shell/inc/internal/thumbviewer.hxx

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  30
  31 #ifndef THUMBVIEWER_HXX_INCLUDED
  32 #define THUMBVIEWER_HXX_INCLUDED
  33
  34 #if defined _MSC_VER
  35 #pragma warning(push, 1)
  36 #pragma warning(disable:4917)
  37 #endif
  38 #include <objidl.h>
  39 #include <shlobj.h>
  40 #ifdef __MINGW32__
  41 #include <algorithm>
  42 using std::min;
  43 using std::max;
  44 #endif
  45 #include <gdiplus.h>
  46 #if defined _MSC_VER
  47 #pragma warning(pop)
  48 #endif
  49 #include <string>
  50
  51 class CThumbviewer : public IPersistFile, public IExtractImage
  52 {
  53 public:
  54     CThumbviewer(long RefCnt = 1);
  55     virtual ~CThumbviewer();
  56
  57     //-----------------------------
  58     // IUnknown methods
  59     //-----------------------------
  60
  61     virtual HRESULT STDMETHODCALLTYPE QueryInterface(
  62             REFIID riid,
  63             void __RPC_FAR *__RPC_FAR *ppvObject);
  64
  65     virtual ULONG STDMETHODCALLTYPE AddRef( void);
  66
  67     virtual ULONG STDMETHODCALLTYPE Release( void);
  68
  69     //----------------------------
  70     // IExtractImage methods
  71     //----------------------------
  72
  73     virtual HRESULT STDMETHODCALLTYPE Extract(HBITMAP *phBmpImage);
  74
  75     virtual HRESULT STDMETHODCALLTYPE GetLocation(
  76         LPWSTR pszPathBuffer,
  77         DWORD cchMax,
  78         DWORD *pdwPriority,
  79         const SIZE *prgSize,
  80         DWORD dwRecClrDepth,
  81         DWORD *pdwFlags);
  82
  83     //----------------------------
  84     // IPersist methods
  85     //----------------------------
  86
  87     virtual HRESULT STDMETHODCALLTYPE GetClassID(CLSID* pClassID);
  88
  89     //----------------------------
  90     // IPersistFile methods
  91     //----------------------------
  92
  93     virtual HRESULT STDMETHODCALLTYPE IsDirty();
  94
  95     virtual HRESULT STDMETHODCALLTYPE Load(
  96             /* [in] */ LPCOLESTR pszFileName,
  97             /* [in] */ DWORD dwMode);
  98
  99     virtual HRESULT STDMETHODCALLTYPE Save(
 100             /* [unique][in] */ LPCOLESTR pszFileName,
 101             /* [in] */ BOOL fRemember);
 102
 103     virtual HRESULT STDMETHODCALLTYPE SaveCompleted(
 104             /* [unique][in] */ LPCOLESTR pszFileName);
 105
 106     virtual HRESULT STDMETHODCALLTYPE GetCurFile(
 107             /* [out] */ LPOLESTR __RPC_FAR *ppszFileName);
 108
 109 private:
 110     Gdiplus::Rect CalcScaledAspectRatio(Gdiplus::Rect src, Gdiplus::Rect dest);
 111
 112 private:
 113     long                 ref_count_;
 114     std::wstring filename_;
 115     SIZE         thumbnail_size_;
 116     DWORD        color_depth_;
 117     ULONG_PTR    gdiplus_token_;
 118     Gdiplus::Bitmap* signet_;
 119 };
 120
 121 #endif