/**
 * Stone of Orthanc
 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
 * Department, University Hospital of Liege, Belgium
 * Copyright (C) 2017-2022 Osimis S.A., Belgium
 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
 *
 * This program is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Lesser 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program. If not, see
 * <http://www.gnu.org/licenses/>.
 **/


#pragma once

#include "IViewport.h"

namespace OrthancStone
{
  class ViewportLocker : public boost::noncopyable
  {
  private:
    boost::shared_ptr<IViewport>       lock1_;
    std::unique_ptr<IViewport::ILock>  lock2_;

    IViewport::ILock& GetLock() const;

  public:
    explicit ViewportLocker(IViewport& viewport) :
      lock2_(viewport.Lock())
    {
    }

    explicit ViewportLocker(boost::weak_ptr<IViewport> viewport);

    bool IsValid() const
    {
      return (lock2_.get() != NULL);
    }

    ViewportController& GetController() const
    {
      return GetLock().GetController();
    }

    void Invalidate() const
    {
      return GetLock().Invalidate();
    }
  };
}