//////////////////////////////////////////////////////////////////////////////
//文件: CItem类扩展
//主要功能: 
//		操作各类元素或完成一定的功能
//
//程序编写:		2006-12-07
//
//
/////////////////////////////////////////////////////////////////////////////

#pragma once
#include "item.h"
#include "SpatialIndex.h"


namespace NItem
{
#define PEN_COLOR	RGB(255,0,0)

#define CURVE_STATE_LINE	0
#define CURVE_STATE_ARC		1
#define CURVE_STATE_ANGLE	2
#define CURVE_STATE_SPLINE	3
#define CURVE_STATE_MERGE	4	//合并坐标功能
#define CURVE_STATE_DRAWING	5


class CItemCurve :
	public CItem
{
public:
	CItemCurve(CSigmaDoc * ppDoc);
	virtual ~CItemCurve(void);

	BOOL OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message) override;
	void OnLButtonDblClk(UINT nFlags, CPoint point) override;
	void OnLButtonDown(CDC *pDC, UINT nFlags, CPoint point, int vk) override;
	void RemoveAssistantLineTailPoint();
	int OnMouseMove(CDC* pDC, UINT nFlags, CPoint point) override;
	void DrawAssistant(CDC * pScreenDC, int mouseX, int mouseY) override;//图件屏幕重绘后，重绘临时线
	void OnLButtonUp(CDC* pDC, UINT nFlags, CPoint point, int vk) override;
	BOOL OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags) override;
	BOOL OnKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags) override;
	virtual void OnDraw(CXyDC* pXyDC, CDC* pDC) override;
	int  GetSubMenu() override;
	virtual void SetCurveState(int state, CDC * pDC);
	void RestoreCurveState(void);

	dfPoint GetRealPoint(CPointList& pl, UINT nFlags, CPoint point);
	static int PopupNameDialog(CXy* pxy, POSITION pos);
	void Reset(void);
	virtual void OnCancel(void) override;

	bool GetAngleAndDistance(double &angle, double &distance) const;
	
protected:
	class REDO_ITEM
	{
	public:
		REDO_ITEM(void)
		{
			num=1;
			bHead=FALSE;
			pos=NULL;
		};
		dfPoint point;
		BOOL bHead;		//FALSE为结尾Redo,TRUE为开始Redo
		int num;		//Redo的点个数
		POSITION pos;	//PointList中的位置，NULL表示删除点，否则表示增加点
	};
	CList<REDO_ITEM,REDO_ITEM> RedoList,UndoList;
	CPen m_pen;
	BOOL    m_bStretchStart;
	dfPoint CurPoint;


	
	void GetAnglePoint(dfPoint &ddp, double angle);

private:
	void storeAngleAndDistance(dfPoint& point1, dfPoint& point2);
	void clearAngleAndDistance();

	// 记录当前画线当前点和前一个点的角度
	double m_angle = std::numeric_limits<double>::quiet_NaN();
	// 记录当前画线当前点和前一个点的距离
	double m_distance = std::numeric_limits<double>::quiet_NaN();

public:
	int m_oldLineState;
	int m_AddLineState;
	CPointList PointList;
	dfPoint m_dpLastMousePos;
	BOOL m_bContinuePen;
	BOOL m_bAuxiliaryCurveRedraw;//全图重绘，重画的临时线，包括橡皮筋线
	
	virtual void AutoClose(void);
	virtual void AddPoint(dfPoint point);
	virtual POSITION AddPoint(dfPoint point, BOOL bHead);
	virtual int RemoveAt(POSITION pos);
	POSITION InsertPointWithPointDistance(double x, double y);
	void AddPointFromCoordinate(double x, double y);
	void Draw(CXyDC* pDC, CPointList& pl, COLORREF color);
	void DrawAssistantCurve();
	void DrawAssistantLineLastSegment();
	void RemoveAssistantLineFirstPoint();
	void DrawRubberLine();
	void EraseRubberLine();
	void EraseAuxiliaryLines(CDC * pScreenDC);
	void EraseScreenLines();
	void RedrawScreenLines();
	virtual POSITION NextCurve(void);
	virtual void Undo(void);
	virtual void Redo(void);
	virtual BOOL IsCanUndo(void);
	virtual BOOL IsCanRedo(void);
	void ClearRedoList(void);
	BOOL IsLineState(void);
	COne* CItemCurve::CreateOne();

	double m_isSnapEnabled = true;
	double m_snapRange = 20.0;

	// 这里用指针是为了能够延迟构造 CSpatialIndex，尽管我们目前仍然是构造函数里面构造的
	// 后面会在 CXy 中统一构造空间索引，到时这个就不需要了
	std::unique_ptr<CSpatialIndex> m_pSpatialIndex;
	//void OnMouseMove(UINT nFlags, CPoint point);
};

};