/*
 * Bittorrent Client using Qt and libtorrent.
 * Copyright (C) 2014  Ivan Sorokin <vanyacpp@gmail.com>
 *
 * 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.
 *
 * In addition, as a special exception, the copyright holders give permission to
 * link this program with the OpenSSL project's "OpenSSL" library (or with
 * modified versions of it that use the same license as the "OpenSSL" library),
 * and distribute the linked executables. You must obey the GNU General Public
 * License in all respects for all of the code used other than "OpenSSL".  If you
 * modify file(s), you may extend this exception to your version of the file(s),
 * but you are not obligated to do so. If you do not wish to do so, delete this
 * exception statement from your version.
 */

#include "torrentcontenttreeview.h"

#include <QHeaderView>
#include <QKeyEvent>
#include <QModelIndexList>
#include <QTableView>

#include "torrentcontentmodelitem.h"

TorrentContentTreeView::TorrentContentTreeView(QWidget *parent)
    : QTreeView(parent)
{
    // This hack fixes reordering of first column with Qt5.
    // https://github.com/qtproject/qtbase/commit/e0fc088c0c8bc61dbcaf5928b24986cd61a22777
    QTableView unused;
    unused.setVerticalHeader(header());
    header()->setParent(this);
    header()->setStretchLastSection(false);
    unused.setVerticalHeader(new QHeaderView(Qt::Horizontal));
}

void TorrentContentTreeView::keyPressEvent(QKeyEvent *event)
{
    if ((event->key() != Qt::Key_Space) && (event->key() != Qt::Key_Select)) {
        QTreeView::keyPressEvent(event);
        return;
    }

    event->accept();

    QModelIndex current = currentNameCell();

    QVariant value = current.data(Qt::CheckStateRole);
    if (!value.isValid()) {
        Q_ASSERT(false);
        return;
    }

    Qt::CheckState state = (static_cast<Qt::CheckState>(value.toInt()) == Qt::Checked
                            ? Qt::Unchecked : Qt::Checked);

    const QModelIndexList selection = selectionModel()->selectedRows(TorrentContentModelItem::COL_NAME);

    for (const QModelIndex &index : selection) {
        Q_ASSERT(index.column() == TorrentContentModelItem::COL_NAME);
        model()->setData(index, state, Qt::CheckStateRole);
    }
}

QModelIndex TorrentContentTreeView::currentNameCell()
{
    QModelIndex current = currentIndex();
    if (!current.isValid()) {
        Q_ASSERT(false);
        return {};
    }

    return model()->index(current.row(), TorrentContentModelItem::COL_NAME, current.parent());
}