QCustomPlot Discussion and Comments

Hello. I am learning C++ and working with QCustomPlot. I have read this:
https://www.qcustomplot.com/index.php/support/forum/1887

and thought its quite interesting. Unfortunately the post above does not contain complete solution and does not show how to actually override the require methods.

In my mainwindow.cpp I have setup the very basic example:

// generate some data:
    QVector<double> x(101), y(101); // initialize with entries 0..100
    for (int i=0; i<101; ++i)
    {
      x[i] = i/50.0 - 1; // x goes from -1 to 1
      y[i] = x[i]*x[i]; // let's plot a quadratic function
    }
    // create graph and assign data to it:
    ui->customPlot->addGraph();
    ui->customPlot->graph(0)->setData(x, y);
    // give the axes some labels:
    ui->customPlot->xAxis->setLabel("x");
    ui->customPlot->yAxis->setLabel("y");
    // set axes ranges, so we see all data:
    ui->customPlot->xAxis->setRange(-1, 1);
    ui->customPlot->yAxis->setRange(0, 1);
    ui->customPlot->replot();

    ui->customPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom | QCP::iSelectPlottables | QCP::iMultiSelect);

    foreach (QCPAxisRect *rect, ui->customPlot->axisRects())
    {
        rect->setRangeDrag(Qt::Horizontal);
        rect->setRangeZoom(Qt::Horizontal);
    }

To override the methods, I have created a custom class named QMyPlot.
See the QMyPlot.h:

#ifndef QMYPLOT_H
#define QMYPLOT_H

#include "qcustomplot.h"

class QMyPlot : public QCPAxisRect
{
public:
    QMyPlot(QCustomPlot *parentPlot);
    void mousePressEvent(QMouseEvent *event, const QVariant &details) override;


};



#endif // QMYPLOT_H

See my QMyPlot.cpp:

#include "qmyplot.h"

QMyPlot::QMyPlot(QCustomPlot *parentPlot):QCPAxisRect(parentPlot,true)

{

}

void QMyPlot::mousePressEvent(QMouseEvent *event, const QVariant &details)
{

    if (event->button() == Qt::RightButton)
    {
        qDebug("Right mouse Press Event\n");
    }
    else
    {
        qDebug("Left mouse Press Event\n");
        QCPAxisRect::mousePressEvent(event,details);
    }

}

As you can see, I have overridden the mousePressEvent but I do not actually understand how can I use this overridden method?

Could someone suggest what functions do I need to replace in my MainWindow.cpp to get this method to work?