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

 * 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 "adwaitabusyindicatorengine.h"

#include "adwaita.h"

#include <QVariant>

namespace Adwaita

{

    //_______________________________________________

    BusyIndicatorEngine::BusyIndicatorEngine( QObject* object ):

        BaseEngine( object )

    {}

    //_______________________________________________

    bool BusyIndicatorEngine::registerWidget( QObject* object )

    {

        // check widget validity

        if( !object ) return false;

         // create new data class

        if( !_data.contains( object ) )

        {

            _data.insert( object, new BusyIndicatorData( this ) );

            // connect destruction signal

            connect( object, SIGNAL(destroyed(QObject*)), this, SLOT(unregisterWidget(QObject*)), Qt::UniqueConnection );

        }

        return true;

    }

    //____________________________________________________________

    bool BusyIndicatorEngine::isAnimated( const QObject* object )

    {

        DataMap<BusyIndicatorData>::Value data( BusyIndicatorEngine::data( object ) );

        return data && data.data()->isAnimated();

    }

    //____________________________________________________________

    void BusyIndicatorEngine::setDuration( int value )

    {

        if( duration() == value ) return;

        BaseEngine::setDuration( value );

        // restart timer with specified time

        if( _animation )

        { _animation.data()->setDuration( value ); }

    }

    //____________________________________________________________

    void BusyIndicatorEngine::setAnimated( const QObject* object, bool value )

    {

        DataMap<BusyIndicatorData>::Value data( BusyIndicatorEngine::data( object ) );

        if( data )

        {

            // update data

            data.data()->setAnimated( value );

            // start timer if needed

            if( value )

            {

                if( !_animation )

                {

                    // create animation if not already there

                    _animation = new Animation( duration(), this );

                    // setup

                    _animation.data()->setStartValue( 0.0 );

                    _animation.data()->setEndValue( 100.0 );

                    _animation.data()->setTargetObject( this );

                    _animation.data()->setPropertyName( "value" );

                    _animation.data()->setLoopCount( -1 );

                    _animation.data()->setDuration( duration() * 3);

                }

                // start if  not already running

                if( !_animation.data()->isRunning() )

                { _animation.data()->start(); }

            }

        }

        return;

    }

    //____________________________________________________________

    DataMap<BusyIndicatorData>::Value BusyIndicatorEngine::data( const QObject* object )

    { return _data.find( object ).data(); }

    //_______________________________________________

    void BusyIndicatorEngine::setValue( int value )

    {

        // update

        _value = value;

        bool animated( false );

        // loop over objects in map

        for( DataMap<BusyIndicatorData>::iterator iter = _data.begin(); iter != _data.end(); ++iter )

        {

            if( iter.value().data()->isAnimated() )

            {

                // update animation flag

                animated = true;

                // emit update signal on object

                if( const_cast<QObject*>( iter.key() )->inherits( "QQuickStyleItem" ))

                {

                    //QtQuickControls "rerender" method is updateItem

                    QMetaObject::invokeMethod( const_cast<QObject*>( iter.key() ), "updateItem", Qt::QueuedConnection);

                } else {

                    QMetaObject::invokeMethod( const_cast<QObject*>( iter.key() ), "update", Qt::QueuedConnection);

                }

            }

        }

        if( _animation && !animated )

        {

            _animation.data()->stop();

            _animation.data()->deleteLater();

            _animation.clear();

        }

    }

    //__________________________________________________________

    bool BusyIndicatorEngine::unregisterWidget( QObject* object )

    {

        bool removed( _data.unregisterWidget( object ) );

        if( _animation && _data.isEmpty() )

        {

            _animation.data()->stop();

            _animation.data()->deleteLater();

            _animation.clear();

        }

        return removed;

    }

}