120 lines
3 KiB
C
120 lines
3 KiB
C
|
/*===================================================================
|
||
|
|
Microsoft Denali
|
||
|
|
|
||
|
|
Microsoft Confidential.
|
||
|
|
Copyright 1997 Microsoft Corporation. All Rights Reserved.
|
||
|
|
|
||
|
|
Component: IConnectionPoint implementation
|
||
|
|
|
||
|
|
File: ConnPt.h
|
||
|
|
|
||
|
|
Owner: DGottner
|
||
|
|
|
||
|
|
Implementation of IConnectionPoint
|
||
|
|
===================================================================*/
|
||
|
|
|
||
|
|
#ifndef _ConnPt_H
|
||
|
|
#define _ConnPt_H
|
||
|
|
|
||
|
|
/*
|
||
|
|
* C C o n n e c t i o n P o i n t
|
||
|
|
*
|
||
|
|
* IConnectionPoint interface implementation for OLE objects
|
||
|
|
*
|
||
|
|
* This class contains the basic five IConnectionPoint members. The Big Three
|
||
|
|
* (QueryInterface, AddRef, Release) are left as pure virtual, as this
|
||
|
|
* class is designed as an intermediate class for further derivation.
|
||
|
|
*
|
||
|
|
* This also means that we no longer need a pointer to the controlling unknown.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "DblLink.h"
|
||
|
|
|
||
|
|
|
||
|
|
/* ****************************************************************************
|
||
|
|
Class: CConnectionPoint
|
||
|
|
Synopsis: Provide a reusable implementation of IConnectionPoint
|
||
|
|
|
||
|
|
NOTE: Linked list of sinks is used because we are expecting very
|
||
|
|
few connections. (in fact only one (Caesars))
|
||
|
|
*/
|
||
|
|
|
||
|
|
class CConnectionPoint : public IConnectionPoint
|
||
|
|
{
|
||
|
|
friend class CEnumConnections;
|
||
|
|
|
||
|
|
private:
|
||
|
|
struct CSinkElem : CDblLink
|
||
|
|
{
|
||
|
|
DWORD m_dwCookie; // cookie that we assigned the connection
|
||
|
|
IUnknown * m_pUnkObj; // event sink
|
||
|
|
|
||
|
|
CSinkElem(DWORD dwCookie, IUnknown *pUnkObj)
|
||
|
|
{
|
||
|
|
m_dwCookie = dwCookie;
|
||
|
|
if ((m_pUnkObj = pUnkObj) != NULL) m_pUnkObj->AddRef();
|
||
|
|
}
|
||
|
|
|
||
|
|
~CSinkElem()
|
||
|
|
{
|
||
|
|
if (m_pUnkObj) m_pUnkObj->Release();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
CDblLink m_listSinks; // list of event sinks
|
||
|
|
DWORD m_dwCookieNext; // Next cookie
|
||
|
|
|
||
|
|
protected:
|
||
|
|
IUnknown * m_pUnkContainer; // pointer to parent container
|
||
|
|
GUID m_uidEvent; // connection point interface
|
||
|
|
|
||
|
|
public:
|
||
|
|
CConnectionPoint(IUnknown *, const GUID &);
|
||
|
|
~CConnectionPoint();
|
||
|
|
|
||
|
|
// IConnectionPoint members
|
||
|
|
STDMETHODIMP GetConnectionInterface(GUID *);
|
||
|
|
STDMETHODIMP GetConnectionPointContainer(IConnectionPointContainer **);
|
||
|
|
STDMETHODIMP Advise(IUnknown *, DWORD *);
|
||
|
|
STDMETHODIMP Unadvise(DWORD);
|
||
|
|
STDMETHODIMP EnumConnections(IEnumConnections **);
|
||
|
|
|
||
|
|
inline BOOL FIsEmpty() // quick way to check if list is empty w/o allocating enumerator
|
||
|
|
{
|
||
|
|
return m_listSinks.FIsEmpty();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/* ****************************************************************************
|
||
|
|
Class: CEnumConnections
|
||
|
|
Synopsis: Provide the enumerator for CConnectionPoint
|
||
|
|
*/
|
||
|
|
|
||
|
|
class CEnumConnections : public IEnumConnections
|
||
|
|
{
|
||
|
|
private:
|
||
|
|
ULONG m_cRefs; // Reference count
|
||
|
|
CDblLink * m_pElemCurr; // Current element
|
||
|
|
CConnectionPoint * m_pCP; // pointer to iteratee
|
||
|
|
|
||
|
|
public:
|
||
|
|
CEnumConnections(CConnectionPoint *pCP);
|
||
|
|
~CEnumConnections(void);
|
||
|
|
|
||
|
|
// The Big Three
|
||
|
|
|
||
|
|
STDMETHODIMP QueryInterface(REFIID, LPVOID *);
|
||
|
|
STDMETHODIMP_(ULONG) AddRef(void);
|
||
|
|
STDMETHODIMP_(ULONG) Release(void);
|
||
|
|
|
||
|
|
// IEnumConnections members
|
||
|
|
|
||
|
|
STDMETHODIMP Next(ULONG, CONNECTDATA *, ULONG *);
|
||
|
|
STDMETHODIMP Skip(ULONG);
|
||
|
|
STDMETHODIMP Reset(void);
|
||
|
|
STDMETHODIMP Clone(IEnumConnections **);
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif _ConnPt_H_
|