movetothread is in accessible

Question

I have the following class:

class commMonitor : QObject
{
    Q_OBJECT
public:
    commMonitor();
    ~commMonitor();
private:
    QMap<unsigned short int, QTimer*> Monitors;
    QTimer* currTimer;
public slots:
    void createMonitor(unsigned short int);
    void deleteMonitor(unsigned short int);
    void startMonitor(unsigned short int);
    void stopMonitor(unsigned short int);

};

when I tried to do the following:

commMonitor* commOverWatch = new commMonitor();
QThread* monitorThread = new QThread();
commOverWatch->moveToThread(monitorThread);

the visual studio won't compile, and the error is the QObject::moveToThread is inaccessible.

What's going wrong here?

Answer 1

In C++ class commMonitor : QObject means private inheritance (by default), so you can't use public members in your case. I hope you are familiar with inheritance rules. If no, see this question. As you can see, in your case, moveToThread() is a private method and of course you can't access it outside the class.

Solution: specify public inheritance explicitly:

class commMonitor : public QObject
{
    Q_OBJECT
public:
    commMonitor();
    ~commMonitor();
private:
    QMap<unsigned short int, QTimer*> Monitors;
    QTimer* currTimer;
public slots:
    void createMonitor(unsigned short int);
    void deleteMonitor(unsigned short int);
    void startMonitor(unsigned short int);
    void stopMonitor(unsigned short int);

};