TObjectDrawable.hxx

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/*************************************************************************
 * Copyright (C) 1995-2017, 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_TObjectDrawable
#define ROOT7_TObjectDrawable
 
#include <ROOT/RDrawable.hxx>
#include <ROOT/RAttrValue.hxx>
#include <ROOT/RAttrLine.hxx>
#include <ROOT/RAttrText.hxx>
#include <ROOT/RAttrMarker.hxx>
#include <ROOT/RAttrFill.hxx>
 
class TObject;
class TColor;
class TClass;
 
namespace ROOT {
namespace Experimental {
 
class RPadBase;
class TObjectDisplayItem;
 
/** \class TObjectDrawable
\ingroup GpadROOT7
\brief Provides v7 drawing facilities for TObject types (TGraph, TH1, TH2, etc).
\author Sergey Linev
\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 TObjectDrawable final : public RDrawable {
private:
 
   enum {
      kNone = 0,     ///< empty container
      kObject = 1,   ///< plain object
   };
 
   int fKind{kNone};                           ///< object kind
   Internal::RIOShared<TObject> fObj;          ///< The object to be painted, owned by the drawable
   const TObject *fExtObj{nullptr};            ///<! external object, managed outside of the drawable, not persistent
 
   static std::string GetColorCode(TColor *col);
 
   std::unique_ptr<TObject> CreateSpecials(int kind);
 
protected:
 
   void CollectShared(Internal::RIOSharedVector_t &vect) final { vect.emplace_back(&fObj); }
 
   std::unique_ptr<RDisplayItem> Display(const RDisplayContext &) override;
 
   void PopulateMenu(RMenuItems &) final;
 
   void Execute(const std::string &) final;
 
   static void ExtractObjectColors(std::unique_ptr<TObjectDisplayItem> &item, const TObject *obj);
 
   static void CheckOwnership(TObject *obj);
 
   static const char *DetectCssType(const TObject *obj);
 
public:
   // special kinds, see TWebSnapshot enums
   enum EKind {
      kColors = 4,   ///< list of ROOT colors
      kStyle = 5,    ///< instance of TStyle object
      kPalette = 6   ///< list of colors from palette
   };
 
   RAttrLine line{this, "line"};          ///<! object line attributes
   RAttrFill fill{this, "fill"};          ///<! object fill attributes
   RAttrMarker marker{this, "marker"};    ///<! object marker attributes
   RAttrText text{this, "text"};          ///<! object text attributes
   RAttrValue<std::string> options{this, "options"};  ///<! object draw options
 
   TObjectDrawable();
   TObjectDrawable(TObject *obj, bool isowner = false);
   TObjectDrawable(TObject *obj, const std::string &opt, bool isowner = false);
   TObjectDrawable(const std::shared_ptr<TObject> &obj);
   TObjectDrawable(const std::shared_ptr<TObject> &obj, const std::string &opt);
   TObjectDrawable(EKind kind, bool persistent = false);
   ~TObjectDrawable() override;
 
   void Reset();
 
   void Set(TObject *obj, bool isowner = false);
   void Set(TObject *obj, const std::string &opt, bool isowner = false);
 
   const TObject *Get();
};
 
} // namespace Experimental
} // namespace ROOT
 
 
#endif