#include "myrealtimeplot.h"

#include <QDebug>



MyRealTimePlot::MyRealTimePlot(QCustomPlot *parent) :
    QCustomPlot(parent)
{

    QCustomPlot*customPlot=this;

    customPlot->addGraph(); // blue line
    customPlot->graph(0)->setPen(QPen(Qt::blue));
    customPlot->graph(0)->setBrush(QBrush(QColor(240, 255, 200,180)));
    customPlot->graph(0)->setAntialiasedFill(false);
    customPlot->graph(0)->setChannelFillGraph(0);

    customPlot->addGraph(); // red line
    customPlot->graph(1)->setPen(QPen(Qt::red));
    customPlot->graph(1)->setBrush(QBrush(QColor(204, 232, 207,180)));
    customPlot->graph(1)->setChannelFillGraph(0);


    customPlot->addGraph(); // blue dot
    customPlot->graph(2)->setPen(QPen(Qt::blue));
    customPlot->graph(2)->setLineStyle(QCPGraph::lsNone);
    customPlot->graph(2)->setScatterStyle(QCPScatterStyle::ssDisc);
    customPlot->addGraph(); // red dot
    customPlot->graph(3)->setPen(QPen(Qt::red));
    customPlot->graph(3)->setLineStyle(QCPGraph::lsNone);
    customPlot->graph(3)->setScatterStyle(QCPScatterStyle::ssDisc);


    customPlot->xAxis->setTickLabelType(QCPAxis::ltDateTime);
    customPlot->xAxis->setDateTimeFormat("hh:mm:ss");
    customPlot->xAxis->setAutoTickStep(false);
    customPlot->xAxis->setTickStep(2);
    customPlot->axisRect()->setupFullAxesBox();

    // make left and bottom axes transfer their ranges to right and top axes:
    connect(customPlot->xAxis, SIGNAL(rangeChanged(QCPRange)), customPlot->xAxis2, SLOT(setRange(QCPRange)));
    connect(customPlot->yAxis, SIGNAL(rangeChanged(QCPRange)), customPlot->yAxis2, SLOT(setRange(QCPRange)));



    // setup a timer that repeatedly calls MainWindow::realtimeDataSlot:
    connect(&dataTimer, SIGNAL(timeout()), this, SLOT(realtimeDataSlot()));
    dataTimer.start(0); // Interval 0 means to refresh as fast as possible

}

void MyRealTimePlot::realtimeDataSlot()
{

    QCustomPlot*customPlot=this;

    // calculate two new data points:
    double key = QDateTime::currentDateTime().toMSecsSinceEpoch()/1000.0;
    static double lastPointKey = 0;
    if (key-lastPointKey > 0.01) // at most add point every 10 ms
    {
        double value0 = qSin(key); //qSin(key*1.6+qCos(key*1.7)*2)*10 + qSin(key*1.2+0.56)*20 + 26;
        double value1 = qCos(key); //qSin(key*1.3+qCos(key*1.2)*1.2)*7 + qSin(key*0.9+0.26)*24 + 26;
        // add data to lines:
        customPlot->graph(0)->addData(key, value0);
        customPlot->graph(1)->addData(key, value1);
        // set data of dots:
        customPlot->graph(2)->clearData();
        customPlot->graph(2)->addData(key, value0);
        customPlot->graph(3)->clearData();
        customPlot->graph(3)->addData(key, value1);
        // remove data of lines that's outside visible range:
        customPlot->graph(0)->removeDataBefore(key-8);
        customPlot->graph(1)->removeDataBefore(key-8);
        // rescale value (vertical) axis to fit the current data:
        customPlot->graph(0)->rescaleValueAxis();
        customPlot->graph(1)->rescaleValueAxis(true);
        lastPointKey = key;
    }
    // make key axis range scroll with the data (at a constant range size of 8):
    customPlot->xAxis->setRange(key+0.25, 8, Qt::AlignRight);
    customPlot->replot();

    // calculate frames per second:
    static double lastFpsKey;
    static int frameCount;
    ++frameCount;


    if (key-lastFpsKey > 2) // average fps over 2 seconds
    {

        QString fps= QString("%1 FPS, Total Data points: %2")
                .arg(frameCount/(key-lastFpsKey), 0, 'f', 0)
                .arg(customPlot->graph(0)->data()->count()+customPlot->graph(1)->data()->count());

        qDebug()<<fps;

        lastFpsKey = key;
        frameCount = 0;
    }
}