/****************************************************************************
**
** 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 "qlogvalueaxis.h"
#include "qlogvalueaxis_p.h"
#include "chartlogvalueaxisx_p.h"
#include "chartlogvalueaxisy_p.h"
#include "abstractdomain_p.h"
#include <float.h>
#include <cmath>

QTCOMMERCIALCHART_BEGIN_NAMESPACE
/*!
    \class QLogValueAxis
    \brief The QLogValueAxis class is used for manipulating chart's axis.
    \mainclass
*/

/*!
    \qmlclass DateTimeAxis QLogValueAxis
    \brief The DateTimeAxis element is used for manipulating chart's axes
    \inherits AbstractAxis
*/

/*!
  \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.
*/
/*!
  \qmlproperty real ValuesAxis::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 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.
*/
/*!
  \qmlproperty real ValuesAxis::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.
*/

/*!
  \fn void QLogValueAxis::minChanged(qreal min)
  Axis emits signal when \a min of axis has changed.
*/
/*!
  \qmlsignal ValuesAxis::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 ValuesAxis::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.
*/

/*!
    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;
}

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 q->rangeChanged(min, max);
            emit rangeChanged(min,max);
        }
    }
}

void QLogValueAxisPrivate::initializeGraphics(QGraphicsItem* parent)
{
    Q_Q(QLogValueAxis);
    ChartAxis* axis(0);
    if (orientation() == Qt::Vertical)
        axis = new ChartLogValueAxisY(q,parent);
    if (orientation() == Qt::Horizontal)
        axis = new ChartLogValueAxisX(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 {
            domain->setRangeY(m_min, domain->maxY());
        }
    }
    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 {
            domain->setRangeX(m_min, domain->maxX());
        }
    }
}

#include "moc_qlogvalueaxis.cpp"
#include "moc_qlogvalueaxis_p.cpp"

QTCOMMERCIALCHART_END_NAMESPACE