#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>

float fillcolor=0.35;
void idpartb21()
{
   gStyle->SetOptStat(111110);
   gSystem->mkdir(TString::Format("graph"), kTRUE);
   TFile *fin = TFile::Open("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);
            TString outputname = TString::Format("graph/Idp.pdf");
        	TString hidpstring = TString::Format("Idp >> htemp(100., 0., 0.)");
            t->Draw(hidpstring);
            gPad->Modified();
            gPad->Update(); // make sure it's really (re)drawn
            t->GetHistogram()->SetTitle("");
            TH1F *hidp = (TH1F*)gPad->GetPrimitive("htemp");
            hidp->SetFillStyle(1001);
            hidp->GetXaxis()->SetTitle("Energy (GeV)");
            hidp->GetYaxis()->SetTitle("Counts");
            hidp->GetXaxis()->SetLabelFont(43);
            hidp->GetXaxis()->SetLabelSize(30);
            hidp->GetYaxis()->SetLabelFont(43);
            hidp->GetYaxis()->SetLabelSize(30);
            hidp->GetXaxis()->SetTitleFont(43);
            hidp->GetXaxis()->SetTitleSize(30);
            hidp->GetYaxis()->SetTitleFont(43);
            hidp->GetYaxis()->SetTitleSize(30);
            hidp->SetFillColorAlpha(kBlue, fillcolor);
            hidp->Draw();
            hidp->SetName("Title");
            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(hidp, "Data", "l");
            leg->Draw();
            gPad->Update();
            TPaveStats *stats = (TPaveStats*)hidp->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;
         }
      }