RDisplayItem.hxx

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/*************************************************************************
 * Copyright (C) 1995-2019, 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_RDisplayItem
#define ROOT7_RDisplayItem
 
#include <string>
 
namespace ROOT {
namespace Experimental {
 
class RDrawable;
class RStyle;
class RAttrMap;
 
/** \class RDisplayItem
\ingroup GpadROOT7
\brief Base class for painting data for JS.
\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 RDisplayItem {
protected:
   std::string fObjectID;   ///< unique object identifier
   RStyle *fStyle{nullptr}; ///< style object
   unsigned fIndex{0};      ///<! index inside current pad, used to produce fully-qualified id, not send to client
   bool fDummy{false};      ///< if true, just placeholder for drawable which does not changed
 
public:
   RDisplayItem() = default;
   RDisplayItem(bool dummy) : RDisplayItem() { fDummy = dummy; }
   virtual ~RDisplayItem() {}
 
   void SetObjectID(const std::string &id) { fObjectID = id; }
   std::string GetObjectID() const { return fObjectID; }
 
   void SetObjectIDAsPtr(const void *ptr);
 
   void SetStyle(RStyle *style) { fStyle = style; }
 
   void SetIndex(unsigned indx) { fIndex = indx; }
   unsigned GetIndex() const { return fIndex; }
 
   virtual void BuildFullId(const std::string &prefix);
 
   static std::string ObjectIDFromPtr(const void *ptr);
};
 
 
/** \class RDrawableDisplayItem
\ingroup GpadROOT7
\brief Generic display item for RDrawable, just reference drawable itself
\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 RDrawableDisplayItem : public RDisplayItem {
protected:
 
   const RDrawable *fDrawable{nullptr};        ///< drawable
 
public:
 
   template <class DRAWABLE>
   RDrawableDisplayItem(const DRAWABLE &dr)
   {
      fDrawable = &dr;
   }
 
   const RDrawable *GetDrawable() const { return fDrawable; }
 
   ~RDrawableDisplayItem() override;
 
};
 
 
/** \class RIndirectDisplayItem
\ingroup GpadROOT7
\brief Extract (reference) only basic attributes from drawable, but not drawable itself
\author Sergey Linev <s.linev@gsi.de>
\date 2020-04-02
\warning This is part of the ROOT 7 prototype! It will change without notice. It might trigger earthquakes. Feedback is welcome!
*/
 
class RIndirectDisplayItem : public RDisplayItem {
protected:
 
   const RAttrMap *fAttr{nullptr};        ///< pointer on drawable attributes
   const std::string *fCssClass{nullptr}; ///< pointer on drawable class
   const std::string *fId{nullptr};       ///< pointer on drawable id
 
public:
 
   RIndirectDisplayItem() = default;
 
   RIndirectDisplayItem(const RDrawable &dr);
};
 
} // namespace Experimental
} // namespace ROOT
 
#endif