fpicker/source/win32/filepicker/dibpreview.hxx

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  27
  28 #ifndef _DIBPREVIEW_HXX_
  29 #define _DIBPREVIEW_HXX_
  30
  31 //------------------------------------------------------------------------
  32 // includes
  33 //------------------------------------------------------------------------
  34
  35 #include "previewbase.hxx"
  36 #include <osl/mutex.hxx>
  37
  38 #if defined _MSC_VER
  39 #pragma warning(push, 1)
  40 #endif
  41 #include <windows.h>
  42 #if defined _MSC_VER
  43 #pragma warning(pop)
  44 #endif
  45
  46 //---------------------------------------------
  47 // A very simple wrapper for a window that does
  48 // display DIBs.
  49 // Maybe it would be better and more extensible
  50 // to create another class that is responsible
  51 // for rendering a specific image format into
  52 // the area of the window, but for our purpose
  53 // it's enough to go the simple way - KISS.
  54 //---------------------------------------------
  55
  56 class CDIBPreview : public PreviewBase
  57 {
  58 public:
  59
  60     // ctor
  61     CDIBPreview(HINSTANCE instance,HWND parent,sal_Bool bShowWindow = sal_False);
  62
  63     // dtor
  64     virtual ~CDIBPreview( );
  65
  66     // preview interface implementation
  67
  68     virtual sal_Int32 SAL_CALL getTargetColorDepth()
  69         throw (::com::sun::star::uno::RuntimeException);
  70
  71     virtual sal_Int32 SAL_CALL getAvailableWidth()
  72         throw (::com::sun::star::uno::RuntimeException);
  73
  74     virtual sal_Int32 SAL_CALL getAvailableHeight()
  75         throw (::com::sun::star::uno::RuntimeException);
  76
  77     virtual void SAL_CALL setImage(sal_Int16 aImageFormat, const ::com::sun::star::uno::Any& aImage)
  78         throw (::com::sun::star::lang::IllegalArgumentException, ::com::sun::star::uno::RuntimeException);
  79
  80     virtual sal_Bool SAL_CALL setShowState(sal_Bool bShowState)
  81         throw (::com::sun::star::uno::RuntimeException);
  82
  83     virtual sal_Bool SAL_CALL getShowState()
  84         throw (::com::sun::star::uno::RuntimeException);
  85
  86     virtual HWND SAL_CALL getWindowHandle() const;
  87
  88 private:
  89     virtual void SAL_CALL onPaint( HWND hWnd, HDC hDC );
  90
  91     ATOM SAL_CALL RegisterDibPreviewWindowClass( );
  92     void SAL_CALL UnregisterDibPreviewWindowClass( );
  93
  94     static LRESULT CALLBACK WndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
  95
  96 private:
  97     HINSTANCE  m_Instance;
  98     HWND       m_Hwnd;
  99     com::sun::star::uno::Sequence<sal_Int8> m_Image;
 100     osl::Mutex  m_PaintLock;
 101
 102     // the preview window class has to be registered only
 103     // once per process, so multiple instance of this class
 104     // share the registered window class
 105     static ATOM       s_ClassAtom;
 106     static osl::Mutex s_Mutex;
 107     static sal_Int32  s_RegisterDibPreviewWndCount;
 108
 109 // prevent copy and assignment
 110 private:
 111     CDIBPreview(const CDIBPreview&);
 112     CDIBPreview& operator=(const CDIBPreview&);
 113 };
 114
 115
 116 #endif