Software Engineering and Computer Games

23.10. The multiple document interface layouts

The MDI hierarchy

Now let’s say some things about taking control of the MDI. Let’s review some of the material from the Document-View section of Chapter 5: Software Design Patterns.

As the user’s interface with the program, the CView has two different roles. On the one hand, it’s the user’s channel to the program’s data. And on the other hand, the CView is a graphical Windows object that sits inside two levels of frame windows.

In terms of data, we have the hierarchy shown in Table 23.7. We include the CMainFrame here because we do sometimes keep program data in there.

Table 23.7. The application, the document, the frame, and the view in MFC.

Application class	MFC parent class	Defined in
CPopApp ...