/****************************************************************************
**
** 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, ChartPresenter *presenter) :
    AbstractBarChartItem(series, presenter)
{
}

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();

    // Domain:
    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 barHeight = 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 + m_rect.bottom() - barHeight/2;

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

            bar->setPen(barSet->m_pen);
            bar->setBrush(barSet->m_brush);
            if (qFuzzyIsNull(barHeight)) {
                bar->setVisible(false);
            } else {
                bar->setVisible(barsVisible);
            }

            QGraphicsSimpleTextItem* label = m_labels.at(itemIndex);

            if (!qFuzzyIsNull(barSet->value(category))) {
                label->setText(QString::number(barSet->value(category)));
            } else {
                label->setText(QString(""));
            }
            label->setFont(barSet->m_labelFont);
            label->setBrush(barSet->m_labelBrush);

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

#include "moc_horizontalstackedbarchartitem_p.cpp"

QTCOMMERCIALCHART_END_NAMESPACE