source: GTP/trunk/Lib/Geom/OgreStuff/include/CEGUI/CEGUIFactoryModule.h @ 1809

/************************************************************************
        filename:       CEGUIFactoryModule.h
        created:        12/4/2004
        author:         Paul D Turner
        
        purpose:        Defines interface for object that controls a loadable
                                module (.dll/.so/ whatever) that contains concrete
                                window / widget implementations and their factories.
*************************************************************************/
/*************************************************************************
    Crazy Eddie's GUI System (http://www.cegui.org.uk)
    Copyright (C)2004 - 2005 Paul D Turner (paul@cegui.org.uk)

    This library 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 2.1 of the License, or (at your option) any later version.

    This library 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 library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*************************************************************************/
#ifndef _CEGUIFactoryModule_h_
#define _CEGUIFactoryModule_h_

/*************************************************************************
        The following is basically taken from DynLib.h, which is part of
        the Ogre project (http://www.ogre3d.org/)
*************************************************************************/
#if defined(__WIN32__) || defined(_WIN32)
#    define DYNLIB_HANDLE hInstance
#    define DYNLIB_LOAD( a ) LoadLibrary( a )
#    define DYNLIB_GETSYM( a, b ) GetProcAddress( a, b )
#    define DYNLIB_UNLOAD( a ) !FreeLibrary( a )

        struct HINSTANCE__;
        typedef struct HINSTANCE__* hInstance;

#elif defined(__linux__)
#    define DYNLIB_HANDLE void*
#    define DYNLIB_LOAD( a ) dlopen( a, RTLD_LAZY )
#    define DYNLIB_GETSYM( a, b ) dlsym( a, b )
#    define DYNLIB_UNLOAD( a ) dlclose( a )
#    define DYNLIB_ERROR( ) dlerror( )

#elif defined(__APPLE_CC__)
#    define DYNLIB_HANDLE CFBundleRef
#    define DYNLIB_LOAD( a ) mac_loadExeBundle( a )
#    define DYNLIB_GETSYM( a, b ) mac_getBundleSym( a, b )
#    define DYNLIB_UNLOAD( a ) mac_unloadExeBundle( a )
#    define DYNLIB_ERROR( ) mac_errorBundle()
#endif


// Start of CEGUI namespace section
namespace CEGUI
{

/*!
\brief
        Class that encapsulates access to a dynamic loadable module containing implementations of Windows, Widgets, and their factories.
*/
class FactoryModule
{
public:
        /*!
        \brief
                Construct the FactoryModule object by loading the dynamic loadable module specified.

        \param filename
                String object holding the filename of a loadable module.

        \return
                Nothing
        */
        FactoryModule(const String& filename);


        /*!
        \brief
                Destroys the FactoryModule object and unloads any loadable module.

        \return
                Nothing
        */
        virtual ~FactoryModule(void);


        /*!
        \brief
                Register a WindowFactory for \a type Windows.

        \param type
                String object holding the name of the Window type a factory is to be registered for.

        \return
                Nothing.
        */
        void    registerFactory(const String& type) const;


    /*!
    \brief
        Register all factories available in this module.

    \return
        uint value indicating the number of factories registered.
    */
    uint registerAllFactories() const;

private:
    /*!
    \brief
        Return a String containing the last failure message from the platforms
        dynamic loading system.
    */
    String getFailureString() const;

        /*************************************************************************
                Implementation Data
        *************************************************************************/
        static const char       RegisterFactoryFunctionName[];
    static const char   RegisterAllFunctionName[];

        typedef void (*FactoryRegisterFunction)(const String&); 
    typedef uint (*RegisterAllFunction)(void);

        FactoryRegisterFunction d_regFunc;      //!< Pointer to the function called to register factories.
    RegisterAllFunction d_regAllFunc;   //!< Pointer to a function called to register all factories in a module.
        String                  d_moduleName;           //!< Holds the name of the loaded module.
        DYNLIB_HANDLE   d_handle;                       //!< Pointer to a ImplDat derived class that can hold any required implementation data
};

} // End of  CEGUI namespace section


#endif  // end of guard _CEGUIFactoryModule_h_