// $Id$
//
//    File: DHistogram.h
// Created: Mon Aug  1 08:56:58 EDT 2011
// Creator: davidl (on Linux ifarm1102 2.6.18-128.7.1.el5 x86_64)
//

#ifndef _DHistogram_
#define _DHistogram_

#include <TH1.h>

#include <JANA/jerror.h>

class DHistogram{
	public:
		DHistogram(int Nbins, double lowEdge, double highEdge);
		virtual ~DHistogram();
		
		void Add(const DHistogram *h);
		
		double Fill(double x, double weight=1.0);
		int FindBin(double x) const;
		int FindFirstBinAbove(double val) const;
		
		int GetNbins(void) const;
		double GetBinLowEdge(int bin) const;
		double GetBinCenter(int bin) const;
		double GetBinContent(int bin) const;
		double GetBinWidth(void) const;
		
		double Integral(void) const;
		TH1D* MakeTH1D(string name, string title) const;
		
		void Reset(void);
		void Scale(double scale);
		void SetBinContent(int bin, double val);
		
	protected:
	
	
	private:
		DHistogram(); // prevent default constructor usage
	
		int Nbins;
		double lowEdge;
		double highEdge;
		double binWidth;
		double half_binWidth;

		double *content;
		double *xvals; // bin center
};

#endif // _DHistogram_