Having trouble creating a class based implementation of OpenCV's mouseCallback function

Question

As the title suggest, I\'m having some trouble implementing OpenCV\'s mouseCallback function in a class based C++ structure. Allow me to explain. I have defined a class called B

Answer 1

I was using this method too, however I realized that the static helper class was quite rigid and type and method bound.

Just for further reference I've defined a templated free function that looks like:

template
void FreeOnMouseCallback(int event, int x, int y, int flags, void* ptr)
{
    auto* mcPtr = static_cast(ptr);
    if(mcPtr != NULL)
    {
      (mcPtr->*MouseClickType)(event, x, y, flags);
    }
}

And I can now call arbitrary functions (matching the signature, but not the name) inside classes with

 cv::setMouseCallback( WindowName, FreeOnMouseCallback, this );

It might be extended if the void* ptr is also required, but I've omitted it here.