Getting a function to call another function

[bmn]

Hello everyone
I'm trying to get a function to call another function from the same class
this is the function i want called:

void MainWindow::locationUpdated(QGeoPositionInfo currentPosition) {
    //Defines a geographical position on the surface of the Earth
    QGeoCoordinate geoCoordinate = currentPosition.coordinate();
 
    //Declares latitude and longitude
  qreal latitude = geoCoordinate.latitude();
  qreal longitude = geoCoordinate.longitude();
 
    //Replaces the textlabels with longitude and latitude values
   ui->latitudeOutputLabel->setText(QString::number(latitude));
   ui->longitudeOutputLabel->setText(QString::number(longitude));
   ui->areaLabel->setText(currentPosition.coordinate().toString(QGeoCoordinate::DegreesMinutesWithHemisphere));
};

void MainWindow::locationUpdated(QGeoPositionInfo currentPosition) {
    //Defines a geographical position on the surface of the Earth
    QGeoCoordinate geoCoordinate = currentPosition.coordinate();

    //Declares latitude and longitude
  qreal latitude = geoCoordinate.latitude();
  qreal longitude = geoCoordinate.longitude();

    //Replaces the textlabels with longitude and latitude values
   ui->latitudeOutputLabel->setText(QString::number(latitude));
   ui->longitudeOutputLabel->setText(QString::number(longitude));
   ui->areaLabel->setText(currentPosition.coordinate().toString(QGeoCoordinate::DegreesMinutesWithHemisphere));
};

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and i want it called from, so that i dont have to find the coordinates again in this function:

void MainWindow::calcMax() {
 
    //gives maximum values of latitude and longitude
 //   geoCoordinate.setLatitude(geoCoordinate.latitude()+2);
//    geoCoordinate.setLongitude(geoCoordinate.longitude()+2);
 //  ui->maxLabel->setText(geoCoordinate.toString(QGeoCoordinate::DegreesMinutesWithHemisphere));
 
};

void MainWindow::calcMax() {

    //gives maximum values of latitude and longitude
 //   geoCoordinate.setLatitude(geoCoordinate.latitude()+2);
//    geoCoordinate.setLongitude(geoCoordinate.longitude()+2);
 //  ui->maxLabel->setText(geoCoordinate.toString(QGeoCoordinate::DegreesMinutesWithHemisphere));

};

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Header:

class MainWindow : public QMainWindow
{
    Q_OBJECT
 
public slots:
    void locationUpdated(QGeoPositionInfo);
    void calcMax();
    void calcMin();
 
 
public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();
 
private:
    Ui::MainWindow *ui;
    QGeoPositionInfoSource* m_source;

class MainWindow : public QMainWindow
{
    Q_OBJECT

public slots:
    void locationUpdated(QGeoPositionInfo);
    void calcMax();
    void calcMin();


public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

private:
    Ui::MainWindow *ui;
    QGeoPositionInfoSource* m_source;

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Im pretty clueless at this point any help is welcome