RHistDrawable.cxx

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/// \file RHistDrawable.cxx
/// \ingroup Hist ROOT7
/// \author Axel Naumann <axel@cern.ch>
/// \date 2015-09-11
/// \warning This is part of the ROOT 7 prototype! It will change without notice. It might trigger earthquakes. Feedback
/// is welcome!
 
/*************************************************************************
 * Copyright (C) 1995-2015, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
 
#include "ROOT/RHistDrawable.hxx"
 
#include "ROOT/RHistImpl.hxx"
 
#include "TSystem.h" // RSystem::Load
 
#include <cassert>
 
using namespace ROOT::Experimental;
using namespace ROOT::Experimental::Internal;
 
void ROOT::Experimental::Internal::LoadHistPainterLibrary()
{
   gSystem->Load("libHistPainter");
}
 
template <int DIMENSION>
RHistPainterBase<DIMENSION>::RHistPainterBase()
{
   GetPainterPtr() = this;
}
 
template <int DIMENSION>
RHistPainterBase<DIMENSION>::~RHistPainterBase()
{
   GetPainterPtr() = nullptr;
}
 
template <int DIMENSION>
RHistPainterBase<DIMENSION> *&RHistPainterBase<DIMENSION>::GetPainterPtr()
{
   static RHistPainterBase<DIMENSION> *painter = nullptr;
 
   return painter;
}
 
template <int DIMENSION>
RHistPainterBase<DIMENSION> *RHistPainterBase<DIMENSION>::GetPainter()
{
   // Trigger loading of the painter library within the init guard of the static:
   static int triggerLibLoad = (LoadHistPainterLibrary(), 0);
 
   (void)triggerLibLoad; // unused.
 
   return GetPainterPtr();
}
 
template <class DERIVED>
void RHistDrawableBase<DERIVED>::PopulateMenu(RMenuItems &)
{
   // here should be filling of context menu for the given object
}
 
// GCC 5 needs to have that outlined - is that a compiler bug?
template <int DIMENSIONS>
RHistDrawable<DIMENSIONS>::RHistDrawable() = default;
 
/// Paint the histogram
template <int DIMENSIONS>
void RHistDrawable<DIMENSIONS>::Paint(Internal::RPadPainter &pad)
{
   Internal::RHistPainterBase<DIMENSIONS>::GetPainter()->Paint(*this, fOpts, pad);
}
 
namespace ROOT {
namespace Experimental {
 
namespace Internal {
template class RHistPainterBase<1>;
template class RHistPainterBase<2>;
template class RHistPainterBase<3>;
} // namespace Internal
 
template <class DERIVED>
RHistDrawableBase<DERIVED>::~RHistDrawableBase() = default;
 
template class RHistDrawableBase<RHistDrawable<1>>;
template class RHistDrawableBase<RHistDrawable<2>>;
template class RHistDrawableBase<RHistDrawable<3>>;
 
template class RHistDrawable<1>;
template class RHistDrawable<2>;
template class RHistDrawable<3>;
} // namespace Experimental
} // namespace ROOT