#pragma once
#include "HTrackerCommon.h"
#include "HTrackerHandleCalculator.h"
//计算HTracker的变换矩阵

class HTrackerTransform
{
public:
	HTrackerTransform();
	void Init(int handle, const CRect & boundRect, CPoint mousePt);
	void Draging(CPoint mousePt);
	void EndDrag();
	Gdiplus::Matrix * GetMatrix();
	//设置变换的类型
	void SetKind(HTRACKER_TRANSFORM_KIND kind);
protected:
	void SetFixedPoints();
	void Scale(CPoint & point);
	void Move(CPoint & point);
	bool IsCanMove(const CPoint& nPrevPoint, const CPoint& nCurPoint);
	void Rotate(CPoint & point);
	void Shear(CPoint & point);
private:
	bool   m_bDrag;
	int    m_handle;
	CPoint m_StartPoint;                      //开始拖拽时，鼠标的坐标。
	CRect  m_boundRect;                        //tracker的外包矩形
	CPoint m_FixedSrc;
	CPoint m_FixedDest;
	bool   m_bCanMoved;
	int    m_nAllowMovePixel;
	Gdiplus::Matrix m_Transform;
	Gdiplus::REAL   m_StartPhi;
	HTrackerHandleCalculator m_calculator;
	HTRACKER_TRANSFORM_KIND   m_kind;
};