home *** CD-ROM | disk | FTP | other *** search
- /*+==========================================================================
- File: BALL.H
-
- Summary: Include file for the aggregatable COBall COM object class.
-
- COBall offers a main standard IUnknown interface (basic COM
- object features) and the custom IBall interface (moving
- ball-related features). This multiple interface COM Object
- Class is achieved via the technique of nested classes. The
- implementation of the IBall interface is nested inside of the
- COBall Class.
-
- This file also declares some internal C++ classes (CXForm and
- CBallThread) that provide internal support for the custom
- IBall interface.
-
- For a comprehensive tutorial code tour of this module's
- contents and offerings see the accompanying FRESERVE.TXT file.
- For more specific technical details on the internal workings
- see the comments dispersed throughout the module's source code.
-
- Functions:
-
- Classes: CXForm, CBallThread, COBall.
-
- Origin: 4-5-96: atrent - Editor-inheritance from CAR.H in
- the DLLSERVE OLE Tutorial Code Sample. Also borrows from
- the GDIDEMO sample in the Win32 samples of the Win32 SDK.
-
- ----------------------------------------------------------------------------
- This file is part of the Microsoft OLE Tutorial Code Samples.
-
- Copyright (C) Microsoft Corporation, 1996. All rights reserved.
-
- This source code is intended only as a supplement to Microsoft
- Development Tools and/or on-line documentation. See these other
- materials for detailed information regarding Microsoft code samples.
-
- THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
- KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
- IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
- PARTICULAR PURPOSE.
- ==========================================================================+*/
-
- #if !defined(BALL_H)
- #define BALL_H
-
- #ifdef __cplusplus
-
- enum { MAX_BALLTHREADS = 64, BALL_MOVE_SKEW = 5 };
-
-
- /*C+C+++C+++C+++C+++C+++C+++C+++C+++C+++C+++C+++C+++C+++C+++C+++C+++C+++C+++C
- Class: CXForm
-
- Summary: A utility class with methods for performing point
- transformations on points that represent space/location in two
- dimensions.
-
- Methods: Clear
- Clears the transformation matrix.
- Scale
- Set transformation to multiply by a scale factor.
- Trans
- Perform transformation.
- Point
- Get point.
- CXForm
- Constructor.
- ~CXForm
- Destructor.
- C---C---C---C---C---C---C---C---C---C---C---C---C---C---C---C---C---C---C-C*/
- class CXForm
- {
- private:
- int XForm[3][3];
-
- public:
- CXForm(void) {};
- ~CXForm(void) {};
- void Clear(void);
- void Scale(int xScale, int yScale);
- void Trans(int xTrans, int yTrans);
- void Point(POINT* pPoint);
- };
-
-
- /*C+C+++C+++C+++C+++C+++C+++C+++C+++C+++C+++C+++C+++C+++C+++C+++C+++C+++C+++C
- Class: CBallThread
-
- Summary: A class for simple objects used to store properties of threads.
- An array of these is used to remember the threads that came
- visiting the CBall object.
-
- Methods: CBallThread
- Constructor.
- ~CBallThread
- Destructor.
- C---C---C---C---C---C---C---C---C---C---C---C---C---C---C---C---C---C---C-C*/
- class CBallThread
- {
- public:
- DWORD Id;
- COLORREF Color;
-
- CBallThread(void) {};
- ~CBallThread(void) {};
- };
-
-
- /*O+O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O
- ObjectClass: COBall
-
- Summary: COM object class for COBall COM objects. COM objects of
- this class offer IBall interface features, Reset, Move, and
- GetBall. The mulitple interfaces on this COM object are
- constructed via the nested interface classes technique.
-
- Interfaces: IUnknown
- Standard interface providing COM object features.
- IBall
- Basic Ball operation features.
-
- Aggregation: Yes, COBall COM Objects are aggregatable by passing
- a non-NULL pUnkOuter IUnknown pointer into the constructor.
- O---O---O---O---O---O---O---O---O---O---O---O---O---O---O---O---O---O---O-O*/
- class COBall : public IUnknown, public CThreaded
- {
- public:
- // Main Object Constructor & Destructor.
- COBall(IUnknown* pUnkOuter, CServer* pServer);
- ~COBall(void);
-
- // IUnknown methods. Main object, non-delegating.
- STDMETHODIMP QueryInterface(REFIID, PPVOID);
- STDMETHODIMP_(ULONG) AddRef(void);
- STDMETHODIMP_(ULONG) Release(void);
-
- private:
- // We declare nested class interface implementations here.
-
- class CImpIBall : public IBall, public CThreaded
- {
- public:
- // Interface Implementation Constructor & Destructor.
- CImpIBall(COBall* pBackObj, IUnknown* pUnkOuter);
- ~CImpIBall(void);
-
- // IUnknown methods.
- STDMETHODIMP QueryInterface(REFIID, PPVOID);
- STDMETHODIMP_(ULONG) AddRef(void);
- STDMETHODIMP_(ULONG) Release(void);
-
- // IBall methods.
- STDMETHODIMP Reset(RECT* pNewRect, short nBallSize);
- STDMETHODIMP get_Ball(POINT* pOrg, POINT* pExt, COLORREF* pcrColor);
- STDMETHODIMP Move(BOOL bAlive, BOOL* bRet);
-
- private:
- // Data private to this COBall interface implementation of IBall.
- COBall* m_pBackObj; // Parent Object back pointer.
- IUnknown* m_pUnkOuter; // Outer unknown for Delegation.
-
- // The following private data and methods constitute the working
- // heart of COBall as an actual application object.
- BOOL m_bAlive;
- RECT m_WinRect;
- int m_nWidth;
- int m_nHeight;
- int m_xDirection;
- int m_yDirection;
- BOOL m_bNewPosition;
- int m_xPosition;
- int m_yPosition;
- short m_xSkew;
- short m_ySkew;
- COLORREF m_crColor;
- CXForm m_XForm;
- CBallThread m_aBallThreads[MAX_BALLTHREADS];
-
- // Private methods for internal use.
- void GetDimensions(POINT*);
- void SetDimensions(int,int);
- void GetDirection(POINT*);
- void SetDirection(int,int);
- void GetPosition(POINT*);
- void SetPosition(int,int);
- void CheckBounce(void);
- void FindThread(void);
- };
-
- // Make the otherwise private and nested IBall interface implementation
- // a friend to COM object instantiations of this selfsame COBall
- // COM object class.
- friend CImpIBall;
-
- // Private data of COBall COM objects.
-
- // Nested IBall implementation instantiation. This IBall interface
- // is instantiated inside this COBall object as a native interface.
- CImpIBall m_ImpIBall;
-
- // Main Object reference count.
- ULONG m_cRefs;
-
- // Outer unknown (aggregation & delegation).
- IUnknown* m_pUnkOuter;
-
- // Pointer to this component server's control object.
- CServer* m_pServer;
- };
-
- typedef COBall* PCOBall;
-
- #endif // __cplusplus
-
-
- #endif // BALL_H
-