RTreeMapPainter.hxx

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/// \file ROOT/RTreeMapPainter.hxx
/// \author Patryk Tymoteusz Pilichowski <patryk.tymoteusz.pilichowski@cern.ch>
/// \date 2025-08-21
/// \warning This is part of the ROOT 7 prototype! It will change without notice. It might trigger earthquakes. Feedback
/// is welcome!
 
/*************************************************************************
 * Copyright (C) 1995-2025, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
 
#ifndef TTREEMAP_HXX
#define TTREEMAP_HXX
 
#include "RTreeMapBase.hxx"
 
#include "TROOT.h"
#include "TObject.h"
#include "TCanvas.h"
#include "TPad.h"
 
#include <vector>
 
namespace ROOT::Experimental {
// clang-format off
/**
\class ROOT::Experimental::RTreeMapPainter
\ingroup TreeMap
\brief Logic for drawing a treemap on a TVirtualPad
 
One can visualize an RNTuple in a TCanvas as a treemap like this:
~~~ {.cpp}
auto tm = ROOT::Experimental::CreateTreeMapFromRNTuple("file.root", "ntuple_name");
auto c = new TCanvas("c_tm","TreeMap");
c->Add(tm.release());
~~~
*/
// clang-format on
class RTreeMapPainter final : public ROOT::Experimental::RTreeMapBase, public TObject {
public:
   struct Node final : public ROOT::Experimental::RTreeMapBase::Node, public TObject {
   public:
      ClassDefOverride(Node, 1);
   };
   RTreeMapPainter() = default;
   void Paint(Option_t *opt) override;
 
   ClassDefOverride(RTreeMapPainter, 1);
 
   ~RTreeMapPainter() override = default;
 
private:
   /////////////////////////////////////////////////////////////////////////////
   /// \brief Logic for drawing a box on TVirtualPad
   void AddBox(const Rect &rect, const RGBColor &color, float borderWidth) const final;
 
   /////////////////////////////////////////////////////////////////////////////
   /// \brief Logic for drawing a text on TVirtualPad
   void AddText(const Vec2 &pos, const std::string &content, float size, const RGBColor &color = RGBColor(0, 0, 0),
                bool alignCenter = false) const final;
};
} // namespace ROOT::Experimental
#endif