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58 lines
1.7 KiB
58 lines
1.7 KiB
// DataCallback.h: interface for the CDataCallback class.
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//
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//////////////////////////////////////////////////////////////////////
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#ifndef _INC_DATACALLBACK
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#define _INC_DATACALLBACK
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#include "resource.h"
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#include "cwia.h"
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#include "Mainfrm.h"
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#define WM_STATUS WM_USER+5
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// IWiaDataCallback
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class CWiaDataCallback : public IWiaDataCallback
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{
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private:
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ULONG m_cRef; // Object reference count.
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PBYTE m_pBuffer; // complete data buffer
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LONG m_MemBlockSize;
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LONG m_BytesTransfered;
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GUID m_cFormat;
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CMainFrame* m_pMainFrm;
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HWND m_hPreviewWnd;
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long m_lPageCount;
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public:
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CWiaDataCallback();
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~CWiaDataCallback();
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// IUnknown members that delegate to m_pUnkRef.
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HRESULT _stdcall QueryInterface(const IID&,void**);
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ULONG _stdcall AddRef();
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ULONG _stdcall Release();
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HRESULT _stdcall Initialize(HWND hPreviewWnd = NULL);
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HRESULT _stdcall BandedDataCallback(
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LONG lMessage,
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LONG lStatus,
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LONG lPercentComplete,
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LONG lOffset,
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LONG lLength,
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LONG lReserved,
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LONG lResLength,
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BYTE* pbBuffer);
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//
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// helpers
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//
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BYTE* _stdcall GetDataPtr();
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private:
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void PaintPreviewWindow(long lOffset);
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void ScaleBitmapToDC(HDC hDC, HDC hDCM, LPRECT lpDCRect, LPRECT lpDIBRect);
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void ScreenRectToClientRect(HWND hWnd,LPRECT pRect);
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};
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#endif
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