#pragma once
#include <vector>

class  CDC;
class  CDC;
class  CCurveEx;
class  CSigmaDoc;
struct HandlePoint;

class HandleDrawer
{
public:
	HandleDrawer(CSigmaDoc * pDoc);
	~HandleDrawer();

	bool Init(CCurveEx * pCurve);
	void ClearAll(CDC * pDC);
	void DrawAll(CDC * pDC);
	void ReDrawAll(CDC * pDC);
	void DrawOneHandle(CDC * pDC, int indexOfHandle);
	void DrawFocusHandle(CDC * pDC, int indexOfHandle);
	//返回值:擦除节点的索引 出错或没有焦点Handle 则返回 -1
	int  EreaseFocusHandle(CDC * pD);
protected:
	void DrawAllOrEreaseAll(CDC * pDC, bool bDrawAll);
	//bDraw-true 绘制节点 false-擦除节点  bFocus-true 是焦点Handle false-普通Handle
	void DrawOrEreaseOneHandle(CDC * pDC, HandlePoint * handlePt, bool bDraw, bool bFocus);
	void DrawHandle(CDC* pDC, HandlePoint * handlePt, bool bFocus);
	void Release();
private:
	COLORREF m_colorHandles;
	COLORREF m_headColor;
	CSigmaDoc * m_pDoc;
	HandlePoint * m_focusHandle;
	std::vector<HandlePoint *> m_handlePts;
};