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MFC Workshop: Intro to MFC

MFC Workshop: Intro to MFC. What is MFC?. Microsoft Foundation Classes C++ wrappers to the Windows SDK An application framework A useful set of extensions. MFC. SDK. Windows. Why MFC?. Eliminates a lot of the monotony of Windows programming. Written in C++ Code reuse saves time

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MFC Workshop: Intro to MFC

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  1. MFC Workshop: Intro to MFC

  2. What is MFC? • Microsoft Foundation Classes • C++ wrappers to the Windows SDK • An application framework • A useful set of extensions MFC SDK Windows

  3. Why MFC? • Eliminates a lot of the monotony of Windows programming. • Written in C++ • Code reuse saves time • Relatively easy for C++ programmers to pick up • Most Windows objects act like C++ objects in MFC • Small amount of overhead for a class library • You can still access the SDK. • Cross-platform (sort of)

  4. How to use MFC • Derive the from classes to add functionality. • Override base class members. • Add new members. • Some classes can be used directly.

  5. The one and only CWinApp • Derived from CObject->CCmdTarget->CWinThread. • CObject: serialization and runtime information • CCmdTarget: allows message handling • CWinThread: allow multithreading, the CWinApp object is the primary thread • Derive one class, and declare one instance per application. • Encompasses WinMain(), message pump, etc.

  6. CWnd and CFrameWnd • Holds an HWND and all of the functions associated with it. • Hides the WndProc() and handles message routing. • CWnd is the base class for everything from CButton to CFrameWnd. • CFrameWnd is the class used as the main window in most applications.

  7. Message Handling • In MFC the message pump and WndProc are hidden by a set of macros. • MFC messaging acts virtually without the overhead. • To add message routing put the following line in the class declaration, DECLARE_MESSAGE_MAP(). • For every message you want to handle you have to add an entry to the message map.

  8. CDC and CPaintDC • MFC device context classes. • Holds a device context handle, and wraps the SDK DC functions. • CPaintDC is used when responding to WM_PAINT messages. • CPaintDC encapsulates calls to BeginPaint and EndPaint in the constructor and destructor respectively.

  9. Simple types and GDI classes • MFC does a very simple encapsulation of structures like RECT and POINT with classes like CRect and CPoint. • One of the most useful classes in MFC is CString. • Similar to a character array, with a handful of useful methods • All of the GDI structures have their own classes • creation and destruction is handled by C++ • can be used freely with the old structures

  10. MFC References • Programming Windows With MFC • Jeff Prosise • Professional MFC with Visual C++ • Mike Blaszczak • MFC Internals • George Shepherd and Scot Wingo • http://www.codeguru.com • news: microsoft.public.vc.mfc • MSDN Library • The code itself, \VC98\Mfc\Src

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