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

 * 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 .        *

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

//////////////////////////////////////////////////////////////////////////////

// adwaitaheaderviewdata.cpp

// data container for QHeaderView animations

// -------------------

//

// Copyright (c) 2009 Hugo Pereira Da Costa <hugo.pereira@free.fr>

//

// 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 OR COPYRIGHT HOLDERS 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.

//////////////////////////////////////////////////////////////////////////////

#include "adwaitaheaderviewdata.h"

#include <QHoverEvent>

#include <QTextStream>

namespace Adwaita

{

    //______________________________________________

    HeaderViewData::HeaderViewData( QObject* parent, QWidget* target, int duration ):

        AnimationData( parent, target )

    {

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

        setupAnimation( currentIndexAnimation(), "currentOpacity" );

        currentIndexAnimation().data()->setDirection( Animation::Forward );

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

        setupAnimation( previousIndexAnimation(), "previousOpacity" );

        previousIndexAnimation().data()->setDirection( Animation::Backward );

    }

    //______________________________________________

    bool HeaderViewData::updateState( const QPoint& position , bool hovered )

    {

        if( !enabled() ) return false;

        const QHeaderView* local( qobject_cast<const QHeaderView*>( target().data() ) );

        if( !local ) return false;

        int index( local->logicalIndexAt( position ) );

        if( index < 0 ) return false;

        if( hovered )

        {

            if( index != currentIndex() )

            {

                if( currentIndex() >= 0 )

                {

                    setPreviousIndex( currentIndex() );

                    setCurrentIndex( -1 );

                    previousIndexAnimation().data()->restart();

                }

                setCurrentIndex( index );

                currentIndexAnimation().data()->restart();

                return true;

            } else return false;

        } else if( index == currentIndex() ) {

            setPreviousIndex( currentIndex() );

            setCurrentIndex( -1 );

            previousIndexAnimation().data()->restart();

            return true;

        } else return false;

    }

    //______________________________________________

    Animation::Pointer HeaderViewData::animation( const QPoint& position ) const

    {

        if( !enabled() )  return Animation::Pointer();

        const QHeaderView* local( qobject_cast<const QHeaderView*>( target().data() ) );

        if( !local ) return Animation::Pointer();

        int index( local->logicalIndexAt( position ) );

        if( index < 0 ) return Animation::Pointer();

        else if( index == currentIndex() ) return currentIndexAnimation();

        else if( index == previousIndex() ) return previousIndexAnimation();

        else return Animation::Pointer();

    }

    //______________________________________________

    qreal HeaderViewData::opacity( const QPoint& position ) const

    {

        if( !enabled() ) return OpacityInvalid;

        const QHeaderView* local( qobject_cast<const QHeaderView*>( target().data() ) );

        if( !local ) return OpacityInvalid;

        int index( local->logicalIndexAt( position ) );

        if( index < 0 ) return OpacityInvalid;

        else if( index == currentIndex() ) return currentOpacity();

        else if( index == previousIndex() ) return previousOpacity();

        else return OpacityInvalid;

    }

    //__________________________________________________________

    void HeaderViewData::setDirty( void ) const

    {

        QHeaderView* header = qobject_cast<QHeaderView*>( target().data() );

        if( !header ) return;

        // get first and last index, sorted

        int lastIndex( qMax( previousIndex(), currentIndex() ) );

        if( lastIndex < 0 ) return;

        int firstIndex( qMin( previousIndex(), currentIndex() ) );

        if( firstIndex < 0 ) firstIndex = lastIndex;

        // find relevant rectangle to be updated, in viewport coordinate

        QWidget* viewport( header->viewport() );

        int left = header->sectionViewportPosition( firstIndex );

        int right = header->sectionViewportPosition( lastIndex ) + header->sectionSize( lastIndex );

        // trigger update

        if( header->orientation() == Qt::Horizontal ) viewport->update( left, 0, right-left, header->height() );

        else viewport->update( 0, left, header->width(), right-left );

    }

}