RDisplayItem.cxx

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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.             *
 *************************************************************************/

#include "ROOT/RDisplayItem.hxx"

#include "ROOT/RDrawable.hxx"

#include "TString.h"

////////////////////////////////////////////////////////////////////////////
/// Assign id using arbitrary pointer value
/// Typically drawable pointer should be used here

void ROOT::Experimental::RDisplayItem::SetObjectIDAsPtr(const void *ptr)
{
   SetObjectID(ObjectIDFromPtr(ptr));
}

void ROOT::Experimental::RDisplayItem::BuildFullId(const std::string &prefix)
{
   SetObjectID(prefix + std::to_string(GetIndex()) + "_" + GetObjectID());
}

std::string ROOT::Experimental::RDisplayItem::ObjectIDFromPtr(const void *ptr)
{
   auto hash = TString::Hash(&ptr, sizeof(ptr));
   return std::to_string(hash);
}