/****************************************************************************
**
** 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 "horizontalstackedbarchartitem_p.h"
#include "qabstractbarseries_p.h"
#include "qbarset_p.h"
#include "bar_p.h"

QTCOMMERCIALCHART_BEGIN_NAMESPACE

HorizontalStackedBarChartItem::HorizontalStackedBarChartItem(QAbstractBarSeries *series, QGraphicsItem* item)
    : AbstractBarChartItem(series, item)
{
}

QVector<QRectF> HorizontalStackedBarChartItem::calculateLayout()
{
    QVector<QRectF> layout;

    // Use temporary qreals for accuracy
    qreal categoryCount = m_series->d_func()->categoryCount();
    qreal setCount = m_series->count();
//    bool barsVisible = m_series->isVisible();

    qreal barWidth = m_series->d_func()->barWidth();

    for(int category = 0; category < categoryCount; category++) {
        qreal positiveSum = 0;
        qreal negativeSum = 0;
        for (int set = 0; set < setCount; set++) {
            qreal value = m_series->barSets().at(set)->at(category);
            QRectF rect;
            QPointF topLeft;
            QPointF bottomRight;
            if (value < 0) {
                bottomRight = domain()->calculateGeometryPoint(QPointF(value + negativeSum, category - barWidth / 2));
                if (domain()->type() == AbstractDomain::LogXYDomain
                        || domain()->type() == AbstractDomain::LogXLogYDomain)
                    topLeft = domain()->calculateGeometryPoint(QPointF(set ? negativeSum : domain()->minX(), category + barWidth / 2));
                else
                    topLeft = domain()->calculateGeometryPoint(QPointF(set ? negativeSum : 0, category + barWidth / 2));
                negativeSum += value;
            } else {
                bottomRight = domain()->calculateGeometryPoint(QPointF(value + positiveSum, category - barWidth / 2));
                if (domain()->type() == AbstractDomain::LogXYDomain
                        || domain()->type() == AbstractDomain::LogXLogYDomain)
                    topLeft = domain()->calculateGeometryPoint(QPointF(set ? positiveSum : domain()->minX(), category + barWidth / 2));
                else
                    topLeft = domain()->calculateGeometryPoint(QPointF(set ? positiveSum : 0, category + barWidth / 2));
                positiveSum += value;
            }
            rect.setTopLeft(topLeft);
            rect.setBottomRight(bottomRight);
            layout.append(rect);
        }
    }

    //    // AbstractDomain:
    //    qreal width = geometry().width();
    //    qreal height = geometry().height();
    //    qreal rangeY = m_domainMaxY - m_domainMinY;
    //    qreal rangeX = m_domainMaxX - m_domainMinX;
    //    qreal scaleY = (height / rangeY);
    //    qreal scaleX = (width / rangeX);
    //    qreal rectHeight = scaleY * m_series->d_func()->barWidth(); // On horizontal chart barWidth of the barseries means height of the rect.

    //    int itemIndex(0);
    //    for (int category = 0; category < categoryCount; category++) {
    //        qreal xMax = -scaleX * m_domainMinX + geometry().left();
    //        qreal xMin = -scaleX * m_domainMinX + geometry().left();
    //        for (int set = 0; set < setCount; set++) {
    //            QBarSetPrivate *barSet = m_series->d_func()->barsetAt(set)->d_ptr.data();

    //            qreal yPos = (m_domainMinY + 0.5 - barSet->pos(category)) * scaleY + geometry().bottom() - rectHeight / 2;

    //            qreal rectWidth = barSet->value(category) * scaleX;
    //            Bar *bar = m_bars.at(itemIndex);

    //            bar->setPen(barSet->m_pen);
    //            bar->setBrush(barSet->m_brush);
    //            if (qFuzzyCompare(rectHeight, 0))
    //                bar->setVisible(false);
    //            else
    //                bar->setVisible(barsVisible);

    //            QGraphicsSimpleTextItem *label = m_labels.at(itemIndex);

    //            if (!qFuzzyCompare(barSet->value(category), 0))
    //                label->setText(QString::number(barSet->value(category)));
    //            else
    //                label->setText(QString(""));
    //            label->setFont(barSet->m_labelFont);
    //            label->setBrush(barSet->m_labelBrush);

    //            if (rectWidth > 0) {
    //                QRectF rect(xMax, yPos - rectHeight, rectWidth, rectHeight);
    //                layout.append(rect);
    //                label->setPos(xMax + (rect.width() / 2 - label->boundingRect().width() / 2),
    //                              yPos - rectHeight / 2 - label->boundingRect().height() / 2);
    //                xMax += rectWidth;
    //            } else {
    //                QRectF rect(xMin, yPos - rectHeight, rectWidth, rectHeight);
    //                layout.append(rect);
    //                label->setPos(xMin + (rect.width() / 2 - label->boundingRect().width() / 2),
    //                              yPos - rectHeight / 2 - label->boundingRect().height() / 2);
    //                xMin += rectWidth;
    //            }
    //            itemIndex++;
    //        }
    //    }
    return layout;
}

#include "moc_horizontalstackedbarchartitem_p.cpp"

QTCOMMERCIALCHART_END_NAMESPACE