[solved]callback in Qt class

[dridk]

Hello, I have a simple question !
I m using Box2D library in my Qt application.
I need to use this function : void Query (b2QueryCallback *callback, const b2AABB &aabb)
How can I create a callback in my my C++ class ?

@

void MyClass::test()
{

}

void MyClass::explosition()
{

mWorld->query(test, aabb);

}

@

I m sure it's pretty easy.. But I never used callback function in C++ ...

EDIT: moved to C++ Gurus, as this is not Qt related..., Gerolf

[giesbert]

Hi dridk,

I don't know Box2D, but there are only 2 possibilities:

b2QueryCallback is a function definition, then you must use a function (not a member) as callback.

b2QueryCallback is a C++ interface, then you class must derive from this interface and implement it.

I googled for this name and found, "it's a class":http://programanddesign.com/box2d/classb2QueryCallback.html so just derive your C++ class from that class and implement the needed methods.

[dridk]

Ok, It was so simple! Thanks