//////////////////////////////////////////////////////////////////////////////
//文件: 刻度步长自动展示
//主要功能: 
//    
//程序编写:		2011-11-15
//
//
/////////////////////////////////////////////////////////////////////////////

#pragma once
#include "TInterval.h"

// 为了获得标尺上的刻度分布方式，使显示效果更好
class AFX_EXT_CLASS CAxisLayout
{
public:
	CAxisLayout();

	// Init with explicit layout
	CAxisLayout(double start_, double stop_, double step_);
	CAxisLayout(TIntervalStep<double> is);

	// Returns 'modulo' end with this sd and stop
	double	findEnd(double datastop) const;

	// Have layout calculated
	void	setDataRange(const TIntervalStep<double>& dr);
	void	setDataRange(double start_, double stop_, double step_);

	TIntervalStep<double>	sd;

public:
	class AFX_EXT_CLASS CLinScaler
	{
	public:
		CLinScaler(double x0, double y0, double x1, double y1);

		void		setValue(double x0, double y0, double x1, double y1);

		double		scale(double) const;
		double		unScale(double) const;

		double		constant;
		double		factor;
	};
};