Using Qt signals and slots with multiple inheritance

Question

I have a class (MyClass) that inherits most of its functionality from a Qt built-in object (QGraphicsTextItem). QGraphicsTextItem inhe

Answer 1

You can declare MyInterface that takes a QObject in its constructor:

class MyInterface {
public:
                MyInterface(QObject * object);
    QObject *   object() { return m_object; }
    ...
private:
    QObject *   m_object;
};

MyInterface::MyInterface(QObject * object) :
    m_object(object)
{
    ...
}

Then in MyClass constructor:

MyClass::MyClass() :
MyInterface(this)
{
    ...
}

And you can connect the signal:

MyInterface *my_interface_instance = GetInstance();
connect(my_interface_instance->object(), SIGNAL(MyInterfaceSignal()), this, SLOT(TempSlot()));