/****************************************************************************
 **
 ** 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 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 "boxwhiskers_p.h"
#include <QPainter>
#include <QWidget>

QTCOMMERCIALCHART_BEGIN_NAMESPACE

BoxWhiskers::BoxWhiskers(QBoxSet *set, AbstractDomain *domain, QGraphicsObject *parent) :
    QGraphicsObject(parent),
    m_boxSet(set),
    m_domain(domain)
{
    setAcceptHoverEvents(true);
    setAcceptedMouseButtons(Qt::MouseButtonMask);
}

BoxWhiskers::~BoxWhiskers()
{
}

void BoxWhiskers::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
    Q_UNUSED(event)
    emit clicked(m_boxSet);
}

void BoxWhiskers::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
{
    Q_UNUSED(event)
    emit hovered(true, m_boxSet);
}

void BoxWhiskers::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
{
    Q_UNUSED(event)
    emit hovered(false, m_boxSet);
}

void BoxWhiskers::setBrush(const QBrush &brush)
{
    m_brush = brush;
    update();
}

void BoxWhiskers::setPen(const QPen &pen)
{
    m_pen = pen;
    update();
}

void BoxWhiskers::setLayout(const BoxWhiskersData &data)
{
    m_data = data;

    updateGeometry();
    update();
}


QSizeF BoxWhiskers::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
{
    Q_UNUSED(which)
    Q_UNUSED(constraint)

    return QSizeF();
}

void BoxWhiskers::setGeometry(const QRectF &rect)
{
    Q_UNUSED(rect)
}

void BoxWhiskers::setDomainSize(const QSizeF &size)
{
    m_domainSize = size;

    updateBoundingRect();
}

QRectF BoxWhiskers::boundingRect() const
{
    return m_boundingRect;
}

void BoxWhiskers::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
    Q_UNUSED(option)
    Q_UNUSED(widget)

    painter->setPen(m_pen);
    painter->setBrush(m_brush);
    painter->setClipRect(parentItem()->boundingRect());
    painter->scale(m_domainSize.width() / m_data.m_boxItems, m_domainSize.height() / m_domain->spanY());
    painter->drawPath(m_boxPath);
}

void BoxWhiskers::updateGeometry()
{
    prepareGeometryChange();

    QPainterPath path;

    qreal columnWidth = 1.0 / m_data.m_seriesCount;
    qreal left = 0.25 * columnWidth + columnWidth * m_data.m_seriesIndex;
    qreal right = 0.75 * columnWidth + columnWidth * m_data.m_seriesIndex;
    qreal middle = 0.5 * columnWidth + columnWidth * m_data.m_seriesIndex;
    qreal domainMaxY = m_domain->maxY();

    // Upper whisker
    path.moveTo(left + m_data.m_index, domainMaxY - m_data.m_upperExtreme);
    path.lineTo(right + m_data.m_index, domainMaxY - m_data.m_upperExtreme);
    path.moveTo(middle + m_data.m_index, domainMaxY - m_data.m_upperExtreme);
    path.lineTo(middle + m_data.m_index, domainMaxY - m_data.m_upperQuartile);

    // Middle Box
    path.addRect(left + m_data.m_index, domainMaxY - m_data.m_upperQuartile,
                 0.5 * columnWidth, m_data.m_upperQuartile - m_data.m_lowerQuartile);

    // Median/mean line
    path.moveTo(left + m_data.m_index, domainMaxY - m_data.m_median);
    path.lineTo(right + m_data.m_index, domainMaxY - m_data.m_median);

    // Lower whisker
    path.moveTo(left + m_data.m_index, domainMaxY - m_data.m_lowerExtreme);
    path.lineTo(right + m_data.m_index, domainMaxY - m_data.m_lowerExtreme);
    path.moveTo(middle + m_data.m_index, domainMaxY - m_data.m_lowerExtreme);
    path.lineTo(middle + m_data.m_index, domainMaxY - m_data.m_lowerQuartile);

    path.closeSubpath();

    m_boxPath = path;

    updateBoundingRect();
}

void BoxWhiskers::updateBoundingRect()
{
    qreal scaleY = m_domainSize.height() / (m_domain->maxY() - m_domain->minY());
    qreal scaleX = m_domainSize.width() / m_data.m_boxItems;
    QRectF br = m_boxPath.boundingRect();

    m_boundingRect = QRectF(br.x() * scaleX, br.y() * scaleY,
                            br.width() * scaleX, br.height() * scaleY);
}

#include "moc_boxwhiskers_p.cpp"

QTCOMMERCIALCHART_END_NAMESPACE