/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_5_3_14/src/DQMOffline/RecoB/src/Tools.cc

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#include "DQMOffline/RecoB/interface/Tools.h"

#include "TROOT.h"
#include "TSystem.h"
#include "TStyle.h"
#include <math.h>

using namespace std;
using namespace RecoBTag;

//
//
// TOOLS
//
//


double RecoBTag::HistoBinWidth ( const TH1F * theHisto , const int& iBin ) {
  const int& nBins = theHisto->GetSize() ; // includes underflow/overflow
  // return 0.0 , if invalid bin
  if ( iBin < 0 || iBin >= nBins ) return 0.0 ;
  // return first binwidth, if underflow bin
  if ( iBin == 0 ) return theHisto->GetBinWidth ( 1 ) ;
  // return last real binwidth, if overflow bin
  if ( iBin == nBins - 1 ) return theHisto->GetBinWidth ( nBins - 2 ) ;
  // return binwidth from histo, if within range
  return theHisto->GetBinWidth ( iBin ) ;
}


double RecoBTag::IntegrateHistogram ( const TH1F * theHisto ) {
  // include underflow and overflow: assign binwidth of first/last bin to them!!
  // integral = sum ( entry_i * binwidth_i )
  //
  double histoIntegral = 0.0 ;
  const int&    nBins = theHisto->GetSize() ;
  //
  // loop over bins:
  // bin 0       : underflow
  // bin nBins-1 : overflow
  for ( int iBin = 0 ; iBin != nBins ; ++iBin ) {
    const double& binWidth = HistoBinWidth ( theHisto , iBin )  ;
    histoIntegral += (*theHisto)[iBin] * binWidth ;
  }
  //
  return histoIntegral ;
}




void RecoBTag::HistoToNormalizedArrays ( const TH1F * theHisto , TArrayF & theNormalizedArray , TArrayF & theLeftOfBinArray , TArrayF & theBinWidthArray ) {

  const int& nBins = theHisto->GetSize() ;

  // check that all arrays/histo have the same size
  if  ( nBins == theNormalizedArray.GetSize()   &&
        nBins == theLeftOfBinArray .GetSize()   &&
        nBins == theBinWidthArray  .GetSize()       ) {

    const double& histoIntegral = IntegrateHistogram ( theHisto ) ;

    for ( int iBin = 0 ; iBin != nBins ; ++iBin ) {
      theNormalizedArray[iBin] = (*theHisto)[iBin] / histoIntegral  ;
      theLeftOfBinArray [iBin] = theHisto->GetBinLowEdge(iBin) ;
      theBinWidthArray  [iBin] = HistoBinWidth ( theHisto , iBin )  ;
    }

  }
  else {
    cout << "============>>>>>>>>>>>>>>>>" << endl
         << "============>>>>>>>>>>>>>>>>" << endl
         << "============>>>>>>>>>>>>>>>>" << endl
         << "============>>>>>>>>>>>>>>>>" << endl
         << "============>>>>>>>>>>>>>>>> HistoToNormalizedArrays failed: not equal sizes of all arrays!!" << endl
         << "============>>>>>>>>>>>>>>>>" << endl
         << "============>>>>>>>>>>>>>>>>" << endl
         << "============>>>>>>>>>>>>>>>>" << endl
         << "============>>>>>>>>>>>>>>>>" << endl ;
  }

}



double RecoBTag::IntegrateArray ( const TArrayF & theArray , const TArrayF & theBinWidth ) {

  double arrayIntegral = 0.0 ;
  const int&    nBins = theArray.GetSize() ;
  //
  for ( int iBin = 0 ; iBin != nBins ; ++iBin ) {
    arrayIntegral += theArray[iBin] * theBinWidth[iBin] ;
  }
  //
  return arrayIntegral ;
}



void RecoBTag::PrintCanvasHistos ( TCanvas * canvas , const std::string& psFile , const std::string& epsFile , const std::string& gifFile ) {
  //
  //
  // to create gif in 'batch mode' (non-interactive) see
  // http://root.cern.ch/cgi-bin/print_hit_bold.pl/root/roottalk/roottalk00/0402.html?gifbatch#first_hit
  //
  // ROOT 4 can do it!!??
  //
  // if string = "" don't print to corresponding file
  //
  if ( psFile  != "" ) canvas->Print ( psFile.c_str() ) ;
  if ( epsFile != "" ) canvas->Print ( epsFile.c_str() , "eps" ) ;
  // if in batch: use a converter tool
  const std::string& rootVersion ( gROOT->GetVersion() ) ;
  const bool& rootCanGif = rootVersion.find("4") == 0 || rootVersion.find("5") == 0 ;
  if ( gifFile != "" ) {
    if ( !(gROOT->IsBatch()) || rootCanGif )  { // to find out if running in batch mode
      cout << "--> Print directly gif!" << endl ;
      canvas->Print ( gifFile.c_str() , "gif" ) ;
    }
    else {
      if ( epsFile != "" ) {   // eps file must have been created before
        cout << "--> Print gif via scripts!" << endl ;
        const std::string& executeString1 = "pstopnm -ppm -xborder 0 -yborder 0 -portrait " + epsFile ;
        gSystem->Exec(executeString1.c_str()) ;
        const std::string& ppmFile = epsFile + "001.ppm" ;
        const std::string& executeString2 = "ppmtogif " + ppmFile + " > " + gifFile ;
        gSystem->Exec(executeString2.c_str()) ;
        const std::string& executeString3 = "rm " + ppmFile  ;
        gSystem->Exec(executeString3.c_str()) ; // delete the intermediate file
      }
    }
  }
}


TObjArray RecoBTag::getHistArray ( TFile * histoFile , const std::string& baseName ) {
  //
  // return the TObjArray built from the basename
  //
  //
  TObjArray histos (3) ;  // reserve 3
  //
  const std::string nameB    ( baseName + "B" ) ;
  const std::string nameC    ( baseName + "C" ) ;
  const std::string nameDUSG ( baseName + "DUSG" ) ;
  //
  histos.Add ( (TH1F*)histoFile->Get( nameB.c_str() ) ) ;
  histos.Add ( (TH1F*)histoFile->Get( nameC.c_str() ) ) ;
  histos.Add ( (TH1F*)histoFile->Get( nameDUSG.c_str() ) ) ;
  //
  return histos ;
}


std::string RecoBTag::flavour ( const int& flav ) {
  switch(flav) {
    case 1 : 
      return "d";
    case 2 :
      return "u";
    case 3 : 
      return "s";
    case 4 :
      return "c";
    case 5 : 
      return "b";
    case 21 : 
      return "g";
    default :
      return "";
  }
}


bool RecoBTag::flavourIsD ( const int & flav ) { return flav == 1  ; }
bool RecoBTag::flavourIsU ( const int & flav ) { return flav == 2  ; }
bool RecoBTag::flavourIsS ( const int & flav ) { return flav == 3  ; }
bool RecoBTag::flavourIsC ( const int & flav ) { return flav == 4  ; }
bool RecoBTag::flavourIsB ( const int & flav ) { return flav == 5  ; }
bool RecoBTag::flavourIsG ( const int & flav ) { return flav == 21 ; }

bool RecoBTag::flavourIsDUS  ( const int & flav ) { return ( flavourIsD(flav) || flavourIsU(flav) || flavourIsS(flav) ) ; }
bool RecoBTag::flavourIsDUSG ( const int & flav ) { return ( flavourIsDUS(flav) || flavourIsG(flav) ) ; }

bool RecoBTag::flavourIsNI  ( const int & flav ) { return !( flavourIsD(flav) || flavourIsU(flav) || flavourIsS(flav) ||
                                                 flavourIsC(flav) || flavourIsB(flav) || flavourIsG(flav)    ) ; }

int  RecoBTag::checkCreateDirectory ( const std::string& directory ) {
  cout << "====>>>> ToolsC:checkCreateDirectory() : " << endl ;
  int exists = gSystem->Exec ( ("ls -d " + directory).c_str() ) ;
  // create it if it doesn't exist
  if ( exists != 0 ) {
    cout << "====>>>> ToolsC:checkCreateDirectory() : The directory does not exist : " << directory << endl ;
    cout << "====>>>> ToolsC:checkCreateDirectory() : I'll try to create it" << endl ;
    const int& create = gSystem->Exec ( ("mkdir " + directory).c_str() ) ;
    if ( create != 0 ) {
      cout << "====>>>> ToolsC:checkCreateDirectory() : Creation of directory failed : " << directory << endl
           << "====>>>> ToolsC:checkCreateDirectory() : Please check your write permissions!" << endl ;
    }
    else {
      cout << "====>>>> ToolsC:checkCreateDirectory() : Creation of directory successful!" << endl ;
      // check again if it exists now
      cout << "====>>>> ToolsC:checkCreateDirectory() : " << endl ;
      exists = gSystem->Exec ( ("ls -d " + directory).c_str() ) ;
      if ( exists != 0 ) cout << "ToolsC:checkCreateDirectory() : However, it still doesn't exist!?" << endl ;
    }
  }
  cout << endl ;
  return exists ;
}



int RecoBTag::findBinClosestYValue ( const TH1F * histo , const float& yVal , const float& yLow , const float& yHigh ) {
  //
  // Find the bin in a 1-dim. histogram which has its y-value closest to
  // the given value yVal where the value yVal has to be in the range yLow < yVal < yHigh.
  // If it is outside this range the corresponding bin number is returned as negative value.
  // Currently, there is no protection if there are many bins with the same value!
  // Teh user has to take care to interpret the output correctly.
  //

  // init
  const int&   nBins = histo->GetNbinsX() - 2 ; // -2 because we don't include under/overflow alos in this loop
  int   iBinClosestInit = 0    ;
  // init start value properly: must avoid that the real one is not filled
  float yClosestInit ;
  //
  const float& maxInHisto = histo->GetMaximum() ;
  const float& minInHisto = histo->GetMinimum() ;
  //
  // if yVal is smaller than max -> take any value well above the maximum
  if ( yVal <= maxInHisto ) {
    yClosestInit = maxInHisto + 1 ; }
  else {
    // if yVal is greater than max value -> take a value < minimum
    yClosestInit = minInHisto - 1.0 ;
  }

  int   iBinClosest = iBinClosestInit ;
  float yClosest    = yClosestInit ;

  // loop over bins of histogram
  for ( int iBin = 1 ; iBin <= nBins ; ++iBin ) {
    const float& yBin = histo->GetBinContent(iBin) ;
    if ( fabs(yBin-yVal) < fabs(yClosest-yVal) ) {
      yClosest = yBin  ;
      iBinClosest = iBin ;
    }
  }

  // check if in interval
  if ( yClosest < yLow  || yClosest > yHigh ) {
    iBinClosest *= -1 ;
  }

  // check that not the initialization bin (would mean that init value was the closest)
  if ( iBinClosest == iBinClosestInit ) {
    cout << "====>>>> ToolsC=>findBinClosestYValue() : WARNING: returned bin is the initialization bin!!" << endl ;
  }

  return iBinClosest ;
}



TStyle* RecoBTag::setTDRStyle() {
  TStyle *tdrStyle = new TStyle("tdrStyle","Style for P-TDR");

// For the canvas:
  tdrStyle->SetCanvasBorderMode(0);
  tdrStyle->SetCanvasColor(kWhite);
  tdrStyle->SetCanvasDefH(600); //Height of canvas
  tdrStyle->SetCanvasDefW(600); //Width of canvas
  tdrStyle->SetCanvasDefX(0);   //POsition on screen
  tdrStyle->SetCanvasDefY(0);

// For the Pad:
  tdrStyle->SetPadBorderMode(0);
  // tdrStyle->SetPadBorderSize(Width_t size = 1);
  tdrStyle->SetPadColor(kWhite);
  tdrStyle->SetPadGridX(false);
  tdrStyle->SetPadGridY(false);
  tdrStyle->SetGridColor(0);
  tdrStyle->SetGridStyle(3);
  tdrStyle->SetGridWidth(1);

// For the frame:
  tdrStyle->SetFrameBorderMode(0);
  tdrStyle->SetFrameBorderSize(1);
  tdrStyle->SetFrameFillColor(0);
  tdrStyle->SetFrameFillStyle(0);
  tdrStyle->SetFrameLineColor(1);
  tdrStyle->SetFrameLineStyle(1);
  tdrStyle->SetFrameLineWidth(1);

// For the histo:
  // tdrStyle->SetHistFillColor(1);
  // tdrStyle->SetHistFillStyle(0);
  tdrStyle->SetHistLineColor(1);
  tdrStyle->SetHistLineStyle(0);
  tdrStyle->SetHistLineWidth(1);
  // tdrStyle->SetLegoInnerR(Float_t rad = 0.5);
  // tdrStyle->SetNumberContours(Int_t number = 20);

  tdrStyle->SetEndErrorSize(15);
//   tdrStyle->SetErrorMarker(20);
  tdrStyle->SetErrorX(1);
  
  tdrStyle->SetMarkerStyle(21);
  tdrStyle->SetMarkerSize(1.);

//For the fit/function:
  tdrStyle->SetOptFit(0);
  tdrStyle->SetFitFormat("5.4g");
  tdrStyle->SetFuncColor(2);
  tdrStyle->SetFuncStyle(1);
  tdrStyle->SetFuncWidth(1);

//For the date:
  tdrStyle->SetOptDate(0);
  // tdrStyle->SetDateX(Float_t x = 0.01);
  // tdrStyle->SetDateY(Float_t y = 0.01);

// For the statistics box:
  tdrStyle->SetOptFile(1111);
  tdrStyle->SetOptStat(0); // To display the mean and RMS:   SetOptStat("mr");
  tdrStyle->SetStatColor(kWhite);
  tdrStyle->SetStatFont(42);
  tdrStyle->SetStatFontSize(0.025);
  tdrStyle->SetStatTextColor(1);
  tdrStyle->SetStatFormat("6.4g");
  tdrStyle->SetStatBorderSize(1);
  tdrStyle->SetStatH(0.2);
  tdrStyle->SetStatW(0.15);
  // tdrStyle->SetStatStyle(Style_t style = 1001);
  // tdrStyle->SetStatX(Float_t x = 0);
  // tdrStyle->SetStatY(Float_t y = 0);

// Margins:
  tdrStyle->SetPadTopMargin(0.05);
  tdrStyle->SetPadBottomMargin(0.13);
  tdrStyle->SetPadLeftMargin(0.16);
  tdrStyle->SetPadRightMargin(0.02);

// For the Global title:

  tdrStyle->SetOptTitle(0);
  tdrStyle->SetTitleW(0.8); // Set the width of the title box

  tdrStyle->SetTitleFont(42);
  tdrStyle->SetTitleColor(1);
  tdrStyle->SetTitleTextColor(1);
  tdrStyle->SetTitleFillColor(10);
  tdrStyle->SetTitleFontSize(0.05);
  // tdrStyle->SetTitleH(0); // Set the height of the title box
  // tdrStyle->SetTitleX(0); // Set the position of the title box
  // tdrStyle->SetTitleY(0.985); // Set the position of the title box
  // tdrStyle->SetTitleStyle(Style_t style = 1001);
  // tdrStyle->SetTitleBorderSize(2);

// For the axis titles:

  tdrStyle->SetTitleColor(1, "XYZ");
  tdrStyle->SetTitleFont(42, "XYZ");
  tdrStyle->SetTitleSize(0.06, "XYZ");
  // tdrStyle->SetTitleXSize(Float_t size = 0.02); // Another way to set the size?
  // tdrStyle->SetTitleYSize(Float_t size = 0.02);
  tdrStyle->SetTitleXOffset(0.75);
  tdrStyle->SetTitleYOffset(0.75);
  // tdrStyle->SetTitleOffset(1.1, "Y"); // Another way to set the Offset

// For the axis labels:

  tdrStyle->SetLabelColor(1, "XYZ");
  tdrStyle->SetLabelFont(42, "XYZ");
  tdrStyle->SetLabelOffset(0.007, "XYZ");
  tdrStyle->SetLabelSize(0.05, "XYZ");

// For the axis:

  tdrStyle->SetAxisColor(1, "XYZ");
  tdrStyle->SetStripDecimals(kTRUE);
  tdrStyle->SetTickLength(0.03, "XYZ");
  tdrStyle->SetNdivisions(510, "XYZ");
  tdrStyle->SetPadTickX(1);  // To get tick marks on the opposite side of the frame
  tdrStyle->SetPadTickY(1);

// Change for log plots:
  tdrStyle->SetOptLogx(0);
  tdrStyle->SetOptLogy(0);
  tdrStyle->SetOptLogz(0);

// Postscript options:
   tdrStyle->SetPaperSize(21.,28.);
//  tdrStyle->SetPaperSize(20.,20.);
  // tdrStyle->SetLineScalePS(Float_t scale = 3);
  // tdrStyle->SetLineStyleString(Int_t i, const char* text);
  // tdrStyle->SetHeaderPS(const char* header);
  // tdrStyle->SetTitlePS(const char* pstitle);

  // tdrStyle->SetBarOffset(Float_t baroff = 0.5);
  // tdrStyle->SetBarWidth(Float_t barwidth = 0.5);
  // tdrStyle->SetPaintTextFormat(const char* format = "g");
  // tdrStyle->SetPalette(Int_t ncolors = 0, Int_t* colors = 0);
  // tdrStyle->SetTimeOffset(Double_t toffset);
  // tdrStyle->SetHistMinimumZero(kTRUE);

  tdrStyle->cd();
  return tdrStyle;
}
// tdrGrid: Turns the grid lines on (true) or off (false)

void RecoBTag::tdrGrid(const bool& gridOn) {
  TStyle *tdrStyle = setTDRStyle();
  tdrStyle->SetPadGridX(gridOn);
  tdrStyle->SetPadGridY(gridOn);
  tdrStyle->cd();
}

// fixOverlay: Redraws the axis

void RecoBTag::fixOverlay() {
  gPad->RedrawAxis();
}


string RecoBTag::itos(const int& i)     // convert int to string
{
        ostringstream s;
        s << i;
        return s.str();
}