/*
 * SPDX-FileCopyrightText: 2009, 2014 Hugo Pereira Da Costa <hugo.pereira@free.fr>
 *
 * SPDX-License-Identifier: GPL-2.0-or-later OR MIT
 */

#include "breezeheaderviewdata.h"

#include <QHoverEvent>
#include <QTextStream>

namespace Breeze
{

    //______________________________________________
    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;

        const 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() const
    {
        QHeaderView* header = qobject_cast<QHeaderView*>( target().data() );
        if( !header ) return;

        // get first and last index, sorted
        const 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() );
        const int left = header->sectionViewportPosition( firstIndex );
        const 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 );

    }

}