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21 
22 
23 
24 #ifndef _DIBPREVIEW_HXX_
25 #define _DIBPREVIEW_HXX_
26 
27 //------------------------------------------------------------------------
28 // includes
29 //------------------------------------------------------------------------
30 
31 #include "previewbase.hxx"
32 #include <osl/mutex.hxx>
33 
34 #if defined _MSC_VER
35 #pragma warning(push, 1)
36 #endif
37 #include <windows.h>
38 #if defined _MSC_VER
39 #pragma warning(pop)
40 #endif
41 
42 //---------------------------------------------
43 // A very simple wrapper for a window that does
44 // display DIBs.
45 // Maybe it would be better and more extensible
46 // to create another class that is responsible
47 // for rendering a specific image format into
48 // the area of the window, but for our purpose
49 // it's enough to go the simple way - KISS.
50 //---------------------------------------------
51 
52 class CDIBPreview : public PreviewBase
53 {
54 public:
55 
56 	// ctor
57 	CDIBPreview(HINSTANCE instance,HWND parent,sal_Bool bShowWindow = sal_False);
58 
59     // dtor
60 	virtual ~CDIBPreview( );
61 
62 	// preview interface implementation
63 
64     virtual sal_Int32 SAL_CALL getTargetColorDepth()
65 		throw (::com::sun::star::uno::RuntimeException);
66 
67     virtual sal_Int32 SAL_CALL getAvailableWidth()
68 		throw (::com::sun::star::uno::RuntimeException);
69 
70     virtual sal_Int32 SAL_CALL getAvailableHeight()
71 		throw (::com::sun::star::uno::RuntimeException);
72 
73     virtual void SAL_CALL setImage(sal_Int16 aImageFormat, const ::com::sun::star::uno::Any& aImage)
74 		throw (::com::sun::star::lang::IllegalArgumentException, ::com::sun::star::uno::RuntimeException);
75 
76     virtual sal_Bool SAL_CALL setShowState(sal_Bool bShowState)
77 		throw (::com::sun::star::uno::RuntimeException);
78 
79     virtual sal_Bool SAL_CALL getShowState()
80 		throw (::com::sun::star::uno::RuntimeException);
81 
82 	virtual HWND SAL_CALL getWindowHandle() const;
83 
84 private:
85 	virtual void SAL_CALL onPaint( HWND hWnd, HDC hDC );
86 
87     ATOM SAL_CALL RegisterDibPreviewWindowClass( );
88     void SAL_CALL UnregisterDibPreviewWindowClass( );
89 
90     static LRESULT CALLBACK WndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
91 
92 private:
93 	HINSTANCE  m_Instance;
94 	HWND	   m_Hwnd;
95 	com::sun::star::uno::Sequence<sal_Int8> m_Image;
96 	osl::Mutex	m_PaintLock;
97 
98     // the preview window class has to be registered only
99     // once per process, so multiple instance of this class
100     // share the registered window class
101     static ATOM       s_ClassAtom;
102     static osl::Mutex s_Mutex;
103     static sal_Int32  s_RegisterDibPreviewWndCount;
104 
105 // prevent copy and assignment
106 private:
107     CDIBPreview(const CDIBPreview&);
108     CDIBPreview& operator=(const CDIBPreview&);
109 };
110 
111 
112 #endif
113