#include "axisitem_p.h"
#include <QPainter>
#include <QDebug>

QTCOMMERCIALCHART_BEGIN_NAMESPACE

AxisItem::AxisItem(AxisType type,QGraphicsItem* parent): ChartItem(parent),
m_ticks(4),
m_type(type)
{
}

AxisItem::~AxisItem()
{
}

void  AxisItem::setSize(const QSize& size)
{
    m_rect = QRectF(QPoint(0,0),size);
}

void AxisItem::setLength(int length)
{
    QPainterPath path;
    path.moveTo(QPointF(0,0));
    path.lineTo(length,0);
   // path.lineTo(length-4,0);
   // path.lineTo(length,3);
   // path.lineTo(length-4,6);
   // path.lineTo(length-4,4);
   // path.lineTo(0,4);
   // path.lineTo(0,2);
    m_path=path;
    update();
}

QRectF AxisItem::boundingRect() const
{
    return m_rect;
}

void AxisItem::setPlotDomain(const PlotDomain& plotDomain)
{
    m_plotDomain = plotDomain;
}

void AxisItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,QWidget *widget)
{
    if (!m_rect.isValid())
      return;

    if(m_type==X_AXIS) {

      const qreal deltaX = (m_rect.width() -1) / m_ticks;

      for (int i = 0; i <= m_ticks; ++i) {

          int x = i * deltaX + m_rect.left();
          qreal label = m_plotDomain.m_minX + (i * m_plotDomain.spanX()
              / m_ticks);
          painter->drawLine(x, m_rect.top()+1, x, m_rect.bottom());
          //painter->drawLine(x, m_rect.bottom(), x, m_rect.bottom() + 5);

          painter->drawText(x - 50, m_rect.bottom() + 5, 100, 20,
              Qt::AlignHCenter | Qt::AlignTop,
              QString::number(label));
      }
    }

    if(m_type==Y_AXIS) {

      const qreal deltaY = (m_rect.height() - 1) / m_ticks;

      for (int j = 0; j <= m_ticks; ++j) {

          int y = j * -deltaY + m_rect.bottom();
          qreal label = m_plotDomain.m_minY + (j * m_plotDomain.spanY()
              / m_ticks);

          painter->drawLine(m_rect.left(), y, m_rect.right()-1, y);
          //painter->drawLine(m_rect.left() - 5, y, m_rect.left(), y);
          //TODO : margin = 50 ;
          painter->drawText(m_rect.left() - 50, y - 10, 50 - 5, 20,
              Qt::AlignRight | Qt::AlignVCenter,
              QString::number(label));
      }
    }

    //painter->drawRect(m_rect.adjusted(0, 0, -1, -1));

}

//TODO "nice numbers algorithm"

QTCOMMERCIALCHART_END_NAMESPACE