#ifndef adwaitawidgetstateengine_h

#define adwaitawidgetstateengine_h

/*************************************************************************

 * Copyright (C) 2014 by Hugo Pereira Da Costa <hugo.pereira@free.fr>    *

 *                                                                       *

 * 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.,                                       *

 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA .        *

 *************************************************************************/

#include "adwaita.h"

#include "adwaitabaseengine.h"

#include "adwaitadatamap.h"

#include "adwaitawidgetstatedata.h"

namespace Adwaita

{

    //* used for simple widgets

    class WidgetStateEngine: public BaseEngine

    {

        Q_OBJECT

        public:

        //* constructor

        explicit WidgetStateEngine( QObject* parent ):

            BaseEngine( parent )

        {}

        //* destructor

        virtual ~WidgetStateEngine( void )

        {}

        //* register widget

        virtual bool registerWidget( QWidget*, AnimationModes );

        //* returns registered widgets

        virtual WidgetList registeredWidgets( AnimationModes ) const;

        using BaseEngine::registeredWidgets;

        //* true if widget hover state is changed

        virtual bool updateState( const QObject*, AnimationMode, bool );

        //* true if widget is animated

        virtual bool isAnimated( const QObject*, AnimationMode );

        //* animation opacity

        virtual qreal opacity( const QObject* object, AnimationMode mode )

        { return isAnimated( object, mode ) ? data( object, mode ).data()->opacity(): AnimationData::OpacityInvalid; }

        //* animation mode

        /** precedence on focus */

        virtual AnimationMode frameAnimationMode( const QObject* object )

        {

            if( isAnimated( object, AnimationEnable ) ) return AnimationEnable;

            else if( isAnimated( object, AnimationFocus ) ) return AnimationFocus;

            else if( isAnimated( object, AnimationHover ) ) return AnimationHover;

            else return AnimationNone;

        }

        //* animation opacity

        /** precedence on focus */

        virtual qreal frameOpacity( const QObject* object )

        {

            if( isAnimated( object, AnimationEnable ) ) return data( object, AnimationEnable ).data()->opacity();

            else if( isAnimated( object, AnimationFocus ) ) return data( object, AnimationFocus ).data()->opacity();

            else if( isAnimated( object, AnimationHover ) ) return data( object, AnimationHover ).data()->opacity();

            else return AnimationData::OpacityInvalid;

        }

        //* animation mode

        /** precedence on mouseOver */

        virtual AnimationMode buttonAnimationMode( const QObject* object )

        {

            if( isAnimated( object, AnimationEnable ) ) return AnimationEnable;

            else if( isAnimated( object, AnimationPressed ) ) return AnimationPressed;

            else if( isAnimated( object, AnimationHover ) ) return AnimationHover;

            else if( isAnimated( object, AnimationFocus ) ) return AnimationFocus;

            else return AnimationNone;

        }

        //* animation opacity

        /** precedence on mouseOver */

        virtual qreal buttonOpacity( const QObject* object )

        {

            if( isAnimated( object, AnimationEnable ) ) return data( object, AnimationEnable ).data()->opacity();

            else if( isAnimated( object, AnimationPressed ) ) return data( object, AnimationPressed ).data()->opacity();

            else if( isAnimated( object, AnimationHover ) ) return data( object, AnimationHover ).data()->opacity();

            else if( isAnimated( object, AnimationFocus ) ) return data( object, AnimationFocus ).data()->opacity();

            else return AnimationData::OpacityInvalid;

        }

        //* duration

        virtual void setEnabled( bool value )

        {

            BaseEngine::setEnabled( value );

            _hoverData.setEnabled( value );

            _focusData.setEnabled( value );

            _enableData.setEnabled( value );

            _pressedData.setEnabled( value );

        }

        //* duration

        virtual void setDuration( int value )

        {

            BaseEngine::setDuration( value );

            _hoverData.setDuration( value );

            _focusData.setDuration( value );

            _enableData.setDuration( value );

            _pressedData.setDuration( value/2 );

        }

        public Q_SLOTS:

        //* remove widget from map

        virtual bool unregisterWidget( QObject* object )

        {

            if( !object ) return false;

            bool found = false;

            if( _hoverData.unregisterWidget( object ) ) found = true;

            if( _focusData.unregisterWidget( object ) ) found = true;

            if( _enableData.unregisterWidget( object ) ) found = true;

            if( _pressedData.unregisterWidget( object ) ) found = true;

            return found;

        }

        protected:

        //* returns data associated to widget

        DataMap<WidgetStateData>::Value data( const QObject*, AnimationMode );

        //* returns data map associated to animation mode

        DataMap<WidgetStateData>& dataMap( AnimationMode );

        private:

        //* maps

        DataMap<WidgetStateData> _hoverData;

        DataMap<WidgetStateData> _focusData;

        DataMap<WidgetStateData> _enableData;

        DataMap<WidgetStateData> _pressedData;

    };

}

#endif