//=============================================================================
//
//                               OpenFlipper
//        Copyright (C) 2008 by Computer Graphics Group, RWTH Aachen
//                           www.openflipper.org
//
//-----------------------------------------------------------------------------
//
//                                License
//
//  OpenFlipper 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.
//
//  OpenFlipper 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 OpenFlipper.  If not, see <http://www.gnu.org/licenses/>.
//
//-----------------------------------------------------------------------------
//
//   $Revision$
//   $Author$
//   $Date$
//
//=============================================================================




//
// C++ Interface: BasePlugin
//
// Description:
//
//
// Author: Jan Moebius <jan_moebius@web.de>, (C) 2007
//

#ifndef FILEINTERFACE_HH
#define FILEINTERFACE_HH

 #include <QtGui>
 #include <OpenFlipper/common/Types.hh>

 /** \brief Interface class for file and object handling
  *
  * This interface class has to be fully implemented. When you want to support save and load
  * for an object type you have to implement all functions in this class. The core manages the
  * load and save interaction and gives the load and save actions to your plugin. The decision
  * which plugin is called for saving an object depends on your supportedTypes() and the filters
  * defined by your plugin.
 */

class FileInterface {

//===========================================================================
/** @name Widgets
* @{ */
//===========================================================================
  public :

    /** You can provide a special widget showing options for saving your file types
      *  depending on the current filter
      *
      *  _currentFilter: one filter from saveFilters
      *
      *  Return 0 when you dont need one
      */
    virtual QWidget* saveOptionsWidget(QString /*_currentFilter*/) = 0;

    /** You can provide a special widget showing options for loading your file types
      *  depending on the current filter
      *
      *  _currentFilter: one filter from loadFilters
      *
      *  Return 0 when you dont need one
      */
    virtual QWidget* loadOptionsWidget(QString /*_currentFilter*/) = 0;
}

//===========================================================================
/** @name Supported types
* @{ */
//===========================================================================

public:

  /** Return the name of your supported type (e.g. "Triangle Mesh"
   */
  virtual QString typeName() = 0;

  /** Return your supported object type( e.g. DATA_TRIANGLE_MESH )
   *
   * TODO : Support for adding new datatypes at runtime
   */
  virtual DataType supportedType() = 0;


  /** Return the Qt Filters for Filedialogs when loading files (e.g. "Off files ( *.off )" )
   *
   */
  virtual QString getLoadFilters() = 0;

  /** Get the Qt Filters for Filedialogs when saving files (e.g. "Off files ( *.off )" )
   *
   */
  virtual QString getSaveFilters() = 0;

/** @} */

//===========================================================================
/** @name Load Save Implementation
* @{ */
//===========================================================================

public slots:

      /** \brief Create an empty object
       *
       * When this slot is called you have to create an object of your supported type.
       * @return Id of the new Object
       */
      virtual int addEmpty() = 0;

      /** \brief Load an object from the given file
       *
       * The Core will call this slot if you should load a file. The core will
       * check if you support the given file type depending on the provided
       * filters and dataTypes ( see supportedType and getLoadFilters )
       */
      virtual int loadObject(QString /*_filename*/) = 0;

      /** \brief Save an object from the given file
       *
       * The Core will call this slot if you should save an object to a file.
       * The core will check if you support the given object depending on the
       * provided dataTypes ( see supportedType ).
       * Additionally to the filename you get the id of the object to save
       */
      virtual bool saveObject(int /*_id*/, QString /*_filename*/) = 0;

/** @} */

};

Q_DECLARE_INTERFACE(FileInterface,"OpenFlipper.FileInterface/0.3")

#endif // FILEINTERFACE_HH