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/***************************************************************
* Name: CurveShape.h
* Purpose: Defines curve shape class
* Author: Michal Bližňák (michal.bliznak@tiscali.cz)
* Created: 2007-07-22
* Copyright: Michal Bližňák
* License: wxWidgets license (www.wxwidgets.org)
* Notes:
**************************************************************/
#ifndef _WXSFCURVESHAPE_H
#define _WXSFCURVESHAPE_H
#include <wx/wxsf/LineShape.h>
/*!
* \brief Interpolation line shape. The class extends wxSFLineShape class and allows
* user to create curved connection line.
*/
class WXDLLIMPEXP_SF wxSFCurveShape : public wxSFLineShape
{
public:
XS_DECLARE_CLONABLE_CLASS(wxSFCurveShape);
/*! \brief Default constructor. */
wxSFCurveShape();
/*!
* \brief User constructor.
* \param src ID of the source shape
* \param trg ID of the target shape
* \param path Array of line's control points
* \param manager Parent parent diagram manager
*/
wxSFCurveShape(long src, long trg, const wxXS::RealPointList& path, wxSFDiagramManager* manager);
/*!
* \brief Copy constructor.
* \param obj Reference to the source object
*/
wxSFCurveShape(const wxSFCurveShape& obj);
/*! \brief Destructor. */
virtual ~wxSFCurveShape();
// public virtual function
/*!
* \brief Get line's bounding box. The function can be overrided if neccessary.
* \return Bounding rectangle
*/
virtual wxRect GetBoundingBox();
// public functions
/*!
* \brief Get a line point laying on the given line segment and shifted
* from the beggining of the segment by given offset.
* \param segment Zero-based index of the line segment
* \param offset Real value in the range from 0 to 1 which determines
* the linepoint offset inside the line segment
* \return Line point
*/
wxRealPoint GetPoint(size_t segment, double offset);
protected:
// protected virtual functions
/*!
* \brief Internal function used for drawing of completed line shape.
* \param dc Refernce of the device context where the shape will be darwn to
*/
virtual void DrawCompleteLine(wxDC& dc);
private:
// private functions
/*! \brief Auxiliary drawing function. */
void GetSegmentQuaternion(size_t segment, wxRealPoint& A, wxRealPoint& B, wxRealPoint& C, wxRealPoint& D);
/*! \brief Auxiliary drawing function. */
void Catmul_Rom_Kubika(const wxRealPoint& A, const wxRealPoint& B, const wxRealPoint& C, const wxRealPoint& D, wxDC& dc);
/*! \brief Auxiliary drawing function. */
wxRealPoint Coord_Catmul_Rom_Kubika(const wxRealPoint& p1, const wxRealPoint& p2, const wxRealPoint& p3, const wxRealPoint& p4, double t);
};
#endif //_WXSFCURVESHAPE_H
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