/*************************************************************************
 * 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() 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);
    }
}

} // namespace Adwaita
