//Circle.h 圖形元圓類的聲明文檔
#pragma once
#include "figureobj.h"

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

public:

	//下面是構(gòu)造函數(shù)
	CCircleObj(const CRect& position);
	virtual ~CCircleObj(void);

//下面是實(shí)現(xiàn)函數(shù)
	virtual void Draw(CVisDrawView* pView, CDC* pDC);
	virtual void Serialize(CArchive& ar);

//下面是操作函數(shù)
	//計(jì)算矩形圖元的邊界矩形
	virtual CRect CalcBounds(CVisDrawView* pView);
	double CalcRadium(double ptx, double pty);
	void SetRadium(double radium);
	double GetRadium(void);
	void SetCenterPoint(double ptx, double pty);
	void GetCenterPoint(double& ptx, double& pty);

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

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

	//圖元拾取判斷
	virtual BOOL IsSelected(CVisDrawView* pView, const CPoint& point);

//成員變量
protected:
	double m_CenterPointx, m_CenterPointy;  //圓心坐標(biāo)
	double m_Radium;                        //半徑

};