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**
** Copyright (C) 2013 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 Enterprise Charts Add-on.
**
** $QT_BEGIN_LICENSE$
** Licensees holding valid Qt Enterprise licenses may use this file in
** accordance with the Qt Enterprise 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
** $QT_END_LICENSE$
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****************************************************************************/

#include "qvalueaxis.h"
#include "qvalueaxis_p.h"
#include "chartvalueaxisx_p.h"
#include "chartvalueaxisy_p.h"
#include "abstractdomain_p.h"
#include "polarchartvalueaxisangular_p.h"
#include "polarchartvalueaxisradial_p.h"
#include "chartdataset_p.h"
#include "chartpresenter_p.h"
#include "charttheme_p.h"


QTCOMMERCIALCHART_BEGIN_NAMESPACE
/*!
    \class QValueAxis
    \inmodule Qt Charts
    \brief The QValueAxis class is used for manipulating chart's axis.
    \mainclass

    ValueAxis can be setup to show axis line with tick marks, grid lines and shades.
    Values of axis are drawn to position of ticks.

    Example code on how to use QValueAxis.
    \code
    QChartView *chartView = new QChartView;
    QLineSeries *series = new QLineSeries;
    // ...
    chartView->chart()->addSeries(series);

    QValueAxis *axisX = new QValueAxis;
    axisX->setRange(10, 20.5);
    axisX->setTickCount(10);
    axisX->setLabelFormat("%.2f");
    chartView->chart()->setAxisX(axisX, series);
    \endcode
*/
#ifdef QDOC_QT5
/*!
    \qmltype ValueAxis
    \instantiates QValueAxis
    \inqmlmodule QtCommercial.Chart

    \include doc/src/valueaxis.qdocinc
*/
#else
/*!
    \qmlclass ValueAxis QValueAxis

    \include ../doc/src/valueaxis.qdocinc
*/
#endif

/*!
  \property QValueAxis::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.
*/
/*!
  \qmlproperty real ValueAxis::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.
*/

/*!
  \property QValueAxis::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.
*/
/*!
  \qmlproperty real ValueAxis::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.
*/

/*!
  \property QValueAxis::tickCount
  Defines the number of ticks on the axis. This indicates how many grid lines are draw on the chart.
  The default value is 5, and it can not be below 2.
*/
/*!
  \qmlproperty real ValueAxis::tickCount
   Defines the number of ticks on the axis. This indicates how many grid lines are draw on the chart.
   The default value is 5, and it can not be below 2.
*/

/*!
  \property QValueAxis::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 ValueAxis::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 QValueAxis::minChanged(qreal min)
  Axis emits signal when \a min of axis has changed.
*/
/*!
  \qmlsignal ValueAxis::onMinChanged(real min)
  Axis emits signal when \a min of axis has changed.
*/

/*!
  \fn void QValueAxis::maxChanged(qreal max)
  Axis emits signal when \a max of axis has changed.
*/
/*!
  \qmlsignal ValueAxis::onMaxChanged(real max)
  Axis emits signal when \a max of axis has changed.
*/

/*!
  \fn void QValueAxis::tickCountChanged(int tickCount)
  Axis emits signal when \a tickCount of axis has changed.
*/
/*!
  \qmlsignal ValueAxis::tickCountChanged(int tickCount)
  Axis emits signal when \a tickCount of axis has changed.
*/

/*!
  \fn void QValueAxis::rangeChanged(qreal min, qreal max)
  Axis emits signal when \a min or \a max of axis has changed.
*/

/*!
  \fn void QValueAxis::labelFormatChanged(const QString &format)
  Axis emits signal when \a format of axis labels has changed.
*/
/*!
  \qmlsignal ValueAxis::labelFormatChanged(const QString &format)
  Axis emits signal when \a format of axis labels has changed.
*/

/*!
  \property QValueAxis::niceNumbersEnabled
  \obsolete
  Using this function can lead to unexpected behavior. Use applyNiceNumbers() instead.
*/

/*!
  \qmlproperty bool ValueAxis::niceNumbersEnabled
  Deprecated; Using this function can lead to unexpected behavior. Use applyNiceNumbers() instead.
*/

/*!
    Constructs an axis object which is a child of \a parent.
*/
QValueAxis::QValueAxis(QObject *parent) :
    QAbstractAxis(*new QValueAxisPrivate(this), parent)
{

}

/*!
    \internal
*/
QValueAxis::QValueAxis(QValueAxisPrivate &d, QObject *parent)
    : QAbstractAxis(d, parent)
{

}

/*!
    Destroys the object
*/
QValueAxis::~QValueAxis()
{
    Q_D(QValueAxis);
    if (d->m_chart)
        d->m_chart->removeAxis(this);
}

void QValueAxis::setMin(qreal min)
{
    Q_D(QValueAxis);
    setRange(min, qMax(d->m_max, min));
}

qreal QValueAxis::min() const
{
    Q_D(const QValueAxis);
    return d->m_min;
}

void QValueAxis::setMax(qreal max)
{
    Q_D(QValueAxis);
    setRange(qMin(d->m_min, max), max);
}

qreal QValueAxis::max() const
{
    Q_D(const QValueAxis);
    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 QValueAxis::setRange(qreal min, qreal max)
{
    Q_D(QValueAxis);
    d->setRange(min,max);
}

void QValueAxis::setTickCount(int count)
{
    Q_D(QValueAxis);
    if (d->m_tickCount != count && count >= 2) {
        d->m_tickCount = count;
        emit tickCountChanged(count);
    }
}

int QValueAxis::tickCount() const
{
    Q_D(const QValueAxis);
    return d->m_tickCount;
}

void QValueAxis::setNiceNumbersEnabled(bool enable)
{
    Q_D(QValueAxis);
    qWarning() << "Deprecated; Using this function can lead to unexpected behavior. " \
                  "Use applyNiceNumbers() instead.";
    if(enable) {
        QObject::connect(this,SIGNAL(rangeChanged(qreal,qreal)),this,SLOT(applyNiceNumbers()));
        QObject::connect(this,SIGNAL(tickCountChanged(int)),this,SLOT(applyNiceNumbers()));
        applyNiceNumbers();
    }
    else {
        QObject::disconnect(this,SIGNAL(rangeChanged(qreal,qreal)),this,SLOT(applyNiceNumbers()));
        QObject::disconnect(this,SIGNAL(tickCountChanged(int)),this,SLOT(applyNiceNumbers()));
    }
    d->m_niceNumbersEnabled=enable;
}

bool QValueAxis::niceNumbersEnabled() const
{
    Q_D(const QValueAxis);
    qWarning() << "Deprecated; Using this function can lead to unexpected behavior. " \
                  "Use applyNiceNumbers() instead.";
    return d->m_niceNumbersEnabled;
}

void QValueAxis::setLabelFormat(const QString &format)
{
    Q_D(QValueAxis);
    d->m_format = format;
    emit labelFormatChanged(format);
}

QString QValueAxis::labelFormat() const
{
    Q_D(const QValueAxis);
    return d->m_format;
}

/*!
  Returns the type of the axis
*/
QAbstractAxis::AxisType QValueAxis::type() const
{
    return AxisTypeValue;
}

/*!
    This method modifies range and number of ticks on the axis to look "nice". Algorithm considers numbers that
    can be expressed as form of 1*10^n, 2* 10^n or 5*10^n as a nice numbers. These numbers are used for spacing the ticks.
    This method will modify the current range and number of ticks.
    \sa setRange(), setTickCount()
*/
void QValueAxis::applyNiceNumbers()
{
    Q_D(QValueAxis);
    if(d->m_applying) return;
    qreal min = d->m_min;
    qreal max = d->m_max;
    int ticks = d->m_tickCount;
    AbstractDomain::looseNiceNumbers(min,max,ticks);
    d->m_applying=true;
    d->setRange(min,max);
    setTickCount(ticks);
    d->m_applying=false;
}

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

QValueAxisPrivate::QValueAxisPrivate(QValueAxis *q)
    : QAbstractAxisPrivate(q),
      m_min(0),
      m_max(0),
      m_tickCount(5),
      m_format(QString::null),
      m_applying(false),
      m_niceNumbersEnabled(false)
{

}

QValueAxisPrivate::~QValueAxisPrivate()
{

}

void QValueAxisPrivate::setMin(const QVariant &min)
{
    Q_Q(QValueAxis);
    bool ok;
    qreal value = min.toReal(&ok);
    if (ok)
        q->setMin(value);
}

void QValueAxisPrivate::setMax(const QVariant &max)
{
    Q_Q(QValueAxis);
    bool ok;
    qreal value = max.toReal(&ok);
    if (ok)
        q->setMax(value);
}

void QValueAxisPrivate::setRange(const QVariant &min, const QVariant &max)
{
    Q_Q(QValueAxis);
    bool ok1;
    bool ok2;
    qreal value1 = min.toReal(&ok1);
    qreal value2 = max.toReal(&ok2);
    if (ok1 && ok2)
        q->setRange(value1, value2);
}

void QValueAxisPrivate::setRange(qreal min, qreal max)
{
	Q_Q(QValueAxis);
    bool changed = false;

    if (min > max)
        return;

    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 QValueAxisPrivate::initializeGraphics(QGraphicsItem *parent)
{
    Q_Q(QValueAxis);
    ChartAxisElement *axis(0);

    if (m_chart->chartType() == QChart::ChartTypeCartesian) {
        if (orientation() == Qt::Vertical)
            axis = new ChartValueAxisY(q,parent);
        if (orientation() == Qt::Horizontal)
            axis = new ChartValueAxisX(q,parent);
    }

    if (m_chart->chartType() == QChart::ChartTypePolar) {
        if (orientation() == Qt::Vertical)
            axis = new PolarChartValueAxisRadial(q, parent);
        if (orientation() == Qt::Horizontal)
            axis = new PolarChartValueAxisAngular(q, parent);
    }

    m_item.reset(axis);
    QAbstractAxisPrivate::initializeGraphics(parent);
}


void QValueAxisPrivate::initializeDomain(AbstractDomain *domain)
{
    if (orientation() == Qt::Vertical) {
        if (!qFuzzyIsNull(m_max - m_min))
            domain->setRangeY(m_min, m_max);
        else
            setRange(domain->minY(), domain->maxY());
    }
    if (orientation() == Qt::Horizontal) {
        if (!qFuzzyIsNull(m_max - m_min))
            domain->setRangeX(m_min, m_max);
        else
            setRange(domain->minX(), domain->maxX());
    }
}

#include "moc_qvalueaxis.cpp"
#include "moc_qvalueaxis_p.cpp"

QTCOMMERCIALCHART_END_NAMESPACE