HistoLabels.cpp

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* (c) Copyright 1998-2025 CERN for the benefit of the LHCb and ATLAS collaborations *
*                                                                                   *
* This software is distributed under the terms of the Apache version 2 licence,     *
* copied verbatim in the file "LICENSE".                                            *
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// Include files
 
//-----------------------------------------------------------------------------
// Implementation file for class : HistoLabels
//-----------------------------------------------------------------------------
 
// local
#include <GaudiUtils/Aida2ROOT.h>
#include <GaudiUtils/HistoLabels.h>
 
// ============================================================================
// ROOT
// ============================================================================
#include <TH1D.h>
#include <TH2D.h>
#include <TProfile.h>
#include <TProfile2D.h>
 
// Private namespace
namespace {
  //--------------------------------------------------------------------
 
  template <typename R, typename A>
  bool setAxisLabels_( A* aida, const std::string& xAxis, const std::string& yAxis ) {
    if ( !aida ) return false;
    R* root = Gaudi::Utils::Aida2ROOT::aida2root( aida );
    if ( !root ) return false;
    root->SetXTitle( xAxis.c_str() );
    root->SetYTitle( yAxis.c_str() );
    return true;
  }
 
  //--------------------------------------------------------------------
 
  bool setBinLabels_( TAxis* axis, const Gaudi::Utils::Histos::BinLabels& labels ) {
    if ( !axis ) return false;
    const unsigned nbins = axis->GetNbins();
    for ( const auto& i : labels ) {
      if ( 1 + i.first <= 0 || 1 + i.first > nbins ) return false;
      // Argh... ROOT bins start counting at '1' instead of '0'
      axis->SetBinLabel( 1 + i.first, i.second.c_str() );
    }
    return true;
  }
 
  //--------------------------------------------------------------------
 
  template <typename R, typename A>
  bool setBinLabels_( A* aida, const Gaudi::Utils::Histos::BinLabels& labels ) {
    if ( !aida ) return false;
    R* root = Gaudi::Utils::Aida2ROOT::aida2root( aida );
    if ( !root ) return false;
    return setBinLabels_( root->GetXaxis(), labels );
  }
 
  template <typename Histogram>
  bool setBinLabels_( Histogram* hist, const Gaudi::Utils::Histos::Labels& labels ) {
    Gaudi::Utils::Histos::BinLabels l;
    l.reserve( labels.size() );
    for ( unsigned i = 0; i < labels.size(); ++i ) l.emplace_back( i, labels[i] );
    return Gaudi::Utils::Histos::setBinLabels( hist, l );
  }
 
  //--------------------------------------------------------------------
} // namespace
 
namespace Gaudi {
  namespace Utils {
    namespace Histos {
 
      // --------------------------------------------------------------------------
 
      bool setBinLabels( AIDA::IHistogram1D* hist, const BinLabels& labels ) {
        return setBinLabels_<TH1D>( hist, labels );
      }
 
      bool setBinLabels( AIDA::IProfile1D* hist, const BinLabels& labels ) {
        return setBinLabels_<TProfile>( hist, labels );
      }
 
      bool setBinLabels( AIDA::IHistogram1D* hist, const Labels& labels ) { return setBinLabels_( hist, labels ); }
 
      bool setBinLabels( AIDA::IProfile1D* hist, const Labels& labels ) { return setBinLabels_( hist, labels ); }
 
      bool setBinLabels( AIDA::IHistogram2D* hist, const Labels& xlabels, const Labels& ylabels ) {
        if ( !hist ) return false;
        TH2D* h2d = Gaudi::Utils::Aida2ROOT::aida2root( hist );
        if ( !h2d ) return false;
        BinLabels lx;
        lx.reserve( xlabels.size() );
        for ( unsigned int i = 0; i < xlabels.size(); ++i ) { lx.emplace_back( i, xlabels[i] ); }
        BinLabels ly;
        ly.reserve( ylabels.size() );
        for ( unsigned int i = 0; i < ylabels.size(); ++i ) { ly.emplace_back( i, ylabels[i] ); }
        return ( setBinLabels_( h2d->GetXaxis(), lx ) && setBinLabels_( h2d->GetYaxis(), ly ) );
      }
 
      bool setBinLabels( AIDA::IHistogram2D* hist, const BinLabels& xlabels, const BinLabels& ylabels ) {
        TH2D* h2d = Gaudi::Utils::Aida2ROOT::aida2root( hist );
        return ( h2d && setBinLabels_( h2d->GetXaxis(), xlabels ) && setBinLabels_( h2d->GetYaxis(), ylabels ) );
      }
 
      bool setBinLabels( AIDA::IProfile2D* hist, const Labels& xlabels, const Labels& ylabels ) {
        if ( !hist ) return false;
        TProfile2D* h2d = Gaudi::Utils::Aida2ROOT::aida2root( hist );
        if ( !h2d ) return false;
        BinLabels lx;
        lx.reserve( xlabels.size() );
        for ( unsigned int i = 0; i < xlabels.size(); ++i ) { lx.emplace_back( i, xlabels[i] ); }
        BinLabels ly;
        ly.reserve( ylabels.size() );
        for ( unsigned int i = 0; i < ylabels.size(); ++i ) { ly.emplace_back( i, ylabels[i] ); }
        return ( setBinLabels_( h2d->GetXaxis(), lx ) && setBinLabels_( h2d->GetYaxis(), ly ) );
      }
 
      bool setBinLabels( AIDA::IProfile2D* hist, const BinLabels& xlabels, const BinLabels& ylabels ) {
        TProfile2D* h2d = Gaudi::Utils::Aida2ROOT::aida2root( hist );
        return ( h2d && setBinLabels_( h2d->GetXaxis(), xlabels ) && setBinLabels_( h2d->GetYaxis(), ylabels ) );
      }
 
      // --------------------------------------------------------------------------
 
      bool setAxisLabels( AIDA::IHistogram1D* hist, const std::string& xAxis, const std::string& yAxis ) {
        return setAxisLabels_<TH1D>( hist, xAxis, yAxis );
      }
 
      bool setAxisLabels( AIDA::IProfile1D* hist, const std::string& xAxis, const std::string& yAxis ) {
        return setAxisLabels_<TProfile>( hist, xAxis, yAxis );
      }
 
      bool setAxisLabels( AIDA::IHistogram2D* hist, const std::string& xAxis, const std::string& yAxis ) {
        return setAxisLabels_<TH2D>( hist, xAxis, yAxis );
      }
 
      bool setAxisLabels( AIDA::IProfile2D* hist, const std::string& xAxis, const std::string& yAxis ) {
        return setAxisLabels_<TProfile2D>( hist, xAxis, yAxis );
      }
 
      // --------------------------------------------------------------------------
    } // namespace Histos
  }   // namespace Utils
} // namespace Gaudi