Qt: Subclassed spinbox does not count - c++

Question

I try to subclass a Qt spinbox so i can get the mouse event. The code compiles, the events are working, but the spinbox doesn't count up or down. I have set the min value to -9999 and max value to 9999, default value is 100. But if i click the up or down button, nothing happens.
NewSpinBox.h:
#ifndef NEWSPINBOX_H
#define NEWSPINBOX_H
#include <QObject>
#include <QWidget>
#include <QEvent>
#include <QMouseEvent>
#include <QSpinBox>
class NewSpinBox : public QSpinBox
{
Q_OBJECT
public:
NewSpinBox(QWidget *parent = 0);
~NewSpinBox();
public slots:
void mousePressEvent(QMouseEvent *mouseEvent);
void mouseReleaseEvent(QMouseEvent *mouseEvent);
};
#endif // NEWSPINBOX_H
NewSpinBox.cpp:
#include "newspinbox.h"
NewSpinBox::NewSpinBox(QWidget *parent) : QSpinBox(parent)
{
}
NewSpinBox::~NewSpinBox()
{
}
void NewSpinBox::mousePressEvent(QMouseEvent *mouseEvent)
{
if(mouseEvent->type() == QMouseEvent::MouseButtonRelease)
{
int i = 0;
i++;
}
}
void NewSpinBox::mouseReleaseEvent(QMouseEvent *mouseEvent)
{
if(mouseEvent->type() == QMouseEvent::MouseButtonRelease)
{
int i = 0;
i++;
}
}
Do I have to reimplement the count functions?

Answer 1

You must call the base class handler to get the default behavior:
void NewSpinBox::mousePressEvent(QMouseEvent *mouseEvent)
{
QSpinBox::mousePressEvent(mouseEvent);
// ... your code
}
void NewSpinBox::mouseReleaseEvent(QMouseEvent *mouseEvent)
{
QSpinBox::mouseReleaseEvent(mouseEvent);
// ... your code
}