/**
 * Stone of Orthanc
 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
 * Department, University Hospital of Liege, Belgium
 * Copyright (C) 2017-2018 Osimis S.A., Belgium
 *
 * This program is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License
 * as published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 **/


#pragma once

#include "ILayerSource.h"
#include "../Toolbox/ObserversRegistry.h"
#include <boost/signals2.hpp>
#include <boost/shared_ptr.hpp>

namespace OrthancStone
{
  class LayerSourceBase : public ILayerSource
  {
  private:
    //typedef ObserversRegistry<ILayerSource, IObserver>  Observers;

    //Observers  observers_;

  protected:
    void NotifyGeometryReady();
    
    void NotifyGeometryError();

    void NotifyContentChange();

    void NotifySliceChange(const Slice& slice);

    void NotifyLayerReady(boost::shared_ptr<ILayerRenderer> renderer,
                          const CoordinateSystem3D& slice,
                          bool isError);

  public:
    virtual void Register(boost::shared_ptr<IObserver> observer);

  protected:
    typedef boost::signals2::signal<void (const ILayerSource& source)> SignalGeometryReadyType;
    typedef boost::signals2::signal<void (const ILayerSource& source)> SignalGeometryErrorType;
    typedef boost::signals2::signal<void (const ILayerSource& source)> SignalContentChangeType;
    typedef boost::signals2::signal<void (const ILayerSource& source,
                                  const Slice& slice)> SignalSliceChangeType;
    typedef boost::signals2::signal<void (boost::shared_ptr<ILayerRenderer> renderer,
                                  const ILayerSource& source,
                                  const CoordinateSystem3D& slice,
                                  bool isError)> SignalLayerReadyType;

    SignalGeometryReadyType SignalGeometryReady;
    SignalGeometryErrorType SignalGeometryError;
    SignalContentChangeType SignalContentChange;
    SignalSliceChangeType SignalSliceChange;
    SignalLayerReadyType SignalLayerReady;


    //boost::signals2::signal<void (const ILayerSource& source)> SignalGeometryError;

  };
}