#pragma once
#include "circleobj.h"

class CArcObj :
	public CCircleObj
{
	protected:
	DECLARE_SERIAL(CArcObj);
    CArcObj(void);

public:
	//以下是構造函數
	CArcObj(const CRect& position);
	virtual ~CArcObj(void);
	
//下面是實現函數
	virtual void Draw(CVisDrawView* pView, CDC* pDC);
	virtual void Serialize(CArchive& ar);

	//手柄操作函數
	virtual int GetHandleCount();
	virtual CPoint GetHandle(CVisDrawView* pView, int nHandle);

    virtual void MoveHandleTo(int nHandle, CPoint point, CVisDrawView* pView);

//以下是操作函數

	//屬性
	double CalcArcAngle(CVisDrawView* pView, CPoint arcpoint);
	void CalculateArcParameterbytp(CVisDrawView* pView, CPoint startpoint,CPoint middlepoint,CPoint endpoint);
	
	void SetStartAngle(double radium){m_StartAngle = radium;}
	void SetEndAngle(double radium){m_EndAngle = radium;}
	double GetStartAngle(){return m_StartAngle;}
	double GetEndAngle(){return m_EndAngle;}

	//計算矩形圖元的邊界矩形
	virtual CRect CalcBounds(CVisDrawView* pView = NULL);
	//圖元被選擇判斷
	virtual BOOL IsSelected(CVisDrawView* pView, const CPoint& point);


private:
//以下是屬性變量
	//圓弧的起點和終點角度（弧度表示）
	double m_StartAngle,m_EndAngle;
};