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- /*+==========================================================================
- File: SINK.H
-
- Summary: Include file for the COBallSink COM object class.
-
- COBallSink offers a main IUnknown interface and the IBallSink
- interface (outgoing connection events from moving COBall
- objects). This multiple interface COM Object Class is
- achieved via the technique of nested classes. The
- implementation of the IBallSink interface is nested inside of
- the COBallSink Class.
-
- For a comprehensive tutorial code tour of this module's
- contents and offerings see the tutorial CONCLIEN.HTM file.
- For more specific technical details on the internal workings
- see the comments dispersed throughout the module's source code.
-
- Functions:
-
- Classes: COBallSink.
-
- Origin: 6-3-96: atrent - Editor-inheritance from BALL.H in the
- CONSERVE Tutorial Code Sample.
-
- ----------------------------------------------------------------------------
- This file is part of the Microsoft COM Tutorial Code Samples.
-
- Copyright (C) Microsoft Corporation, 1997. 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(SINK_H)
- #define SINK_H
-
- #ifdef __cplusplus
-
-
- /*O+O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O
- ObjectClass: COBallSink
-
- Summary: The main Sink COM object class for COBallSink COM objects.
- COM objects of this class offer the IBallSink sink
- interface supporting various ball bounce events. The
- mulitple interfaces on this COM object are constructed via
- the nested interface classes technique.
-
- Interfaces: IUnknown
- Standard interface providing COM object features.
- IBallSink
- Sink interface for Ball events.
-
- 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 COBallSink : public IUnknown
- {
- public:
- // Main Object Constructor & Destructor.
- COBallSink(IUnknown* pUnkOuter, CGuiBall* pGuiBall);
- ~COBallSink(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 CImpIBallSink : public IBallSink
- {
- public:
- // Interface Implementation Constructor & Destructor.
- CImpIBallSink(COBallSink* pBackObj, IUnknown* pUnkOuter);
- ~CImpIBallSink(void);
-
- // IUnknown methods.
- STDMETHODIMP QueryInterface(REFIID, PPVOID);
- STDMETHODIMP_(ULONG) AddRef(void);
- STDMETHODIMP_(ULONG) Release(void);
-
- // IBallSink methods.
- STDMETHODIMP BounceBottom(void);
- STDMETHODIMP BounceLeft(void);
- STDMETHODIMP BounceRight(void);
- STDMETHODIMP BounceTop(void);
-
- private:
- // Data private to this interface implementation of IBallSink.
- COBallSink* m_pBackObj; // Parent Object back pointer.
- IUnknown* m_pUnkOuter; // Outer unknown for Delegation.
- };
-
- // Make the otherwise private and nested IBallSink interface
- // implementation a friend to COM object instantiations of this
- // COBallSink COM object class.
- friend CImpIBallSink;
-
- // Private data of COBallSink COM objects.
-
- // Nested IBallSink implementation instantiation. This IBallSink
- // interface is instantiated inside this COBallSink object as a
- // native interface.
- CImpIBallSink m_ImpIBallSink;
-
- // Main Object reference count.
- ULONG m_cRefs;
-
- // Outer unknown (aggregation delegation). Used when this COM object
- // is being aggregated.
- IUnknown* m_pUnkOuter;
-
- // Pointer to the main object that can service the Sink events.
- CGuiBall* m_pGuiBall;
- };
-
- typedef COBallSink* PCOBallSink;
-
- #endif // __cplusplus
-
-
- #endif // SINK_H
-