os_factory.hpp

video linux conference

/*****************************************************************************
 * os_factory.hpp
 *****************************************************************************
 * Copyright (C) 2003 VideoLAN
 * $Id: os_factory.hpp 8116 2004-07-04 22:22:10Z adn $
 *
 * Authors: Cyril Deguet     <[e-mail]>
 *          Olivier Teuli鑢e <[e-mail]>
 *
 * 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 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

#ifndef OS_FACTORY_HPP
#define OS_FACTORY_HPP

#include "skin_common.hpp"
#include "../utils/position.hpp"
#include <string>
#include <list>

class GenericWindow;
class OSBitmap;
class OSGraphics;
class OSLoop;
class OSWindow;
class OSTooltip;
class OSTimer;


/// Abstract factory used to instantiate OS specific objects.
class OSFactory: public SkinObject
{
    public:
        typedef enum
        {
            kDefaultArrow,
            kResizeNS,
            kResizeWE,
            kResizeNWSE,
            kResizeNESW
        } CursorType_t;

        /// Initialization method overloaded in derived classes.
        /// It must return false if the init failed.
        virtual bool init() { return true; }

        /// Get the right instance of OSFactory.
        /// Returns NULL if initialization of the concrete factory failed.
        static OSFactory *instance( intf_thread_t *pIntf );

        /// Delete the instance of OSFactory.
        static void destroy( intf_thread_t *pIntf );

        /// Instantiate an object OSGraphics.
        virtual OSGraphics *createOSGraphics( int width, int height ) = 0;

        /// Get the instance of the singleton OSLoop.
        virtual OSLoop *getOSLoop() = 0;

        /// Destroy the instance of OSLoop.
        virtual void destroyOSLoop() = 0;

        ///
        virtual void minimize() = 0;

        /// Instantiate an OSTimer with the given callback
        virtual OSTimer *createOSTimer( const Callback &rCallback ) = 0;

        /// Instantiate an object OSWindow.
        virtual OSWindow *createOSWindow( GenericWindow &rWindow,
                                          bool dragDrop, bool playOnDrop,
                                          OSWindow *pParent ) = 0;

        /// Instantiate an object OSTooltip.
        virtual OSTooltip *createOSTooltip() = 0;

        /// Get the directory separator
        virtual const string &getDirSeparator() const = 0;

        /// Get the resource path
        virtual const list<string> &getResourcePath() const = 0;

        /// Get the screen size
        virtual int getScreenWidth() const = 0;
        virtual int getScreenHeight() const = 0;

        /// Get the work area (screen area without taskbars)
        virtual Rect getWorkArea() const = 0;

        /// Get the position of the mouse
        virtual void getMousePos( int &rXPos, int &rYPos ) const = 0;

        /// Change the cursor
        virtual void changeCursor( CursorType_t type ) const = 0;

        /// Delete a directory recursively
        virtual void rmDir( const string &rPath ) = 0;

   protected:
        // Protected because it's a singleton.
        OSFactory( intf_thread_t* pIntf ): SkinObject( pIntf ) {}
        virtual ~OSFactory() {}
};


#endif