/* ============================================================
 *
 * This file is a part of kipi-plugins project
 * http://www.kipi-plugins.org
 *
 * Date        : 2007-11-11
 * Description : a kipi plugin to slide images.
 *
 * Copyright (C) 2007 by Valerio Fuoglio <valerio dot fuoglio at gmail dot com>
 *
 * This program is free software; you can redistribute it
 * and/or modify it under the terms of the GNU General
 * Public License as published by the Free Software Foundation;
 * either version 2, 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 General Public License for more details.
 *
 * ============================================================ */

#ifndef SLIDESHOWLOADER_H
#define SLIDESHOWLOADER_H

// QT includes

#include <qmap.h>
#include <qmutex.h>
#include <qimage.h>
#include <qpixmap.h>
#include <qthread.h>
#include <qvaluelist.h>
#include <qpair.h>

// KDE includes

#include <kurl.h>

typedef QPair<QString, int> FileAnglePair;
typedef QValueList<FileAnglePair> FileList;

namespace KIPISlideShowPlugin
{

  typedef QMap<KURL, QImage> LoadedImages;
  
  class LoadThread : public QThread
  {

    public:

      LoadThread(LoadedImages* loadedImages, QMutex* imageLock, const KURL path, 
                 const int angle, int width, int height);
      ~LoadThread();

    protected:

      void run();

    private:

      QMutex*   m_imageLock;
      LoadedImages* m_loadedImages;

      KURL      m_path;
      QString   m_filename;
      int       m_angle;
      int       m_swidth;
      int       m_sheight;
  };
  
  typedef QMap<KURL, LoadThread*> LoadingThreads;
  
  class SlideShowLoader
  {

    public: 

      SlideShowLoader(FileList &pathList, uint cacheSize, int width, int height, int beginAtIndex=0);
      ~SlideShowLoader();
      
      void next();
      void prev();
      
      QImage getCurrent();
      QString currFileName();
      KURL    currPath();
      
    private:

      void checkIsIn(int index); 
      
      LoadingThreads* m_loadingThreads;
      LoadedImages* m_loadedImages;
      FileList m_pathList;
  
      QMutex* m_imageLock;
      QMutex* m_threadLock;
      
      uint m_cacheSize;
      int m_currIndex;
      int m_swidth;
      int m_sheight;
  };

}  // NameSpace KIPISlideShowPlugin

#endif // SLIDESHOWLOADER_H