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137 lines
3.9 KiB
137 lines
3.9 KiB
/*******************************************************************************
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*
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* (C) COPYRIGHT MICROSOFT CORPORATION, 1998
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*
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* TITLE: GWIAEVNT.H
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*
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* VERSION: 1.0
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*
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* AUTHOR: ShaunIv
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*
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* DATE: 12/29/1999
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*
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* DESCRIPTION: Generic reusable WIA event handler that posts the specified
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* message to the specified window.
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*
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* The message will be sent with the following arguments:
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*
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*
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* WPARAM = NULL
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* LPARAM = CGenericWiaEventHandler::CEventMessage *pEventMessage
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*
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* pEventMessage MUST be freed in the message handler using delete
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*
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* pEventMessage is allocated using an overloaded new operator, to ensure that
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* the same allocator and de-allocator are used.
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*
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*******************************************************************************/
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#ifndef __GWIAEVNT_H_INCLUDED
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#define __GWIAEVNT_H_INCLUDED
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#include <windows.h>
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#include "wia.h"
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#include "simstr.h"
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#include "wiadebug.h"
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#include "modlock.h"
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//
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// If the callee doesn't return this value, we delete the message data ourselves.
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//
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#define HANDLED_EVENT_MESSAGE 1002
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class CGenericWiaEventHandler : public IWiaEventCallback
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{
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public:
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class CEventMessage
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{
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private:
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GUID m_guidEventId;
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CSimpleStringWide m_wstrEventDescription;
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CSimpleStringWide m_wstrDeviceId;
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CSimpleStringWide m_wstrDeviceDescription;
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DWORD m_dwDeviceType;
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CSimpleStringWide m_wstrFullItemName;
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private:
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// No implementation
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CEventMessage(void);
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CEventMessage( const CEventMessage & );
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CEventMessage &operator=( const CEventMessage & );
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public:
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CEventMessage( const GUID &guidEventId, LPCWSTR pwszEventDescription, LPCWSTR pwszDeviceId, LPCWSTR pwszDeviceDescription, DWORD dwDeviceType, LPCWSTR pwszFullItemName )
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: m_guidEventId(guidEventId),
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m_wstrEventDescription(pwszEventDescription),
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m_wstrDeviceId(pwszDeviceId),
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m_wstrDeviceDescription(pwszDeviceDescription),
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m_dwDeviceType(dwDeviceType),
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m_wstrFullItemName(pwszFullItemName)
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{
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}
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GUID EventId(void) const
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{
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return m_guidEventId;
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}
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CSimpleStringWide EventDescription(void) const
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{
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return m_wstrEventDescription;
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}
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CSimpleStringWide DeviceId(void) const
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{
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return m_wstrDeviceId;
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}
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CSimpleStringWide DeviceDescription(void) const
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{
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return m_wstrDeviceDescription;
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}
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DWORD DeviceType(void) const
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{
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return m_dwDeviceType;
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}
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CSimpleStringWide FullItemName(void) const
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{
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return m_wstrFullItemName;
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}
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void *operator new( size_t nSize )
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{
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if (nSize)
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{
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return reinterpret_cast<void*>(LocalAlloc(LPTR,nSize));
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}
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return NULL;
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}
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void operator delete( void *pVoid )
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{
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if (pVoid)
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{
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LocalFree( pVoid );
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}
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}
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};
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private:
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HWND m_hWnd;
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UINT m_nWiaEventMessage;
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LONG m_cRef;
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public:
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CGenericWiaEventHandler(void);
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~CGenericWiaEventHandler(void) {}
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STDMETHODIMP Initialize( HWND hWnd, UINT nWiaEventMessage );
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// IUnknown
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STDMETHODIMP QueryInterface( REFIID riid, LPVOID *ppvObject );
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STDMETHODIMP_(ULONG) AddRef(void);
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STDMETHODIMP_(ULONG) Release(void);
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//IWiaEventCallback
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STDMETHODIMP ImageEventCallback( const GUID *pEventGUID, BSTR bstrEventDescription, BSTR bstrDeviceID, BSTR bstrDeviceDescription, DWORD dwDeviceType, BSTR bstrFullItemName, ULONG *pulEventType, ULONG ulReserved );
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public:
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static HRESULT RegisterForWiaEvent( LPCWSTR pwszDeviceId, const GUID &guidEvent, IUnknown **ppUnknown, HWND hWnd, UINT nMsg );
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};
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#endif //__GWIAEVNT_H_INCLUDED
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