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      28                 :            : 
      29                 :            : #ifndef _CPPCANVAS_CACHEDPRIMITIVEBASE_HXX
      30                 :            : #define _CPPCANVAS_CACHEDPRIMITIVEBASE_HXX
      31                 :            : 
      32                 :            : #include <com/sun/star/uno/Reference.hxx>
      33                 :            : #include <com/sun/star/rendering/XCanvas.hpp>
      34                 :            : 
      35                 :            : #include <cppcanvas/canvas.hxx>
      36                 :            : #include <boost/utility.hpp>
      37                 :            : 
      38                 :            : #include "action.hxx"
      39                 :            : 
      40                 :            : namespace basegfx { class B2DHomMatrix; }
      41                 :            : 
      42                 :            : 
      43                 :            : /* Definition of internal::CachedPrimitiveBase class */
      44                 :            : 
      45                 :            : namespace cppcanvas
      46                 :            : {
      47                 :            :     namespace internal
      48                 :            :     {
      49                 :            :         /** Base class providing cached re-rendering, if XCanvas
      50                 :            :             returns XCachedPrimitive
      51                 :            : 
      52                 :            :             Derive from this class and implement private render()
      53                 :            :             method to perform the actual primitive rendering. Return
      54                 :            :             cached primitive into given reference. Next time this
      55                 :            :             class' public render() method gets called, the cached
      56                 :            :             representation is taken.
      57                 :            :          */
      58                 :            :         class CachedPrimitiveBase : public Action,
      59                 :            :                                     private ::boost::noncopyable
      60                 :            :         {
      61                 :            :         public:
      62                 :            :             /** Constructor
      63                 :            : 
      64                 :            :                 @param rCanvas
      65                 :            :                 Canvas on which this primitive is to appear
      66                 :            : 
      67                 :            :                 @param bOnlyRedrawWithSameTransform
      68                 :            :                 When true, this class only reuses the cached
      69                 :            :                 primitive, if the overall transformation stays the
      70                 :            :                 same. Otherwise, repaints are always performed via the
      71                 :            :                 cached primitive.
      72                 :            :              */
      73                 :            :             CachedPrimitiveBase( const CanvasSharedPtr& rCanvas,
      74                 :            :                                  bool                   bOnlyRedrawWithSameTransform );
      75 [ #  # ][ #  # ]:          0 :             virtual ~CachedPrimitiveBase() {}
                 [ #  # ]
      76                 :            : 
      77                 :            :             virtual bool render( const ::basegfx::B2DHomMatrix& rTransformation ) const;
      78                 :            : 
      79                 :            :         protected:
      80                 :            :             using Action::render;
      81                 :            : 
      82                 :            :         private:
      83                 :            :             virtual bool renderPrimitive( ::com::sun::star::uno::Reference<
      84                 :            :                                      ::com::sun::star::rendering::XCachedPrimitive >& rCachedPrimitive,
      85                 :            :                                  const ::basegfx::B2DHomMatrix&                       rTransformation ) const = 0;
      86                 :            : 
      87                 :            :             CanvasSharedPtr                                             mpCanvas;
      88                 :            :             mutable ::com::sun::star::uno::Reference<
      89                 :            :                     ::com::sun::star::rendering::XCachedPrimitive >     mxCachedPrimitive;
      90                 :            :             mutable ::basegfx::B2DHomMatrix                             maLastTransformation;
      91                 :            :             const bool                                                  mbOnlyRedrawWithSameTransform;
      92                 :            :         };
      93                 :            :     }
      94                 :            : }
      95                 :            : 
      96                 :            : #endif /*_CPPCANVAS_CACHEDPRIMITIVEBASE_HXX */
      97                 :            : 
      98                 :            : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */