// This macro is to be used on a root file produced with the
// event.C selector.


#include "StandardLabels.C"

void Ndarkhits(void)
{
	char fname[256];
	sprintf(fname,"darkhits.root");
	TFile *f = new TFile(fname);
	TH1D *Ndarkhits = (TH1D*)gROOT->FindObject("Ndarkhits");	

	TCanvas *c1 = new TCanvas();
	c1->SetTicks();
	c1->SetGrid();
	
	Ndarkhits->SetStats(0);
	Ndarkhits->GetXaxis()->SetRangeUser(-0.5, 30.5);
	Ndarkhits->SetFillColor(kGreen);
	Ndarkhits->SetFillStyle(3000);
	Ndarkhits->SetLineColor(kBlack);
	Ndarkhits->SetLineWidth(2.0);
	Ndarkhits->Draw();
	
	double xmean = Ndarkhits->GetMean();
	double ymax = Ndarkhits->GetMaximum();
	char str[256];
	sprintf(str, "mean: %3.1f PE", xmean);
	TPaveText *txt = new TPaveText(20.0, 0.5*ymax, 30.0, 0.75*ymax);
	txt->AddText(str);
	txt->Draw();
	
	TLine *l = new TLine(xmean, 0.0, xmean, 1.05*ymax);
	l->SetLineStyle(2);
	l->SetLineWidth(4);
	l->Draw();
		
	StandardLabels1D(Ndarkhits, "From mcsmear");

	c1->SaveAs("Ndarkhits.png");
	c1->SaveAs("Ndarkhits.pdf");
}