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#include <QtCharts/QAreaSeries>
#include <private/qareaseries_p.h>
#include <QtCharts/QLineSeries>
#include <private/areachartitem_p.h>
#include <private/abstractdomain_p.h>
#include <private/chartdataset_p.h>
#include <private/charttheme_p.h>
#include <QtCharts/QValueAxis>
#include <QtCharts/QAreaLegendMarker>
#include <private/qchart_p.h>

QT_BEGIN_NAMESPACE

/*!
    \class QAreaSeries
    \inmodule QtCharts
    \brief The QAreaSeries class presents data in area charts.

    An area series is used to show quantitative data. It is based on a line series, in the way that
    the area between the boundary lines is emphasized with color. Since the area series is based on
    the line series, the QAreaSeries constructor needs a QLineSeries instance, which defines the
    \e upper boundary of the area. The area chart is drawn using the bottom of the plot area as the
    \e lower boundary by default. Instead of the bottom of the plot area, the lower boundary can be
    specified by another line. In that case, QAreaSeries should be initialized with two QLineSeries
    instances.

    \note The terms \e upper and \e lower boundary can be misleading in cases where the value of the
    lower boundary is greater than that of the upper boundary. The main point is that the
    area between these two boundary lines will be filled.

    See the \l {AreaChart Example} {area chart example} to learn how to create a simple area chart.
    \image examples_areachart.png
*/

/*!
    \qmltype AreaSeries
    \instantiates QAreaSeries
    \inqmlmodule QtCharts

    \inherits AbstractSeries

    \brief Presents data in area charts.

    An area series is used to show quantitative data. It is based on a line
    series, in the way that the area between the boundary lines is emphasized
    with color. The LineSeries type defines the \e upper boundary of the
    area. The area chart is drawn using the bottom of the plot area as the
    \e lower boundary by default. Instead of the bottom of the plot area, the
    lower boundary can be specified by another line. In that case, the
    AreaSeries should use two LineSeries types.

    \note The terms \e upper and \e lower boundary can be misleading in cases
    where the value of the lower boundary is greater than that of the upper
    boundary. The main point is that the area between these two boundary lines
    will be filled.

    \image examples_qmlchart4.png

    The following QML shows how to create a simple area chart:
    \snippet qmlchart/qml/qmlchart/View4.qml 1

    \note Adding the same line series to a chart and area series is not supported. The series used as
    boundary lines should be defined only for the area series.
*/

/*!
    \qmlproperty AbstractAxis AreaSeries::axisX
    The x-axis used for the series. If you leave both axisX and axisXTop
    undefined, a value axis is created for the series.
    \sa axisXTop, ValueAxis
*/

/*!
    \qmlproperty AbstractAxis AreaSeries::axisY
    The y-axis used for the series. If you leave both axisY and axisYRight
    undefined, a value axis is created for the series.
    \sa axisYRight, ValueAxis
*/

/*!
    \qmlproperty AbstractAxis AreaSeries::axisXTop
    The x-axis used for the series, drawn on top of the chart view.

    \note You can only provide either axisX or axisXTop, not both.
    \sa axisX
*/

/*!
    \qmlproperty AbstractAxis AreaSeries::axisYRight
    The y-axis used for the series, drawn to the right on the chart view.

    \note You can only provide either axisY or axisYRight, not both.
    \sa axisY
*/

/*!
    \qmlproperty AbstractAxis AreaSeries::axisAngular
    The angular axis used for the series, drawn around the polar chart view.
    \sa axisX, PolarChartView
*/

/*!
    \qmlproperty AbstractAxis AreaSeries::axisRadial
    The radial axis used for the series, drawn inside the polar chart view.
    \sa axisY, PolarChartView
*/

/*!
   \property QAreaSeries::upperSeries
   \brief The upper one of the two line series used to define area series boundaries.
*/
/*!
   \qmlproperty LineSeries AreaSeries::upperSeries
   The upper one of the two line series used to define area series boundaries.
*/

/*!
    \property QAreaSeries::lowerSeries
    \brief The lower one of the two line series used to define area series boundaries.

    \note If QAreaSeries was constructed without a\ lowerSeries, this is null.
*/
/*!
    \qmlproperty LineSeries AreaSeries::lowerSeries
    The lower one of the two line series used to define area series boundaries.

    \note If AreaSeries was constructed without a\ lowerSeries, this is null.
*/

/*!
    \property QAreaSeries::color
    \brief The fill (brush) color of the series. This is a convenience property for modifying the
    color of the brush.
    \sa QAreaSeries::brush()
*/
/*!
    \qmlproperty color AreaSeries::color
    Fill (brush) color of the series.
*/

/*!
    \property QAreaSeries::borderColor
    \brief The line (pen) color of the series. This is a convenience property for modifying the
    color of the pen.
    \sa QAreaSeries::pen()
*/
/*!
    \qmlproperty color AreaSeries::borderColor
    Line (pen) color of the series.
*/

/*!
    \qmlproperty real AreaSeries::borderWidth
    The width of the border line. By default, the width is 2.0.
*/

/*!
   \fn QPen QAreaSeries::pen() const
   \brief Returns the pen used to draw the line for this series.
    \sa setPen()
*/

/*!
   \fn QPen QAreaSeries::brush() const
   \brief Returns the brush used to draw the line for this series.
    \sa setBrush()
*/

/*!
    \qmlproperty brush AreaSeries::brush
    The brush used to draw to draw the line for this series.
*/

/*!
    \qmlproperty QString AreaSeries::brushFilename
    The name of the file used as a brush image for the series.
*/

/*!
    \fn void QAreaSeries::colorChanged(QColor color)
    \brief This signal is emitted when the fill (brush) color changes to \a color.
*/

/*!
    \fn void QAreaSeries::borderColorChanged(QColor color)
    \brief This signal is emitted when the line (pen) color changes to \a color.
*/

/*!
    \fn void QAreaSeries::clicked(const QPointF& point)
    \brief This signal is emitted when the user triggers a press on \a point by clicking it in an
    area chart.
    \sa pressed, released, doubleClicked
*/
/*!
    \qmlsignal AreaSeries::clicked(point point)
    This signal is emitted when the user triggers a press on \a point by clicking it in an
    area chart.

    The corresponding signal handler is \c {onClicked}.

    \sa pressed, released, doubleClicked
*/

/*!
    \fn void QAreaSeries::hovered(const QPointF &point, bool state)
    This signal is emitted when the user hovers the mouse cursor over a series or moves it away from
    the series. \a point shows the origin (coordinate) of the hover event. \a state is \c true when
    the cursor hovers over the series and turns \e false when it moves away from the series.
*/
/*!
    \qmlsignal AreaSeries::hovered(point point, bool state)
    This signal is emitted when the user hovers the mouse cursor over a series or moves it away from
    the series. \a point shows the origin (coordinate) of the hover event. \a state is \c true when
    the cursor hovers over the series and turns \e false when it moves away from the series.

    The corresponding signal handler is \c {onHovered}.
*/

/*!
    \fn void QAreaSeries::pressed(const QPointF& point)
    \brief This signal is emitted when the user presses the point specified by \a point
    in an area chart.
    \sa clicked, released, doubleClicked
*/
/*!
    \qmlsignal AreaSeries::pressed(point point)
    This signal is emitted when the user presses the point specified by \a point in an area chart.

    The corresponding signal handler is \c {onPressed}.

    \sa clicked, released, doubleClicked
*/

/*!
    \fn void QAreaSeries::released(const QPointF& point)
    \brief This signal is emitted when the user releases a press that was triggered on
    \a point in an area chart.
    \sa pressed, clicked, doubleClicked
*/
/*!
    \qmlsignal AreaSeries::released(point point)
    This signal is emitted when the user releases a press that was triggered on
    \a point in an area chart.

    The corresponding signal handler is \c {onReleased}.

    \sa pressed, clicked, doubleClicked
*/

/*!
    \fn void QAreaSeries::doubleClicked(const QPointF& point)
    \brief This signal is emitted when the user triggers the first press in an area chart
    by doubleclicking \a point.
    \sa pressed, released, clicked
*/
/*!
    \qmlsignal AreaSeries::doubleClicked(point point)
    This signal is emitted when the user triggers the first press in an area chart
    by doubleclicking \a point.

    The corresponding signal handler is \c {onDoubleClicked}.

    \sa pressed, released, clicked
*/

/*!
    \fn void QAreaSeries::selected()
    \internal
*/

/*!
    \fn void QAreaSeriesPrivate::updated()
    \internal
*/

/*!
    \property QAreaSeries::pointLabelsFormat
    \brief The format used for showing labels with series points.

    QAreaSeries supports the following format tags:
    \table
      \row
        \li @xPoint      \li The x value of the data point
      \row
        \li @yPoint      \li The y value of the data point
    \endtable

    For example, the following usage of the format tags would produce labels that have the data
    point (x, y) shown inside brackets separated by a comma:
    \code
    series->setPointLabelsFormat("(@xPoint, @yPoint)");
    \endcode

    By default, the label format is set to \c{@xPoint, @yPoint}. The labels are shown on the plot
    area, whereas labels on the edge of the plot area are cut. If the points are close to each
    other, the labels may overlap.

    \sa QAreaSeries::pointLabelsVisible, QAreaSeries::pointLabelsFont, QAreaSeries::pointLabelsColor
*/
/*!
    \qmlproperty string AreaSeries::pointLabelsFormat
    The format used for showing labels with series points.

    \sa QAreaSeries::pointLabelsFormat, pointLabelsVisible, pointLabelsFont, pointLabelsColor
*/
/*!
    \fn void QAreaSeries::pointLabelsFormatChanged(const QString &format)
    This signal is emitted when the \a format of data point labels is changed.
*/

/*!
    \property QAreaSeries::pointLabelsVisible
    \brief The visibility of data point labels. False by default.

    \sa QAreaSeries::pointLabelsFormat, QAreaSeries::pointLabelsClipping
*/
/*!
    \qmlproperty bool AreaSeries::pointLabelsVisible
    Defines the visibility of data point labels.

    \sa pointLabelsFormat, pointLabelsClipping
*/
/*!
    \fn void QAreaSeries::pointLabelsVisibilityChanged(bool visible)
    This signal is emitted when the visibility of the data point labels changes to \a visible.
*/

/*!
    \property QAreaSeries::pointLabelsFont
    \brief The font used for data point labels.

    \sa QAreaSeries::pointLabelsFormat
*/
/*!
    \qmlproperty font AreaSeries::pointLabelsFont
    Defines the font used for data point labels.

    \sa pointLabelsFormat
*/
/*!
    \fn void QAreaSeries::pointLabelsFontChanged(const QFont &font);
    This signal is emitted when the font used for data point labels changes to \a font.
*/

/*!
    \property QAreaSeries::pointLabelsColor
    \brief The color used for data point labels. By default, the color is the color of the brush
    defined for labels in the theme.

    \sa QAreaSeries::pointLabelsFormat
*/
/*!
    \qmlproperty font AreaSeries::pointLabelsColor
    Defines the color used for data point labels. By default, the color is the color of the brush
    defined for labels in the theme.

    \sa pointLabelsFormat
*/
/*!
    \fn void QAreaSeries::pointLabelsColorChanged(const QColor &color);
    This signal is emitted when the color used for data point labels changes to \a color.
*/

/*!
    \property QAreaSeries::pointLabelsClipping
    \brief The clipping for data point labels. True by default. The labels on the edge of the plot
    area are cut when clipping is enabled.

    \sa pointLabelsVisible
*/
/*!
    \qmlproperty bool AreaSeries::pointLabelsClipping
    Defines the clipping for data point labels. True by default. The labels on the edge of the plot
    area are cut when clipping is enabled.

    \sa pointLabelsVisible
*/
/*!
    \fn void QAreaSeries::pointLabelsClippingChanged(bool clipping)
    This signal is emitted when the clipping of the data point labels changes to \a clipping.
*/

/*!
    Constructs an area series object that will be spanned between an \a upperSeries line and a
    \a lowerSeries line.  If no \a lowerSeries is passed to the constructor, the x-axis is used
    as the lower bound instead.

    The QAreaSeries does not own the upper or lower series, but the ownership stays with the caller.
    When the series object is added to QChartView or QChart, the instance ownership is transferred.
*/
QAreaSeries::QAreaSeries(QLineSeries *upperSeries, QLineSeries *lowerSeries)
    : QAbstractSeries(*new QAreaSeriesPrivate(upperSeries, lowerSeries, this), upperSeries)
{
    if (upperSeries)
        upperSeries->d_ptr->setBlockOpenGL(true);
    if (lowerSeries)
        lowerSeries->d_ptr->setBlockOpenGL(true);
}

/*!
    Constructs an area series object without an upper or a lower series with the \a parent object.
*/
QAreaSeries::QAreaSeries(QObject *parent)
    : QAbstractSeries(*new QAreaSeriesPrivate(0, 0, this), parent)
{
}

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

/*!
    Returns QAbstractSeries::SeriesTypeArea.
*/
QAbstractSeries::SeriesType QAreaSeries::type() const
{
    return QAbstractSeries::SeriesTypeArea;
}

/*!
    Sets the \a series that is to be used as the area chart upper series.
    If the upper series is null, the area chart is not drawn, even if it has a lower series.
*/
void QAreaSeries::setUpperSeries(QLineSeries *series)
{
    Q_D(QAreaSeries);

    if (d->m_upperSeries != series) {
        if (series)
            series->d_ptr->setBlockOpenGL(true);
        d->m_upperSeries = series;
        if (!d->m_item.isNull())
            static_cast<AreaChartItem *>(d->m_item.data())->setUpperSeries(series);
    }
}

QLineSeries *QAreaSeries::upperSeries() const
{
    Q_D(const QAreaSeries);
    return d->m_upperSeries;
}

/*!
    Sets the \a series that is to be used as the area chart lower series.
*/
void QAreaSeries::setLowerSeries(QLineSeries *series)
{
    Q_D(QAreaSeries);
    if (d->m_lowerSeries != series) {
        if (series)
            series->d_ptr->setBlockOpenGL(true);
        d->m_lowerSeries = series;
        if (!d->m_item.isNull())
            static_cast<AreaChartItem *>(d->m_item.data())->setLowerSeries(series);
    }
}

QLineSeries *QAreaSeries::lowerSeries() const
{
    Q_D(const QAreaSeries);
    return d->m_lowerSeries;
}

/*!
    Sets the \a pen used for drawing the area outline.
*/
void QAreaSeries::setPen(const QPen &pen)
{
    Q_D(QAreaSeries);
    if (d->m_pen != pen) {
        bool emitColorChanged = pen.color() != d->m_pen.color();
        d->m_pen = pen;
        emit d->updated();
        if (emitColorChanged)
            emit borderColorChanged(pen.color());
    }
}

QPen QAreaSeries::pen() const
{
    Q_D(const QAreaSeries);
    if (d->m_pen == QChartPrivate::defaultPen())
        return QPen();
    else
        return d->m_pen;
}

/*!
    Sets the \a brush used for filling the area.
*/
void QAreaSeries::setBrush(const QBrush &brush)
{
    Q_D(QAreaSeries);
    if (d->m_brush != brush) {
        bool emitColorChanged = brush.color() != d->m_brush.color();
        d->m_brush = brush;
        emit d->updated();
        if (emitColorChanged)
            emit colorChanged(brush.color());
    }
}

QBrush QAreaSeries::brush() const
{
    Q_D(const QAreaSeries);
    if (d->m_brush == QChartPrivate::defaultBrush())
        return QBrush();
    else
        return d->m_brush;
}

void QAreaSeries::setColor(const QColor &color)
{
    QBrush b = brush();
    if (b == QBrush())
        b.setStyle(Qt::SolidPattern);
    b.setColor(color);
    setBrush(b);
}

QColor QAreaSeries::color() const
{
    return brush().color();
}

void QAreaSeries::setBorderColor(const QColor &color)
{
    QPen p = pen();
    p.setColor(color);
    setPen(p);
}

QColor QAreaSeries::borderColor() const
{
    return pen().color();
}

/*!
    Determines whether data points are \a visible and should be drawn on the line.
*/
void QAreaSeries::setPointsVisible(bool visible)
{
    Q_D(QAreaSeries);
    if (d->m_pointsVisible != visible) {
        d->m_pointsVisible = visible;
        emit d->updated();
    }
}

/*!
    Returns whether the points are drawn for this series.
    \sa setPointsVisible()
*/
bool QAreaSeries::pointsVisible() const
{
    Q_D(const QAreaSeries);
    return d->m_pointsVisible;
}

void QAreaSeries::setPointLabelsFormat(const QString &format)
{
    Q_D(QAreaSeries);
    if (d->m_pointLabelsFormat != format) {
        d->m_pointLabelsFormat = format;
        emit pointLabelsFormatChanged(format);
    }
}

QString QAreaSeries::pointLabelsFormat() const
{
    Q_D(const QAreaSeries);
    return d->m_pointLabelsFormat;
}

void QAreaSeries::setPointLabelsVisible(bool visible)
{
    Q_D(QAreaSeries);
    if (d->m_pointLabelsVisible != visible) {
        d->m_pointLabelsVisible = visible;
        emit pointLabelsVisibilityChanged(visible);
    }
}

bool QAreaSeries::pointLabelsVisible() const
{
    Q_D(const QAreaSeries);
    return d->m_pointLabelsVisible;
}

void QAreaSeries::setPointLabelsFont(const QFont &font)
{
    Q_D(QAreaSeries);
    if (d->m_pointLabelsFont != font) {
        d->m_pointLabelsFont = font;
        emit pointLabelsFontChanged(font);
    }
}

QFont QAreaSeries::pointLabelsFont() const
{
    Q_D(const QAreaSeries);
    return d->m_pointLabelsFont;
}

void QAreaSeries::setPointLabelsColor(const QColor &color)
{
    Q_D(QAreaSeries);
    if (d->m_pointLabelsColor != color) {
        d->m_pointLabelsColor = color;
        emit pointLabelsColorChanged(color);
    }
}

QColor QAreaSeries::pointLabelsColor() const
{
    Q_D(const QAreaSeries);
    if (d->m_pointLabelsColor == QChartPrivate::defaultPen().color())
        return QPen().color();
    else
        return d->m_pointLabelsColor;
}

void QAreaSeries::setPointLabelsClipping(bool enabled)
{
    Q_D(QAreaSeries);
    if (d->m_pointLabelsClipping != enabled) {
        d->m_pointLabelsClipping = enabled;
        emit pointLabelsClippingChanged(enabled);
    }
}

bool QAreaSeries::pointLabelsClipping() const
{
    Q_D(const QAreaSeries);
    return d->m_pointLabelsClipping;
}

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

QAreaSeriesPrivate::QAreaSeriesPrivate(QLineSeries *upperSeries, QLineSeries *lowerSeries, QAreaSeries *q)
    : QAbstractSeriesPrivate(q),
      m_brush(QChartPrivate::defaultBrush()),
      m_pen(QChartPrivate::defaultPen()),
      m_upperSeries(upperSeries),
      m_lowerSeries(lowerSeries),
      m_pointsVisible(false),
      m_pointLabelsFormat(QLatin1String("@xPoint, @yPoint")),
      m_pointLabelsVisible(false),
      m_pointLabelsFont(QChartPrivate::defaultFont()),
      m_pointLabelsColor(QChartPrivate::defaultPen().color()),
      m_pointLabelsClipping(true)
{
}

void QAreaSeriesPrivate::initializeDomain()
{
    Q_Q(QAreaSeries);

    qreal minX(0.0);
    qreal minY(0.0);
    qreal maxX(1.0);
    qreal maxY(1.0);

    QLineSeries *upperSeries = q->upperSeries();
    QLineSeries *lowerSeries = q->lowerSeries();

    if (upperSeries) {
        const auto &points = upperSeries->points();

        if (!points.isEmpty()) {
            minX = points[0].x();
            minY = points[0].y();
            maxX = minX;
            maxY = minY;

            for (int i = 0; i < points.count(); i++) {
                qreal x = points[i].x();
                qreal y = points[i].y();
                minX = qMin(minX, x);
                minY = qMin(minY, y);
                maxX = qMax(maxX, x);
                maxY = qMax(maxY, y);
            }
        }
    }
    if (lowerSeries) {
        const auto &points = lowerSeries->points();

        if (!points.isEmpty()) {
            if (!upperSeries) {
                minX = points[0].x();
                minY = points[0].y();
                maxX = minX;
                maxY = minY;
            }

            for (int i = 0; i < points.count(); i++) {
                qreal x = points[i].x();
                qreal y = points[i].y();
                minX = qMin(minX, x);
                minY = qMin(minY, y);
                maxX = qMax(maxX, x);
                maxY = qMax(maxY, y);
            }
        }
    }

    domain()->setRange(minX, maxX, minY, maxY);
}

void QAreaSeriesPrivate::initializeGraphics(QGraphicsItem* parent)
{
    Q_Q(QAreaSeries);
    AreaChartItem *area = new AreaChartItem(q,parent);
    m_item.reset(area);
    QAbstractSeriesPrivate::initializeGraphics(parent);
}
void  QAreaSeriesPrivate::initializeAnimations(QChart::AnimationOptions options, int duration,
                                               QEasingCurve &curve)
{
    Q_Q(QAreaSeries);
    AreaChartItem *area = static_cast<AreaChartItem *>(m_item.data());

    if (q->upperSeries() && area->upperLineItem()->animation())
        area->upperLineItem()->animation()->stopAndDestroyLater();
    if (q->lowerSeries() && area->lowerLineItem()->animation())
        area->lowerLineItem()->animation()->stopAndDestroyLater();

    if (options.testFlag(QChart::SeriesAnimations)) {
        area->upperLineItem()->setAnimation(new XYAnimation(area->upperLineItem(), duration,
                                                            curve));
        if (q->lowerSeries())
            area->lowerLineItem()->setAnimation(new XYAnimation(area->lowerLineItem(), duration,
                                                                curve));
    } else {
        if (q->upperSeries())
            area->upperLineItem()->setAnimation(0);
        if (q->lowerSeries())
               area->lowerLineItem()->setAnimation(0);
    }
    QAbstractSeriesPrivate::initializeAnimations(options, duration, curve);
}

QList<QLegendMarker*> QAreaSeriesPrivate::createLegendMarkers(QLegend* legend)
{
    Q_Q(QAreaSeries);
    QList<QLegendMarker*> list;
    return list << new QAreaLegendMarker(q,legend);
}


void QAreaSeriesPrivate::initializeAxes()
{

}

QAbstractAxis::AxisType QAreaSeriesPrivate::defaultAxisType(Qt::Orientation orientation) const
{
    Q_UNUSED(orientation);
    return QAbstractAxis::AxisTypeValue;
}

QAbstractAxis* QAreaSeriesPrivate::createDefaultAxis(Qt::Orientation orientation) const
{
    Q_UNUSED(orientation);
    return new QValueAxis;
}

void QAreaSeriesPrivate::initializeTheme(int index, ChartTheme* theme, bool forced)
{
    Q_Q(QAreaSeries);

    const QList<QGradient> gradients = theme->seriesGradients();
    const QList<QColor> colors = theme->seriesColors();

    if (forced || QChartPrivate::defaultPen() == m_pen) {
        QPen pen;
        pen.setColor(ChartThemeManager::colorAt(gradients.at(index % gradients.size()), 0.0));
        pen.setWidthF(2);
        q->setPen(pen);
    }

    if (forced || QChartPrivate::defaultBrush() == m_brush) {
        QBrush brush(colors.at(index % colors.size()));
        q->setBrush(brush);
    }

    if (forced || QChartPrivate::defaultPen().color() == m_pointLabelsColor) {
        QColor color = theme->labelBrush().color();
        q->setPointLabelsColor(color);
    }
}

QT_END_NAMESPACE

#include "moc_qareaseries.cpp"
#include "moc_qareaseries_p.cpp"
