#include "TFile.h"
#include "TCanvas.h"
#include "TStyle.h"
#include "TH1.h"
#include "TH2.h"
#include "TH3.h"
#include "TGaxis.h"
#include "TRandom.h"
#include "TLegend.h"
#include "TPaveStats.h"
#include "TGraph.h"
#include "TSystem.h"
#include "TTree.h"
#include "TTreePlayer.h"
#include "TF1.h"
#include <iostream>
#include <vector>
#include <fstream>
#include "TCut.h"

int subdett=31;
int mup=-13;
int mum=13;
float fillcolor=0.35;
void deltaxhitb21()
{
   gStyle->SetOptStat(111110);
   TFile *fin = TFile::Open("mu-_No_target/setup/build/LemmaMC.root");
   fin->ls ();
   if (fin == 0) {
      printf("Error: cannot open the file!\n");
   } else {
		TTree *t=0;
            fin->GetObject("LEMMA",t);
            t->SetScanField(0);
            TCanvas *c01 = new TCanvas("c01","",1280,1024);
           // c01->SetLogy();
            t->SetLineColor(kBlue);
            t->AddFriend("LEMMA1=LEMMA", "mu+_No_target/setup/build/LemmaMC.root");
            TH1F *hhit = new TH1F("hhit", "", 100, 0., 0.);
            TString outputname = TString::Format("Delta_xhit_mu-_mu+_subdet=%d.png",subdett);
        	TString hhitstring = TString::Format("LEMMA.xhit-LEMMA1.xhit>> hhit");
			TCut Idpmup = TString::Format("Idp==%d", mup).Data();
			TCut Idpmum = TString::Format("Idp==%d", mum).Data();
			TCut subdet = TString::Format("subdet==%d", subdett).Data();
            t->Draw(hhitstring, subdet);
            gPad->Modified();
            gPad->Update(); // make sure it's really (re)drawn
            t->GetHistogram()->SetTitle("");
            hhit->GetXaxis()->SetTitle("#Deltax position (mm)");
            hhit->GetYaxis()->SetTitle("Counts");
            hhit->GetXaxis()->SetLabelFont(43);
            hhit->GetXaxis()->SetLabelSize(30);
            hhit->GetYaxis()->SetLabelFont(43);
            hhit->GetYaxis()->SetLabelSize(30);
            hhit->GetXaxis()->SetTitleFont(43);
            hhit->GetXaxis()->SetTitleSize(30);
            hhit->GetYaxis()->SetTitleFont(43);
            hhit->GetYaxis()->SetTitleSize(30);
            hhit->SetFillColorAlpha(kBlue, fillcolor);
            hhit->SetName("Title");
            hhit->SetStats(0);
            gPad->Modified();
            gPad->Update(); // make sure it's really (re)drawn
            /*TLegend* leg = new TLegend(0.65, 0.7, .75, .75);
            leg->SetHeader("Legend");
            leg->SetNColumns(1);
            leg->AddEntry(hhit, "Data", "l");
            leg->Draw();*/
            gPad->Update();
          /* TPaveStats *stats = (TPaveStats*)hhit->GetListOfFunctions()->FindObject("stats");
            stats->SetTextColor(kBlue);
            stats->SetX1NDC(0.80); stats->SetX2NDC(0.98);
            stats->SetY1NDC(0.77); stats->SetY2NDC(0.92);*/
            gPad->Update();
			c01->Print(outputname);
            delete c01;     
	}
}