gelGameState.h

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/*
Gel2D Game Engine - Cross-platform 2D gaming middleware
Copyright (C) 2011 Mark D. Procarione

Gel2D 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 3 of the License, or
(at your option) any later version.

Gel2D 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.
*/

#ifndef __GELGAMESTATE_H__
#define __GELGAMESTATE_H__

#include "gelLinkedList.h"
#include "gelEvent.h"

namespace gel
{

    class GelGameState : public GelEventReceiver
    {
        public:
            GelGameState();
            virtual ~GelGameState() {}

            virtual void init() = 0;
            virtual void cleanup() = 0;

            virtual void pause()  { paused = true; }
            virtual void resume() { paused = false; }

            virtual void restart() = 0;

            virtual void update() = 0;
                        virtual void render() = 0;

                        bool isPaused() { return paused; }

        private:
            bool paused;

    };


    class GelGameStateManager
    {
        public:

            GelGameStateManager() {};


            void addOverlayScene( GelGameState *scn ) { scene.append(scn); }


            void addUnderlayScene( GelGameState *scn ) { scene.prepend(scn); }


            void addScene( GelGameState *scn ) { addOverlayScene(scn); }


            void removeScene( int index ) { scene.remove(index); }

            void updateAll();

            void drawAll();

            void pauseAll();

            void resumeAll();

            void restartAll();


            void updateScene( int index ) { scene[index]->update(); }


            void drawScene( int index ) { scene[index]->render(); }


            void pauseScene( int index ) { scene[index]->pause(); }


            void resumeScene( int index ) { scene[index]->resume(); }


            void restartScene( int index ) { scene[index]->restart(); }

        private:
            GelLinkedList<GelGameState*> scene;
    };
}

#endif // __GELGAMESTATE_H__