Question

I have some simple app, that I have implemented with design patterns. On the way I have implemented it using MVC separation.

I have View – MainForm class, Controller – MainController class.

Controller is a singleton, so MainForm accesses it when it needs to.
MainController has as a IMainFormView interface as a composition.

MainForm class implements IMainFormView.

So, when user clicks some button, then MainForm passes some request to MainController, that computes something and performs callback on IMainFormView member to update the MainForm.

Is there Visitor pattern: IMainFormView- IVisitor and MainForm – Visitor?

Answer 1

I sense a Strategy Pattern here. A strategy pattern lets you select a particular algorithm, which in your case is an implementation IMainFormView, at runtime.