core/ASCImageStudio3/ASCGraphics/agg/ASCWrapper/ArrowHead.h

#pragma once
#include "GraphicsPath.h"

namespace Aggplus
{
	class CArrowHead
	{
	private:
		LONG	m_lType;
		CMatrix m_oTransform;

		bool m_bIsMoveTo;
		
		CGraphicsPath m_oPath;
		
	public:
		double m_dX1;
		double m_dY1;
		double m_dX2;
		double m_dY2;

	public:
		CArrowHead()
		{
			m_lType = 0;
			m_bIsMoveTo = false;

			m_dX1 = 0;
			m_dY1 = 0;
			m_dX2 = 1;
			m_dY2 = 1;
		}
		~CArrowHead()
		{
		}

	public:

		inline void SetType(LONG lType)
		{
			m_lType = lType;
			
			switch (m_lType)
			{
			case Aggplus::LineCapSquareAnchor:
			case Aggplus::LineCapRoundAnchor:
			case Aggplus::LineCapDiamondAnchor:
			case Aggplus::LineCapArrowAnchor:
				break;
			default:
				m_lType = 0;
				break;
			}
		}
		inline bool IsNeed()
		{
			return (0 != m_lType);
		}
		
		inline void PathCommandMoveTo(double fX, double fY)
		{
			if (!IsNeed())
				return;

			m_bIsMoveTo = true;

			m_oPath.MoveTo(fX, fY);
			m_oPath.LineTo(fX, fY);
		}
		inline void PathCommandLineTo(double fX, double fY)
		{
			if (!IsNeed())
				return;

			m_oPath.LineTo(fX, fY);
		}
		inline void PathCommandLinesTo(SAFEARRAY* pPoints)
		{
			if (!IsNeed())
				return;
			
			LONG lCount = pPoints->rgsabound[0].cElements;
			double* pData = (double*)pPoints->pvData;

			if (!m_bIsMoveTo && (lCount >= 2))
			{
				PathCommandMoveTo(pData[0], pData[1]);
			}

			m_oPath.AddLines(pData, lCount);
		}

		inline void PathCommandCurveTo(double fX1, double fY1, double fX2, double fY2, double fX3, double fY3)
		{
			if (!IsNeed())
				return;

			m_oPath.CurveTo(fX1, fY1, fX2, fY2, fX3, fY3);
		}
		inline void PathCommandCurvesTo(SAFEARRAY* pPoints)
		{
			if (!IsNeed())
				return;

			LONG lCount = pPoints->rgsabound[0].cElements;
			double* pData = (double*)pPoints->pvData;

			if (!m_bIsMoveTo && (lCount >= 2))
			{
				PathCommandMoveTo(pData[0], pData[1]);
			}

			m_oPath.AddBeziers(pData, lCount);
		}
		inline void PathCommandArcTo(double fX, double fY, double fWidth, double fHeight, double fStartAngle, double fSweepAngle)
		{
			if (!IsNeed())
				return;

			m_oPath.AddArc2(fX, fY, fWidth, fHeight, -fStartAngle, -fSweepAngle);
		}
		inline void PathCommandClose()
		{
			if (!IsNeed())
				return;

			m_oPath.Reset();
		}
		inline void PathCommandEnd()
		{
			if (!IsNeed())
				return;

			m_oPath.Reset();
			m_bIsMoveTo = false;
		}

		inline void PathCommandStart()
		{
			if (!IsNeed())
				return;

			m_oPath.StartFigure();
		}

		inline bool DrawPath(LONG lType)
		{
			if (!IsNeed())
				return false;

			if (lType & 0x01)
			{
				m_oPath.Transform(&m_oTransform);

				LONG lCount		= (LONG)m_oPath.GetPointCount();

				if (2 > lCount)
					return false;

				double* pPoints = new double[2 * lCount];

				m_oPath.GetPathPoints(pPoints, lCount);

				m_dX1 = pPoints[2 * lCount - 4];
				m_dY1 = pPoints[2 * lCount - 3];
				m_dX2 = pPoints[2 * lCount - 2];
				m_dY2 = pPoints[2 * lCount - 1];

				RELEASEARRAYOBJECTS(pPoints);

				return true;
			}

			return false;
		}
	};
}