#include "gtl_gui_chart_marker_line.h"

namespace gtl
{
    namespace gui
    {
        chart_marker_line::chart_marker_line(::chart::series::series *parent, int idx, bool is_label_visible, Qt::Orientation orientation)
            : chart_line(parent, orientation)
            , _width(15)
            , _idx(idx)
            , _is_label_visible(is_label_visible)
        {
            setZValue(1);
        }

        void chart_marker_line::set_idx(int idx)
        {
            prepareGeometryChange();

            _idx = idx;
        }

        int chart_marker_line::idx() const
        {
            return _idx;
        }

        void chart_marker_line::set_label_visible(bool value)
        {
            prepareGeometryChange();
            _is_label_visible = value;
        }

        void chart_marker_line::set_label(QString label)
        {
            prepareGeometryChange();
            _lbl_rect.setWidth(100);
            _label = label;
        }

        QRectF chart_marker_line::boundingRect() const
        {
            QRectF rect = chart::instrument::primitive::line::boundingRect();

            QRectF lbl_rect = _lbl_rect;

            if(_orientation == Qt::Vertical)
            {
                if(rect.center().x() - lbl_rect.width() - 3 > 0)
                    lbl_rect.moveTo(rect.center().x() - lbl_rect.width() - 3, rect.top());
                else
                    lbl_rect.moveTo(rect.center().x() + 3, rect.top());

                return QRectF(rect.center().x() - _width / 2, rect.top(), _width, rect.height()).united(lbl_rect);
            }
            else
            {
                if(rect.center().y() - lbl_rect.height() - 3 > 0)
                    lbl_rect.moveTo(rect.right() - lbl_rect.width() - 3, rect.center().y() - lbl_rect.height() - 3);
                else
                    lbl_rect.moveTo(rect.right() - lbl_rect.width() - 3, rect.center().y() + 3);

                return QRectF(rect.left(), rect.center().y() - _width / 2, rect.width(), _width).united(lbl_rect);
            }
        }

        void chart_marker_line::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
        {
            ::chart::instrument::primitive::line::paint(painter, option, widget);

            if(_is_label_visible)
            {

                QString lbl = _label;
                if(_label.isEmpty())
                    lbl = QString::number(_idx + 1);

                QRectF rect = /*boundingRect()*/chart::instrument::primitive::line::boundingRect();
                _lbl_rect = painter->fontMetrics().boundingRect(lbl);

                if(_orientation == Qt::Vertical)
                {
                    if(rect.center().x() - _lbl_rect.width() - 3 > 0)
                        _lbl_rect.moveTo(rect.center().x() - _lbl_rect.width() - 3, rect.top());
                    else
                        _lbl_rect.moveTo(rect.center().x() + 3, rect.top());
                }
                else
                {
                    if(rect.center().y() - _lbl_rect.height() - 3 > 0)
                        _lbl_rect.moveTo(rect.right() - _lbl_rect.width() - 3, rect.center().y() - _lbl_rect.height() - 3);
                    else
                        _lbl_rect.moveTo(rect.right() - _lbl_rect.width() - 3, rect.center().y() + 3);
                }

                painter->drawText(_lbl_rect, Qt::AlignCenter, lbl);
            }

            qreal dx = _width / 2.0;
            qreal dy = _width / 2.0;

            QVariantList data;
            emit get_series_data(pos(), true, data);

            for(int i = 0;i < data.size(); i += 2)
            {
                if(data[i].toDouble() == qQNaN())
                    continue;

                qreal y = /*_series->axis_y()->map_to_widget(*/data[i].toDouble()/*)*/;
                qreal x = _series->axis_x()->map_to_widget(pos());

                painter->setPen(QPen(data[i + 1].value<QColor>(), 0));
                painter->drawLine((QPointF(x - dx, y - dy)), (QPointF(x + dx, y + dy)));
                painter->drawLine((QPointF(x - dx, y + dy)), (QPointF(x + dx, y - dy)));
            }
        }
    }
}