AOO410/main/drawinglayer/inc/drawinglayer/primitive2d/hiddengeometryprimitive2d.hxx

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#ifndef INCLUDED_DRAWINGLAYER_PRIMITIVE2D_HIDDENGEOMETRYPRIMITIVE2D_HXX
#define INCLUDED_DRAWINGLAYER_PRIMITIVE2D_HIDDENGEOMETRYPRIMITIVE2D_HXX

#include <drawinglayer/drawinglayerdllapi.h>
#include <drawinglayer/primitive2d/groupprimitive2d.hxx>

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

namespace drawinglayer
{
	namespace primitive2d
	{
		// This primitive is used to represent geometry for non-visible objects,
		// e.g. a PresObj's outline. To still be able to use primitives for HitTest 
        // functionality, the 2d decompositions will produce an as much as possible 
        // simplified line geometry encapsulated in this primtive when there is no 
        // line geometry. In a further enchanced version this may change to 'if neither 
        // filled nor lines' creation criteria. The whole primitive decomposes to nothing, 
        // so no one not knowing it will be influenced. Only helper processors for hit test 
        // (and maybe BoundRect extractors) will use it and it's children subcontent.
		class DRAWINGLAYER_DLLPUBLIC HiddenGeometryPrimitive2D : public GroupPrimitive2D
		{
		public:
			HiddenGeometryPrimitive2D(const Primitive2DSequence& rChildren);

			// despite returning an empty decomposition since it's no visualisation data, 
			// range calculation is intended to use hidden geometry, so
			// the local implementation will return the children's range
			virtual basegfx::B2DRange getB2DRange(const geometry::ViewInformation2D& rViewInformation) const;

			/// local decomposition. Implementation will return empty Primitive2DSequence
			virtual Primitive2DSequence get2DDecomposition(const geometry::ViewInformation2D& rViewInformation) const;

			// provide unique ID
			DeclPrimitrive2DIDBlock()
		};
	} // end of namespace primitive2d
} // end of namespace drawinglayer

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

#endif //INCLUDED_DRAWINGLAYER_PRIMITIVE2D_HIDDENGEOMETRYPRIMITIVE2D_HXX

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