /*! | ||
| \class QValuesAxis | ||||
| \brief The QValuesAxis class is used for manipulating chart's axis. | ||||
| \mainclass | ||||
sauimone
|
r1639 | ValuesAxis can be setup to show axis line with tick marks, grid lines and shades. | ||
| Values of axis are drawn to position of ticks | ||||
|
Marek Rosa
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r1547 | */ | ||
| /*! | ||||
|
sauimone
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r1639 | \qmlclass ValuesAxis QValuesAxis | ||
| \brief The ValuesAxis element is used for manipulating chart's axes | ||||
|
Marek Rosa
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r1547 | |||
|
sauimone
|
r1639 | ValueAxis can be setup to show axis line with tick marks, grid lines and shades. | ||
| Values of axis are drawn to position of ticks | ||||
|
Marek Rosa
|
r1547 | |||
| To access Axes you can use ChartView API. For example: | ||||
| \code | ||||
| ChartView { | ||||
|
sauimone
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r1639 | ValuesAxis { | ||
| id: xAxis | ||||
| min: 0 | ||||
| max: 10 | ||||
| } | ||||
| // Add a few series... | ||||
|
Marek Rosa
|
r1547 | } | ||
| \endcode | ||||
| */ | ||||
| /*! | ||||
| \property QValuesAxis::min | ||||
| Defines the minimum value on the axis. | ||||
|
Marek Rosa
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r1730 | When setting this property the max is adjusted if necessary, to ensure that the range remains valid. | ||
|
Marek Rosa
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r1547 | */ | ||
| /*! | ||||
|
sauimone
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r1639 | \qmlproperty real ValuesAxis::min | ||
|
Marek Rosa
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r1547 | Defines the minimum value on the axis. | ||
|
Marek Rosa
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r1730 | When setting this property the max is adjusted if necessary, to ensure that the range remains valid. | ||
|
Marek Rosa
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r1547 | */ | ||
| /*! | ||||
| \property QValuesAxis::max | ||||
| Defines the maximum value on the axis. | ||||
|
Marek Rosa
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r1730 | When setting this property the min is adjusted if necessary, to ensure that the range remains valid. | ||
|
Marek Rosa
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r1547 | */ | ||
| /*! | ||||
|
sauimone
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r1639 | \qmlproperty real ValuesAxis::max | ||
|
Marek Rosa
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r1547 | Defines the maximum value on the axis. | ||
|
Marek Rosa
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r1730 | When setting this property the min is adjusted if necessary, to ensure that the range remains valid. | ||
|
Marek Rosa
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r1547 | */ | ||
| /*! | ||||
| \fn void QValuesAxis::minChanged(qreal min) | ||||
| Axis emits signal when \a min of axis has changed. | ||||
| */ | ||||
|
sauimone
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r1654 | /*! | ||
| \qmlsignal ValuesAxis::onMinChanged(real min) | ||||
| Axis emits signal when \a min of axis has changed. | ||||
| */ | ||||
|
Marek Rosa
|
r1547 | |||
| /*! | ||||
| \fn void QValuesAxis::maxChanged(qreal max) | ||||
| Axis emits signal when \a max of axis has changed. | ||||
| */ | ||||
|
sauimone
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r1654 | /*! | ||
| \qmlsignal ValuesAxis::onMaxChanged(real max) | ||||
| Axis emits signal when \a max of axis has changed. | ||||
| */ | ||||
|
Marek Rosa
|
r1547 | |||
| /*! | ||||
| \fn void QValuesAxis::rangeChanged(qreal min, qreal max) | ||||
| Axis emits signal when \a min or \a max of axis has changed. | ||||
| */ | ||||
|
Michal Klocek
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r1540 | |||
|
sauimone
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r1575 | /*! | ||
| \property QValuesAxis::ticksCount | ||||
| The number of tick marks for the axis. | ||||
| */ | ||||
| /*! | ||||
|
sauimone
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r1639 | \qmlproperty int ValuesAxis::ticksCount | ||
|
sauimone
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r1575 | The number of tick marks for the axis. | ||
| */ | ||||
| /*! | ||||
| \property QValuesAxis::niceNumbersEnabled | ||||
| Whether the nice numbers algorithm is enabled or not for the axis. | ||||
| */ | ||||
| /*! | ||||
|
sauimone
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r1639 | \qmlproperty bool ValuesAxis::niceNumbersEnabled | ||
|
sauimone
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r1575 | Whether the nice numbers algorithm is enabled or not for the axis. | ||
| */ | ||||
|
Marek Rosa
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r1636 | /*! | ||
| Constructs an axis object which is a child of \a parent. | ||||
| */ | ||||
|
Michal Klocek
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r1540 | QValuesAxis::QValuesAxis(QObject *parent) : | ||
| QAbstractAxis(*new QValuesAxisPrivate(this),parent) | ||||
| { | ||||
| } | ||||
|
Marek Rosa
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r1638 | /*! | ||
| \internal | ||||
| */ | ||||
|
Michal Klocek
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r1540 | QValuesAxis::QValuesAxis(QValuesAxisPrivate &d,QObject *parent) : QAbstractAxis(d,parent) | ||
| { | ||||
| } | ||||
|
Marek Rosa
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r1638 | /*! | ||
| Destroys the object | ||||
| */ | ||||
|
Michal Klocek
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r1540 | QValuesAxis::~QValuesAxis() | ||
| { | ||||
|
Michal Klocek
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r1725 | Q_D(QValuesAxis); | ||
| if(d->m_dataset) { | ||||
| d->m_dataset->removeAxis(this); | ||||
| } | ||||
|
Michal Klocek
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r1540 | } | ||
| void QValuesAxis::setMin(qreal min) | ||||
| { | ||||
| Q_D(QValuesAxis); | ||||
|
Marek Rosa
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r1728 | setRange(min, qMax(d->m_max, min)); | ||
|
Michal Klocek
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r1540 | } | ||
| qreal QValuesAxis::min() const | ||||
| { | ||||
| Q_D(const QValuesAxis); | ||||
| return d->m_min; | ||||
| } | ||||
| void QValuesAxis::setMax(qreal max) | ||||
| { | ||||
| Q_D(QValuesAxis); | ||||
|
Marek Rosa
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r1728 | setRange(qMin(d->m_min, max), max); | ||
|
Michal Klocek
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r1540 | } | ||
| qreal QValuesAxis::max() const | ||||
| { | ||||
| Q_D(const QValuesAxis); | ||||
| return d->m_max; | ||||
| } | ||||
| /*! | ||||
| Sets range from \a min to \a max on the axis. | ||||
|
Marek Rosa
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r1730 | If min is greater than max then this function returns without making any changes. | ||
|
Michal Klocek
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r1540 | */ | ||
| void QValuesAxis::setRange(qreal min, qreal max) | ||||
| { | ||||
|
Michal Klocek
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r1725 | if(max<min) return; | ||
|
Michal Klocek
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r1540 | Q_D(QValuesAxis); | ||
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sauimone
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r1578 | bool changed = false; | ||
|
Michal Klocek
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r1698 | |||
|
Marek Rosa
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r1728 | if (min > max) | ||
| return; | ||||
|
sauimone
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r1578 | if (!qFuzzyIsNull(d->m_min - min)) { | ||
| d->m_min = min; | ||||
| changed = true; | ||||
| emit minChanged(min); | ||||
| } | ||||
| if (!qFuzzyIsNull(d->m_max - max)) { | ||||
| d->m_max = max; | ||||
| changed = true; | ||||
| emit maxChanged(max); | ||||
| } | ||||
|
Michal Klocek
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r1698 | if(d->m_niceNumbers) d->looseNiceNumbers(d->m_min, d->m_max, d->m_tickCount); | ||
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sauimone
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r1578 | if (changed) { | ||
|
Michal Klocek
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r1593 | emit rangeChanged(d->m_min,d->m_max); | ||
|
Michal Klocek
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r1698 | d->emitUpdated(); | ||
|
sauimone
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r1578 | } | ||
|
Michal Klocek
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r1540 | } | ||
| /*! | ||||
| Sets \a count for ticks on the axis. | ||||
| */ | ||||
| void QValuesAxis::setTicksCount(int count) | ||||
| { | ||||
| Q_D(QValuesAxis); | ||||
|
Michal Klocek
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r1700 | if (d->m_tickCount != count && count >=2) { | ||
|
Michal Klocek
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r1698 | d->m_tickCount = count; | ||
| d->emitUpdated(); | ||||
|
Michal Klocek
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r1540 | } | ||
| } | ||||
| /*! | ||||
|
sauimone
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r1575 | \fn int QValuesAxis::ticksCount() const | ||
|
Michal Klocek
|
r1540 | Return number of ticks on the axis | ||
| */ | ||||
| int QValuesAxis::ticksCount() const | ||||
| { | ||||
| Q_D(const QValuesAxis); | ||||
|
Michal Klocek
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r1698 | return d->m_tickCount; | ||
|
Michal Klocek
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r1540 | } | ||
| void QValuesAxis::setNiceNumbersEnabled(bool enable) | ||||
| { | ||||
| Q_D(QValuesAxis); | ||||
| if (d->m_niceNumbers != enable){ | ||||
| d->m_niceNumbers = enable; | ||||
|
Michal Klocek
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r1700 | if(enable && !qFuzzyIsNull(d->m_max - d->m_min)) setRange(d->min(),d->max()); | ||
|
Michal Klocek
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r1540 | } | ||
| } | ||||
| bool QValuesAxis::niceNumbersEnabled() const | ||||
| { | ||||
| Q_D(const QValuesAxis); | ||||
| return d->m_niceNumbers; | ||||
| } | ||||
|
Marek Rosa
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r1637 | /*! | ||
| Returns the type of the axis | ||||
| */ | ||||
|
Michal Klocek
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r1540 | QAbstractAxis::AxisType QValuesAxis::type() const | ||
| { | ||||
| return AxisTypeValues; | ||||
| } | ||||
| ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// | ||||
| QValuesAxisPrivate::QValuesAxisPrivate(QValuesAxis* q): | ||||
| QAbstractAxisPrivate(q), | ||||
|
Michal Klocek
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r1698 | m_min(0), | ||
| m_max(0), | ||||
| m_tickCount(5), | ||||
|
sauimone
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r1566 | m_niceNumbers(false) | ||
|
Michal Klocek
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r1540 | { | ||
| } | ||||
| QValuesAxisPrivate::~QValuesAxisPrivate() | ||||
| { | ||||
| } | ||||
|
Michal Klocek
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r1698 | void QValuesAxisPrivate::handleDomainUpdated() | ||
|
Michal Klocek
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r1540 | { | ||
| Q_Q(QValuesAxis); | ||||
|
Michal Klocek
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r1698 | Domain* domain = qobject_cast<Domain*>(sender()); | ||
| Q_ASSERT(domain); | ||||
| if(orientation()==Qt::Horizontal){ | ||||
| q->setRange(domain->minX(),domain->maxX()); | ||||
| }else if(orientation()==Qt::Vertical){ | ||||
| q->setRange(domain->minY(),domain->maxY()); | ||||
| } | ||||
|
Michal Klocek
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r1540 | } | ||
|
Michal Klocek
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r1544 | |||
|
sauimone
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r1578 | void QValuesAxisPrivate::setMin(const QVariant &min) | ||
|
Michal Klocek
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r1544 | { | ||
|
sauimone
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r1578 | Q_Q(QValuesAxis); | ||
| bool ok; | ||||
| qreal value = min.toReal(&ok); | ||||
| if(ok) q->setMin(value); | ||||
|
Michal Klocek
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r1544 | } | ||
|
sauimone
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r1578 | void QValuesAxisPrivate::setMax(const QVariant &max) | ||
|
Michal Klocek
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r1544 | { | ||
|
Michal Klocek
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r1652 | |||
|
sauimone
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r1578 | Q_Q(QValuesAxis); | ||
| bool ok; | ||||
| qreal value = max.toReal(&ok); | ||||
| if(ok) q->setMax(value); | ||||
|
Michal Klocek
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r1544 | } | ||
|
Michal Klocek
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r1611 | void QValuesAxisPrivate::setRange(const QVariant &min, const QVariant &max) | ||
|
Michal Klocek
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r1544 | { | ||
| Q_Q(QValuesAxis); | ||||
|
sauimone
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r1578 | bool ok1; | ||
| bool ok2; | ||||
| qreal value1 = min.toReal(&ok1); | ||||
| qreal value2 = max.toReal(&ok2); | ||||
| if(ok1&&ok2) q->setRange(value1,value2); | ||||
|
Michal Klocek
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r1544 | } | ||
|
Michal Klocek
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r1556 | ChartAxis* QValuesAxisPrivate::createGraphics(ChartPresenter* presenter) | ||
| { | ||||
| Q_Q(QValuesAxis); | ||||
| if(m_orientation == Qt::Vertical){ | ||||
|
Marek Rosa
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r1561 | return new ChartValuesAxisY(q,presenter); | ||
|
Michal Klocek
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r1556 | }else{ | ||
|
Marek Rosa
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r1561 | return new ChartValuesAxisX(q,presenter); | ||
|
Michal Klocek
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r1556 | } | ||
| } | ||||
|
Michal Klocek
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r1695 | void QValuesAxisPrivate::intializeDomain(Domain* domain) | ||
|
Michal Klocek
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r1661 | { | ||
|
Michal Klocek
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r1705 | Q_Q(QValuesAxis); | ||
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sauimone
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r1662 | if(qFuzzyCompare(m_max,m_min)) { | ||
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r1661 | if(m_orientation==Qt::Vertical){ | ||
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r1705 | q->setRange(domain->minY(),domain->maxY()); | ||
|
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r1661 | }else{ | ||
|
Michal Klocek
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r1705 | q->setRange(domain->minX(), domain->maxX()); | ||
|
Michal Klocek
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r1661 | } | ||
|
Marek Rosa
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r1703 | } else { | ||
| if(m_orientation==Qt::Vertical){ | ||||
| domain->setRangeY(m_min, m_max); | ||||
| }else{ | ||||
| domain->setRangeX(m_min, m_max); | ||||
| } | ||||
|
Michal Klocek
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r1661 | } | ||
| } | ||||
|
Michal Klocek
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r1698 | //algorithm defined by Paul S.Heckbert GraphicalGems I | ||
| void QValuesAxisPrivate::looseNiceNumbers(qreal &min, qreal &max, int &ticksCount) const | ||||
| { | ||||
| qreal range = niceNumber(max-min,true); //range with ceiling | ||||
| qreal step = niceNumber(range/(ticksCount-1),false); | ||||
|
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r1725 | min = qFloor(min/step); | ||
| max = qCeil(max/step); | ||||
|
Michal Klocek
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r1698 | 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 QValuesAxisPrivate::niceNumber(qreal x,bool ceiling) const | ||||
| { | ||||
|
Michal Klocek
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r1725 | qreal z = qPow(10,qFloor(log10(x))); //find corresponding number of the form of 10^n than is smaller than x | ||
|
Michal Klocek
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r1698 | 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; | ||||
| } | ||||
|
Michal Klocek
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r1540 | #include "moc_qvaluesaxis.cpp" | ||
| #include "moc_qvaluesaxis_p.cpp" | ||||
| QTCOMMERCIALCHART_END_NAMESPACE | ||||