guisurface.h

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/********************************************************************************/
/*                                                                              */
/*  Netrinjo-Engine - a library for game-development                            */
/*  Copyright (C) 1999-2006 by Tobias Nadler and Georg Schnattinger             */
/*                                                                              */
/*  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.          */
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/*  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.                             */
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/*  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 GUISURFACE_H
#define GUISURFACE_H

#include "guielement.h"

class TiXmlElement;

class DECLSPEC GuiSurface : public GuiElement
{
public:
    DECLSPEC GuiSurface( const SDL_Rect &r, GuiElement *p, const char *name );
    DECLSPEC GuiSurface( TiXmlElement *el, GuiElement *p );
    virtual DECLSPEC ~GuiSurface();

    virtual const char *getClassName()  { return "GuiSurface"; }

    virtual bool hasSurface() const { return nUnuseCounter == 0; }
    DECLSPEC void incUnuseRef() { if( nUnuseCounter++ == 0 ) setDrawRectDirty(); }
    DECLSPEC void decUnuseRef() { if( nUnuseCounter && --nUnuseCounter == 0 ) setDrawRectDirty(); }

    static void newguiobject(void *presult, BasicObject *o, void *xmldata)
    {
        GuiElement *r = new GuiSurface((TiXmlElement*)xmldata, (GuiElement*)o);
        *(GuiElement**)presult = r;
    }
protected:
    virtual DECLSPEC Uint32 onResize();
    virtual SdlSurface * getDestSurface()   {return surfDest;}
    virtual DECLSPEC void onInit();
    virtual DECLSPEC Uint32 onFrame(SdlSurface *dest);
    virtual void incRequireOnFrame()    {GuiElement::incRequireOnFrame(); incUnuseRef();}
    virtual void decRequireOnFrame()    {GuiElement::decRequireOnFrame(); decUnuseRef();}

private:
    // reference counter
    unsigned int nUnuseCounter;
// Optimization
    // the surface to draw on
    SdlSurface *surfDest;
};

#endif

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