TObjectDisplayItem.hxx

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/*************************************************************************
 * Copyright (C) 1995-2021, 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 ROOT7_TObjectDisplayItem
#define ROOT7_TObjectDisplayItem
 
#include <ROOT/RDisplayItem.hxx>
#include <ROOT/RDrawable.hxx>
 
#include <string>
#include <vector>
#include <algorithm>
 
#include "TObject.h"
 
namespace ROOT {
namespace Experimental {
 
 
/** \class TObjectDisplayItem
\ingroup GpadROOT7
\brief Display item for TObject with drawing options
\author Sergey Linev <s.linev@gsi.de>
\date 2017-05-31
\warning This is part of the ROOT 7 prototype! It will change without notice. It might trigger earthquakes. Feedback is welcome!
*/
 
class TObjectDisplayItem : public RIndirectDisplayItem {
protected:
 
   int fKind{0};                           ///< object kind
   const TObject *fObject{nullptr};        ///< ROOT6 object
   std::string fCssType;                   ///< CSS type
   bool fOwner{false};                     ///<! if object must be deleted
   std::vector<int> fColIndex;             ///< stored color index
   std::vector<std::string> fColValue;     ///< stored color value
 
public:
 
   /// normal constructor, also copies drawable id and csstype
   TObjectDisplayItem(const RDrawable &dr, int kind, const TObject *obj) : RIndirectDisplayItem(dr)
   {
      fCssType = dr.GetCssType();
      fKind = kind;
      fObject = obj;
   }
 
   /// constructor for special objects like palette, takes ownership!!
   TObjectDisplayItem(int kind, const TObject *obj) : RIndirectDisplayItem()
   {
      fKind = kind;
      fObject = obj;
      fOwner = true;
   }
 
   ~TObjectDisplayItem() override
   {
      if (fOwner) delete fObject;
   }
 
   void UpdateColor(int color_indx, const std::string &color_value)
   {
      auto pos = std::find(fColIndex.begin(), fColIndex.end(), color_indx);
      if (pos == fColIndex.end()) {
         fColIndex.emplace_back(color_indx);
         fColValue.emplace_back(color_value);
      } else {
         auto indx = pos - fColIndex.begin();
         fColValue[indx] = color_value;
      }
   }
 
};
 
} // namespace Experimental
} // namespace ROOT
 
#endif