This program, in particular, has no need for any pointers of any kind. They are all better done as simple value objects. I have verified this by deleting "#inc

This program, in particular, has no need for any pointers of any kind. They are all better done as simple value objects. I have verified this by deleting "#include memory>", all uses of shared_ptr, changing all "->" to ".", and deleting all unary "*". The window member object is initialized, then, using (drumroll...) member initializer syntax. Most uses of "{}" are better deleted.