UTCRUCAR.H
资源名称:MSDN_VC98.zip [点击查看]
上传用户:bangxh
上传日期:2007-01-31
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文件大小:6k
源码类别:
Windows编程
开发平台:
Visual C++
- /*+==========================================================================
- File: UTCRUCAR.H
- Summary: Include file for the aggregatable COUtilityCruiseCar COM
- object class.
- UTCRUCAR showcases the construction of the COUtilityCruiseCar
- COM object class with the IUnknown, ICar, ICruise, and IUtility
- interfaces. This is done through Aggregation reuse of a
- COCruiseCar COM object (specifically providing its ICar and
- ICruise interface features). COUtilityCruiseCar adds its own
- native implementation of the IUtility interface. The
- aggregated CruiseCar object is implemented and provided in
- an outside COMOBJ.DLL.
- This multiple interface COM Object Class is achieved via
- the technique of nested classes: the implementation of the
- IUtility interface is nested inside of the COUtilityCruiseCar
- COM object class.
- For a comprehensive tutorial code tour of this module's
- contents and offerings see the tutorial COMUSER.HTM
- file. For more specific technical details on the internal
- workings see the comments dispersed throughout the
- module's source code.
- Classes: COUtilityCruiseCar
- Functions: .
- Origin: 8-29-95: atrent - Editor inheritance from CRUCAR.H.
- ----------------------------------------------------------------------------
- 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(UTCRUCAR_H)
- #define UTCRUCAR_H
- #ifdef __cplusplus
- /*O+O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O+++O
- ObjectClass: COUtilityCruiseCar
- Summary: COM Object Class for COUtilityCruiseCar COM Objects.
- COM objects of this class augment COCruiseCar COM objects
- with the IUtility interface features of Offroad and Winch.
- COCruiseCar is reused to offer this COUtilityCruiseCar COM
- Object the ICar interface features of Shift, Clutch, Speed,
- Steer and the ICruise interface features of Engage and
- Adjust. This COUtilityCruiseCar COM object class is
- constructed by aggregation reuse of the COCruiseCar COM
- object class. The mulitple interfaces on this COM object
- class are constructed via the nested class
- interfaces technique.
- Interfaces: IUnknown
- Standard interface providing COM object features.
- ICar
- Basic car features.
- ICruise
- Cruise control system features.
- IUtility
- Sport-utility Car operation features. Implemented in
- this COM object.
- Aggregation: Yes, COUtilityCruiseCar 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 COUtilityCruiseCar : public IUnknown
- {
- public:
- // Main Object Constructor & Destructor.
- COUtilityCruiseCar(IUnknown* pUnkOuter);
- ~COUtilityCruiseCar(void);
- // A general method for initializing a newly created UtilityCruiseCar.
- HRESULT Init(void);
- // IUnknown members. Main object, non-delegating.
- STDMETHODIMP QueryInterface(REFIID, PPVOID);
- STDMETHODIMP_(ULONG) AddRef(void);
- STDMETHODIMP_(ULONG) Release(void);
- private:
- // We declare nested class interface implementations here.
- // We implement the IUtility interface (of course) in this
- // COUtilityCruiseCar COM object class. This is the native interface
- // that we are using as an augmentation to the existing COCruiseCar
- // COM object class.
- class CImpIUtility : public IUtility
- {
- public:
- // Interface Implementation Constructor & Destructor.
- CImpIUtility(COUtilityCruiseCar* pBackObj, IUnknown* pUnkOuter);
- ~CImpIUtility(void);
- // IUnknown members.
- STDMETHODIMP QueryInterface(REFIID, PPVOID);
- STDMETHODIMP_(ULONG) AddRef(void);
- STDMETHODIMP_(ULONG) Release(void);
- // IUtility members.
- STDMETHODIMP Offroad(short nGear);
- STDMETHODIMP Winch(short nRpm);
- private:
- // Data private to this interface implementation of IUtility.
- ULONG m_cRefI; // Interface Ref Count (debugging).
- COUtilityCruiseCar* m_pBackObj; // Parent Object back pointer.
- IUnknown* m_pUnkOuter; // Outer unknown for Delegation.
- };
- // Make the otherwise private and nested IUtility interface
- // implementation a friend to COM object instantiations of this
- // selfsame COUtilityCruiseCar COM object class.
- friend CImpIUtility;
- // Private data of COUtilityCruiseCar COM objects.
- // Nested IUtility implementation instantiation. This IUtility
- // interface is instantiated inside this COUtilityCruiseCar object
- // as a native interface.
- CImpIUtility m_ImpIUtility;
- // Main Object reference count.
- ULONG m_cRefs;
- // Outer unknown (aggregation delegation). Used when this
- // COUtilityCruiseCar object is being aggregated.
- IUnknown* m_pUnkOuter;
- // We need to save the IUnknown interface pointer on the COCruiseCar
- // object that we aggregate. We use this when we need to delegate
- // IUnknown calls to this aggregated inner object.
- IUnknown* m_pUnkCruiseCar;
- };
- typedef COUtilityCruiseCar* PCOUtilityCruiseCar;
- // Here is a prototpye for the UtilityCruiseCar Creation function.
- HRESULT CreateUtilityCruiseCar(
- IUnknown* pUnkOuter,
- REFIID riid,
- PPVOID ppv);
- #endif // __cplusplus
- #endif // UTCRUCAR_H