fpicker/source/win32/filepicker/dibpreview.hxx

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  30
  31 #ifndef _DIBPREVIEW_HXX_
  32 #define _DIBPREVIEW_HXX_
  33
  34 //------------------------------------------------------------------------
  35 // includes
  36 //------------------------------------------------------------------------
  37
  38 #include "previewbase.hxx"
  39 #include <osl/mutex.hxx>
  40
  41 #if defined _MSC_VER
  42 #pragma warning(push, 1)
  43 #endif
  44 #include <windows.h>
  45 #if defined _MSC_VER
  46 #pragma warning(pop)
  47 #endif
  48
  49 //---------------------------------------------
  50 // A very simple wrapper for a window that does
  51 // display DIBs.
  52 // Maybe it would be better and more extensible
  53 // to create another class that is responsible
  54 // for rendering a specific image format into
  55 // the area of the window, but for our purpose
  56 // it's enough to go the simple way - KISS.
  57 //---------------------------------------------
  58
  59 class CDIBPreview : public PreviewBase
  60 {
  61 public:
  62
  63     // ctor
  64     CDIBPreview(HINSTANCE instance,HWND parent,sal_Bool bShowWindow = sal_False);
  65
  66     // dtor
  67     virtual ~CDIBPreview( );
  68
  69     // preview interface implementation
  70
  71     virtual sal_Int32 SAL_CALL getTargetColorDepth()
  72         throw (::com::sun::star::uno::RuntimeException);
  73
  74     virtual sal_Int32 SAL_CALL getAvailableWidth()
  75         throw (::com::sun::star::uno::RuntimeException);
  76
  77     virtual sal_Int32 SAL_CALL getAvailableHeight()
  78         throw (::com::sun::star::uno::RuntimeException);
  79
  80     virtual void SAL_CALL setImage(sal_Int16 aImageFormat, const ::com::sun::star::uno::Any& aImage)
  81         throw (::com::sun::star::lang::IllegalArgumentException, ::com::sun::star::uno::RuntimeException);
  82
  83     virtual sal_Bool SAL_CALL setShowState(sal_Bool bShowState)
  84         throw (::com::sun::star::uno::RuntimeException);
  85
  86     virtual sal_Bool SAL_CALL getShowState()
  87         throw (::com::sun::star::uno::RuntimeException);
  88
  89     virtual HWND SAL_CALL getWindowHandle() const;
  90
  91 private:
  92     virtual void SAL_CALL onPaint( HWND hWnd, HDC hDC );
  93
  94     ATOM SAL_CALL RegisterDibPreviewWindowClass( );
  95     void SAL_CALL UnregisterDibPreviewWindowClass( );
  96
  97     static LRESULT CALLBACK WndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
  98
  99 private:
 100     HINSTANCE  m_Instance;
 101     HWND           m_Hwnd;
 102     com::sun::star::uno::Sequence<sal_Int8> m_Image;
 103     osl::Mutex  m_PaintLock;
 104
 105     // the preview window class has to be registered only
 106     // once per process, so multiple instance of this class
 107     // share the registered window class
 108     static ATOM       s_ClassAtom;
 109     static osl::Mutex s_Mutex;
 110     static sal_Int32  s_RegisterDibPreviewWndCount;
 111
 112 // prevent copy and assignment
 113 private:
 114     CDIBPreview(const CDIBPreview&);
 115     CDIBPreview& operator=(const CDIBPreview&);
 116 };
 117
 118
 119 #endif