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/***********************************************************************
	filename: 	CEGUIWindowFactory.h
	created:	21/2/2004
	author:		Paul D Turner
	
	purpose:	Defines abstract base class for WindowFactory objects
*************************************************************************/
/***************************************************************************
 *   Copyright (C) 2004 - 2006 Paul D Turner & The CEGUI Development Team
 *
 *   Permission is hereby granted, free of charge, to any person obtaining
 *   a copy of this software and associated documentation files (the
 *   "Software"), to deal in the Software without restriction, including
 *   without limitation the rights to use, copy, modify, merge, publish,
 *   distribute, sublicense, and/or sell copies of the Software, and to
 *   permit persons to whom the Software is furnished to do so, subject to
 *   the following conditions:
 *
 *   The above copyright notice and this permission notice shall be
 *   included in all copies or substantial portions of the Software.
 *
 *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 *   IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 *   OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 *   ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 *   OTHER DEALINGS IN THE SOFTWARE.
 ***************************************************************************/
#ifndef _CEGUIWindowFactory_h_
#define _CEGUIWindowFactory_h_

#include "CEGUIBase.h"
#include "CEGUIString.h"
#include "CEGUIWindow.h"

/*!
\brief
    Declares a window factory class.

\param T
    The window class name.

\note
    The class that will be generated is is named <classname>Factory.
    A statement like this:
        CEGUI_DECLARE_WINDOW_FACTORY(MyWidget);
    Would generate a factory class named MyWidgetFactory.

    The factory is automatically instantiated and for the example it would
    be available as:
        WindowFactory* wf = &(getMyWidgetFactory());
    or
        WindowFactory* wf = &CEGUI_WINDOW_FACTORY(MyWidget);
*/
#define CEGUI_DECLARE_WINDOW_FACTORY( T )\
class T ## Factory : public WindowFactory\
{\
public:\
	T ## Factory() : WindowFactory( T::WidgetTypeName ) {}\
    Window* createWindow(const String& name)\
    {\
        return new T (d_type, name);\
    }\
    void destroyWindow(Window* window)\
    {\
        delete window;\
    }\
};\
T ## Factory& get ## T ## Factory();

/*!
\brief
    Generates code for the constructor for the instance of the window factory generated
    from the class name \a T
*/
#define CEGUI_DEFINE_WINDOW_FACTORY( T )\
T ## Factory& get ## T ## Factory()\
{\
	static T ## Factory s_factory;\
	return s_factory;\
}


/*!
\brief
    Helper macro that return the real factory class name from a given class name \a T
*/
#define CEGUI_WINDOW_FACTORY( T ) (get ## T ## Factory())

// Start of CEGUI namespace section
namespace CEGUI
{
/*!
\brief
	Abstract class that defines the required interface for all WindowFactory objects

	A WindowFactory is used to create and destroy windows of a specific type.  For every
	type of Window object wihin the system (widgets, dialogs, movable windows etc) there
	must be an associated WindowFactory registered with the WindowManager so that the system
	knows how to create and destroy those types of Window base object.
*/
class CEGUIEXPORT WindowFactory
{
public:
	/*!
	\brief
		Create a new Window object of whatever type this WindowFactory produces.

	\param name
		A unique name that is to be assigned to the newly created Window object

	\return
		Pointer to the new Window object.
	*/
	virtual	Window*	createWindow(const String& name) = 0;

	/*!
	\brief
		Destroys the given Window object.

	\param window
		Pointer to the Window object to be destroyed.

	\return
		Nothing.
	*/
	virtual void	destroyWindow(Window* window) = 0;

	/*!
	\brief
		Get the string that describes the type of Window object this WindowFactory produces.

	\return
		String object that contains the unique Window object type produced by this WindowFactory
	*/
	const String& getTypeName(void) const		{return d_type;}

protected:
	/*************************************************************************
		Construction and Destruction
	*************************************************************************/
	WindowFactory(const String& type) : d_type(type) {}

public:		// luabind compatibility
	virtual ~WindowFactory(void) {}

protected:
	/*************************************************************************
		Implementation Data
	*************************************************************************/
	String		d_type;		//!< String holding the type of object created by this factory
};

} // End of  CEGUI namespace section

#endif	// end of guard _CEGUIWindowFactory_h_
CEGUIWindowFactory.h
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