Meshing Cocoa with C++

One of the key issues I am looking at is the problem of having a code base that is written as C++ classes and meshing that with an application framework that is written in Objective C. My rough plan at the moment is to have a parallel Objective C object for each C++ object that appears directly in the UI. So, for example, there is an C++ object in Cello that is what is called the FrameView. This is one of the central classes that appears deep through much of the cello code. My plan is to split this into two

• IMainFrame - a C++ subclass
• CHMainFrame - an Objective-C wrapper class

I don't imagine the Objective-C wrapper to be a simple wrapper. What I imagine is that it will present what is needed of the C++ class to the objective C world in doing this there will be things that make sense to be written here.