Problems accessing static member variable from static member function

Hi,

You can try a different solution.
Let's see it is easy and safe also.

class GetComboInstance
{
public:
static GetComboInstance* createInstance();
updateCombo();
private:
QComboBox *m_pComboBox;
static GetComboInstance *m_pInstance;
};

In Cpp file:

static GetComboInstance *GetComboInstance::m_pInstance = NULL;
static GetComboInstance* GetComboInstance::createInstance()
{
if(m_pInstance == NULL)
{
m_pInstance = new GetComboInstance();
}
return m_pInstance;
}

now you can call updateCombo method on your instance of GetComboInstance class from any class. It is better and safe way.

Please let me know what do you think

I think that when you describe the singleton pattern, you should do it right, e.g. make constructors protected or private. ;-)

http://www.inquiry.com/techtips/cpp_.../10min0200.asp