#include "MCustomPlot.h"

MCustomPlot::MCustomPlot(QWidget *parent)
    :QCustomPlot(parent)
    ,m_isShowTracer(false)
    ,m_xTracer(Q_NULLPTR)
    ,m_yTracer(Q_NULLPTR)
//    ,m_dataTracers(QList<MTracer *>())
    ,m_lineTracer(Q_NULLPTR)
{
}

void MCustomPlot::mouseMoveEvent(QMouseEvent *event)
{
    QCustomPlot::mouseMoveEvent(event);

    if(m_isShowTracer)
    {
        //当前鼠标位置（像素坐标）
        int x_pos = event->pos().x();
        int y_pos = event->pos().y();

        //像素坐标转成实际的x,y轴的坐标
        float x_val = this->xAxis->pixelToCoord(x_pos);
        float y_val = this->yAxis->pixelToCoord(y_pos);

        if(Q_NULLPTR == m_xTracer)
            m_xTracer = new MTracer(this, MTracer::XAxisTracer);//x轴
        m_xTracer->updatePosition(x_val, y_val);

        if(Q_NULLPTR == m_yTracer)
            m_yTracer = new MTracer(this, MTracer::YAxisTracer);//y轴
        m_yTracer->updatePosition(x_val, y_val);

        if(Q_NULLPTR == m_lineTracer)
            m_lineTracer = new MTraceLine(this,MTraceLine::Both);//直线
        m_lineTracer->updatePosition(x_val, y_val);

       int nCurveCount = this->plottableCount();

/*
        for (int i = 0; i< nCurveCount; ++i)
        {
            MTracer *tracer = new MTracer(this, MTracer::DataTracer);
            tracer->setVisible(true);
            tracer->setPen(this->plottable(i)->pen());
            tracer->setBrush(Qt::NoBrush);
            if(this->plottable(i)->name() != "" && this->plottable(i)->name() != "")
            {
                QCPGraph * pgraph = (QCPGraph *) this->plottable(i);
                QCPPlottableLegendItem * item = this->legend->itemWithPlottable(pgraph);

                MTracer *tracer = new MTracer(this, MTracer::DataTracer);
                tracer->setVisible(true);
                tracer->setPen(this->plottable(i)->pen());
                tracer->setBrush(Qt::NoBrush);
                tracer->m_tracer->setGraph(pgraph);
                tracer->m_tracer->setGraphKey(x_val);
                tracer->m_tracer->setInterpolating(false);

                tracer->setLabelPen(this->plottable(i)->pen());

                auto iter = this->plottable(i)->interface1D()->findBegin(x_val);
                auto yiter = this->plottable(i)->interface1D()->dataMainValue(iter);
                auto xiter = this->plottable(i)->interface1D()->dataMainKey(iter);
                tracer->updatePosition(x_val, y_val);
                tracer->m_label->setText(QString("x:%1,y:%2,t:%3,k:%4,v:%5").arg(x_val).arg(y_val).arg(iter).arg(xiter).arg(yiter));

                if(item->selected() || pgraph->selected())
                {
                    item->setSelected(true);
                    QPen pen;
                    pen.setWidth(10);
                    pen.setColor(Qt::blue);
                    pgraph->selectionDecorator()->setPen(pen);
                    qDebug()<<QString("selected");
                    pgraph->setSelection(QCPDataSelection(pgraph->data()->dataRange()));

                }
                tracer->deleteLater();
            }else if(0){
                //显示curve曲线

                //获取实部y轴的显示范围
//                double y_range = (this->yAxis->range().size()) / 50;
//                double x_range = (this->xAxis->range().size()) / 50;
                int pointCount = this->plottable(i)->interface1D()->dataCount(); //曲线上所有数据点个数
                if(pointCount)
                {
                    double x,y;
                    double xNearlest = 999;
                    double yNearlest = 999;
                    double xDistance;
                    double yDistance;
                    double xTmp = 999;
                    double yTmp = 999;
                    int t_index;
                    for(int j =0; j < pointCount; j++)
                    {
                        double nearindex = this->plottable(i)->interface1D()->findBegin(j);
                        double x_line = this->plottable(i)->interface1D()->dataMainKey(nearindex);
                        double y_line = this->plottable(i)->interface1D()->dataMainValue(nearindex);
                        xDistance = abs(x_val - x_line);
                        yDistance = abs(y_val - y_line);
                        if( xDistance <= xTmp && yDistance <= yTmp)
                        {
                            t_index = nearindex;
                            xTmp = xDistance;
                            yTmp = yDistance;
                            xNearlest = x_line;
                            yNearlest = y_line;
                        }
                    }
                    MTracer *tracer = new MTracer(this, MTracer::DataTracer);
                    tracer->setVisible(true);
                    tracer->setPen(this->plottable(i)->pen());
                    tracer->setBrush(Qt::NoBrush);
                    tracer->updatePosition(xNearlest, yNearlest);
                    tracer->deleteLater();
                }

            }
        }
*/
        this->replot();//曲线重绘
    }
}