getting the coordinate value of points in Qchartview

[seok]

hello
how to get the values of x and y in Qt chartview when i move the mouse on the point

here is the code

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    series = new QScatterSeries();

    series->append(0,0);
    series->append(1,3);
    series->append(3,4);
    series->append(5,7);


    chart = new QChart();
    chart->addSeries(series);
    chart->setTitle("chart");
    chart->createDefaultAxes();

    chart->legend()->hide();
    chart->legend()->setAlignment(Qt::AlignTop);

    chartview = new  QChartView(chart);
    chartview->setRenderHint(QPainter::Antialiasing);
    //chartview->setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
    chartview->setParent(this);

    chartview->setRubberBand(QChartView::RectangleRubberBand);

}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_pushButton_clicked()
{
    chart->zoomIn();
}


void MainWindow::on_pushButton_2_clicked()
{
    chart->zoomOut();
}


void MainWindow::on_pushButton_3_clicked()
{
    chart->zoomReset();
}

please suggest a way to do this thanks in advance