c++ - Qt: Subclassed spinbox does not count -

i try subclass qt spinbox can mouse event. code compiles, events working, spinbox doesn't count or down. have set min value -9999 , max value 9999, default value 100. if click 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 = 0;         i++;     } }  void newspinbox::mousereleaseevent(qmouseevent *mouseevent) {     if(mouseevent->type() == qmouseevent::mousebuttonrelease)     {         int = 0;         i++;     } } 

do have reimplement count functions?

you must call base class handler default behavior:

void newspinbox::mousepressevent(qmouseevent *mouseevent) {     qspinbox::mousepressevent(mouseevent);     // ... code }  void newspinbox::mousereleaseevent(qmouseevent *mouseevent) {     qspinbox::mousereleaseevent(mouseevent);     // ... code }