RootGraphicsEnablingService.h

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#ifndef UTILITIES_ROOTGRAPHICS_ROOTGRAPHICSENABLINGSERVICE_H
#define UTILITIES_ROOTGRAPHICS_ROOTGRAPHICSENABLINGSERVICE_H

// framework libraries
#include "art/Framework/Services/Registry/ServiceDeclarationMacros.h"
#include "art/Framework/Services/Registry/ServiceDefinitionMacros.h"

namespace fhicl { class ParameterSet; }
namespace art { class ActivityRegistry; }
namespace util {
    /**
    * @brief Trojan service to inject initialization code
    *
    * Run this service to ensure that a graphical (interactive) ROOT session
    * can be initialized (e.g., for TEve-based visualization.
    * Just add it to the services in your FHiCL configuration file with e.g.,
    *
    *     services.RootGraphicsEnablingService: {}
    *
    *
    * This service does very much nothing.
    * But it is linked to the RootGraphicsEnabler library that does magics on loading.
    *
    * Configuration parameters
    * =========================
    *
    * No configuration.
    *
    */
    class RootGraphicsEnablingService {
    public:
        RootGraphicsEnablingService(fhicl::ParameterSet const&, art::ActivityRegistry&) {}
    }; // class RootGraphicsEnablingService
} // namespace util

DECLARE_ART_SERVICE(util::RootGraphicsEnablingService, LEGACY)

#endif // UTILITIES_ROOTGRAPHICS_ROOTGRAPHICSENABLINGSERVICE_H