AOO410/main/drawinglayer/inc/drawinglayer/primitive2d/primitivetools2d.hxx

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#ifndef INCLUDED_DRAWINGLAYER_PRIMITIVE2D_PRIMITIVE2DTOOLS_HXX
#define INCLUDED_DRAWINGLAYER_PRIMITIVE2D_PRIMITIVE2DTOOLS_HXX

#include <drawinglayer/drawinglayerdllapi.h>
#include <drawinglayer/primitive2d/baseprimitive2d.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>

//////////////////////////////////////////////////////////////////////////////

namespace drawinglayer
{
	namespace primitive2d
	{
        /** DiscreteMetricDependentPrimitive2D class
            
            tooling class for BufferedDecompositionPrimitive2D baseed classes which are view-dependent
            regarding the size of a discrete unit. The implementation of get2DDecomposition
            guards the buffered local decomposition and ensures that a create2DDecomposition
            implementation may use an up-to-date DiscreteUnit accessible using getDiscreteUnit()
         */
		class DRAWINGLAYER_DLLPUBLIC DiscreteMetricDependentPrimitive2D : public BufferedDecompositionPrimitive2D
		{
		private:
			/** the last used fDiscreteUnit definitions for decomposition. Since this
			    is checked and updated from get2DDecomposition() it will be current and
			    usable in create2DDecomposition()
             */
			double									mfDiscreteUnit;

        protected:
            /// helper to update discrete unit
            void updateDiscreteUnit(double fNew)
            {
                mfDiscreteUnit = fNew;
            }

		public:
            /// constructor
			DiscreteMetricDependentPrimitive2D()
			:	BufferedDecompositionPrimitive2D(),
				mfDiscreteUnit(0.0)
			{
			}

			/// data read access
			double getDiscreteUnit() const { return mfDiscreteUnit; }

			/// get local decomposition. Overloaded since this decomposition is view-dependent
			virtual Primitive2DSequence get2DDecomposition(const geometry::ViewInformation2D& rViewInformation) const;
		};
	} // end of namespace primitive2d
} // end of namespace drawinglayer

//////////////////////////////////////////////////////////////////////////////

namespace drawinglayer
{
	namespace primitive2d
	{
        /** ViewportDependentPrimitive2D class
            
            tooling class for BufferedDecompositionPrimitive2D baseed classes which are view-dependent
            regarding the viewport. The implementation of get2DDecomposition
            guards the buffered local decomposition and ensures that a create2DDecomposition
            implementation may use an up-to-date Viewport accessible using getViewport()
         */
		class DRAWINGLAYER_DLLPUBLIC ViewportDependentPrimitive2D : public BufferedDecompositionPrimitive2D
		{
		private:
			/** the last used Viewport definition for decomposition. Since this
			    is checked and updated from get2DDecomposition() it will be current and
			    usable in create2DDecomposition()
             */
            basegfx::B2DRange                       maViewport;

		public:
            /// constructor
			ViewportDependentPrimitive2D()
			:	BufferedDecompositionPrimitive2D(),
				maViewport()
			{
			}

			/// data read access
			const basegfx::B2DRange& getViewport() const { return maViewport; }

			/// get local decomposition. Overloaded since this decomposition is view-dependent
			virtual Primitive2DSequence get2DDecomposition(const geometry::ViewInformation2D& rViewInformation) const;
		};
	} // end of namespace primitive2d
} // end of namespace drawinglayer

//////////////////////////////////////////////////////////////////////////////

namespace drawinglayer
{
	namespace primitive2d
	{
        /** ViewTransformationDependentPrimitive2D class
            
            tooling class for BufferedDecompositionPrimitive2D based classes which are view-dependent
            regarding the complete Viewtransformation. The implementation of get2DDecomposition
            guards the buffered local decomposition and ensures that a create2DDecomposition
            implementation may use an up-to-date ViewTransformation accessible using getViewTransformation()
         */
		class DRAWINGLAYER_DLLPUBLIC ViewTransformationDependentPrimitive2D : public BufferedDecompositionPrimitive2D
		{
		private:
			/** the last used ViewTransformation definition for decomposition. Since this
			    is checked and updated from get2DDecomposition() it will be current and
			    usable in create2DDecomposition()
             */
            basegfx::B2DHomMatrix					maViewTransformation;

		public:
            /// constructor
			ViewTransformationDependentPrimitive2D()
			:	BufferedDecompositionPrimitive2D(),
				maViewTransformation()
			{
			}

			/// data read access
			const basegfx::B2DHomMatrix& getViewTransformation() const { return maViewTransformation; }

			/// get local decomposition. Overloaded since this decomposition is view-dependent
			virtual Primitive2DSequence get2DDecomposition(const geometry::ViewInformation2D& rViewInformation) const;
		};
	} // end of namespace primitive2d
} // end of namespace drawinglayer

//////////////////////////////////////////////////////////////////////////////

namespace drawinglayer
{
	namespace primitive2d
	{
        /** ObjectAndViewTransformationDependentPrimitive2D class
            
            tooling class for BufferedDecompositionPrimitive2D based classes which are view-dependent
            and Object-Transform dependent. The implementation of get2DDecomposition
            guards the buffered local decomposition and ensures that a create2DDecomposition
            implementation may use an up-to-date ViewTransformation accessible using getViewTransformation()
			and an object transformation via getObjectTransformation()
         */
		class DRAWINGLAYER_DLLPUBLIC ObjectAndViewTransformationDependentPrimitive2D : public BufferedDecompositionPrimitive2D
		{
		private:
			/** the last used ViewTransformation and the last ObjectTransformation 
				definition for decomposition. Since this is checked and updated from 
				get2DDecomposition() it will be current and usable in create2DDecomposition()
             */
            basegfx::B2DHomMatrix					maViewTransformation;
            basegfx::B2DHomMatrix					maObjectTransformation;

		public:
            /// constructor
			ObjectAndViewTransformationDependentPrimitive2D()
			:	BufferedDecompositionPrimitive2D(),
				maViewTransformation(),
				maObjectTransformation()
			{
			}

			/// data read access
			const basegfx::B2DHomMatrix& getViewTransformation() const { return maViewTransformation; }
			const basegfx::B2DHomMatrix& getObjectTransformation() const { return maObjectTransformation; }

			/// get local decomposition. Overloaded since this decomposition is view-dependent
			virtual Primitive2DSequence get2DDecomposition(const geometry::ViewInformation2D& rViewInformation) const;
		};
	} // end of namespace primitive2d
} // end of namespace drawinglayer

//////////////////////////////////////////////////////////////////////////////

#endif //INCLUDED_DRAWINGLAYER_PRIMITIVE2D_PRIMITIVE2DTOOLS_HXX

//////////////////////////////////////////////////////////////////////////////
// eof