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

QTCOMMERCIALCHART_BEGIN_NAMESPACE

HorizontalPercentBarChartItem::HorizontalPercentBarChartItem(QAbstractBarSeries *series, ChartPresenter *presenter)
    : AbstractBarChartItem(series, presenter)
{
}

QVector<QRectF> HorizontalPercentBarChartItem::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 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 colSum = m_series->d_func()->categorySum(category);
        qreal percentage = (100 / colSum);
        qreal xPos = -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) * percentage * scaleX;
            Bar *bar = m_bars.at(itemIndex);

            QRectF rect(xPos, yPos - rectHeight, rectWidth, rectHeight);
            layout.append(rect);
            bar->setPen(barSet->m_pen);
            bar->setBrush(barSet->m_brush);
            if (qFuzzyIsNull(rectHeight))
                bar->setVisible(false);
            else
                bar->setVisible(barsVisible);

            QGraphicsSimpleTextItem *label = m_labels.at(itemIndex);

            if (!qFuzzyIsNull(m_series->d_func()->valueAt(set, category))) {
                int p = m_series->d_func()->percentageAt(set, category) * 100;
                QString vString(QString::number(p));
                vString.truncate(3);
                vString.append("%");
                label->setText(vString);
            } else {
                label->setText(QString(""));
            }

            label->setPos(xPos + (rect.width() / 2 - label->boundingRect().width() / 2),
                          yPos - rectHeight / 2 - label->boundingRect().height() / 2);
            label->setFont(barSet->m_labelFont);
            label->setBrush(barSet->m_labelBrush);

            itemIndex++;
            xPos += rectWidth;
        }
    }
    return layout;
}

#include "moc_horizontalpercentbarchartitem_p.cpp"

QTCOMMERCIALCHART_END_NAMESPACE