/****************************************************************************
 ** Copyright (C) 2001-2006 Klarälvdalens Datakonsult AB.  All rights reserved.
 **
 ** This file is part of the KD Gantt library.
 **
 ** This file may be distributed and/or modified under the terms of the
 ** GNU General Public License version 2 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.GPL included in the
 ** packaging of this file.
 **
 ** Licensees holding valid commercial KD Gantt licenses may use this file in
 ** accordance with the KD Gantt Commercial License Agreement provided with
 ** the Software.
 **
 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 **
 ** See http://www.kdab.net/kdgantt for
 **   information about KD Gantt Commercial License Agreements.
 **
 ** Contact info@kdab.net if any conditions of this
 ** licensing are not clear to you.
 **
 **********************************************************************/
#include "kdganttlistviewrowcontroller.h"
#include "kdganttlistviewrowcontroller_p.h"

#include <QAbstractProxyModel>
#include <QScrollBar>

#include <cassert>

using namespace KDGantt;

/*!\class TreeViewRowController
 * This is an implementation of AbstractRowController that
 * aligns a gantt view with a QListView. Provided for
 * convenience for users who want to use View with QListView
 * instead of QTreeView.
 */

ListViewRowController::ListViewRowController(QListView *lv, QAbstractProxyModel *proxy)
    : _d(new Private(lv, proxy))
{
}

ListViewRowController::~ListViewRowController()
{
    delete _d; _d = 0;
}

#define d d_func()

int ListViewRowController::headerHeight() const
{
    return d->listview->viewport()->y() - d->listview->frameWidth();
}

int ListViewRowController::maximumItemHeight() const
{
    return d->listview->fontMetrics().height();
}

int ListViewRowController::totalHeight() const
{
    return d->listview->verticalScrollBar()->maximum() + d->listview->viewport()->height();
}

bool ListViewRowController::isRowVisible(const QModelIndex &_idx) const
{
    const QModelIndex idx = d->proxy->mapToSource(_idx);
    assert(idx.isValid() ? (idx.model() == d->listview->model()) : (true));
    return d->listview->visualRect(idx).isValid();
}

bool ListViewRowController::isRowExpanded(const QModelIndex &_idx) const
{
    Q_UNUSED(_idx);
    return false;
}

Span ListViewRowController::rowGeometry(const QModelIndex &_idx) const
{
    const QModelIndex idx = d->proxy->mapToSource(_idx);
    assert(idx.isValid() ? (idx.model() == d->listview->model()) : (true));
    QRect r = d->listview->visualRect(idx).translated(QPoint(0,
              static_cast<Private::HackListView *>(d->listview)->verticalOffset()));
    return Span(r.y(), r.height());
}

QModelIndex ListViewRowController::indexAt(int height) const
{
    return d->proxy->mapFromSource(d->listview->indexAt(QPoint(1, height)));
}

QModelIndex ListViewRowController::indexAbove(const QModelIndex &_idx) const
{
    const QModelIndex idx = d->proxy->mapToSource(_idx);
    return d->proxy->mapFromSource(idx.sibling(idx.row() - 1, idx.column()));
}

QModelIndex ListViewRowController::indexBelow(const QModelIndex &_idx) const
{
    const QModelIndex idx = d->proxy->mapToSource(_idx);
    if (!idx.isValid() || idx.column() != 0) {
        return QModelIndex();
    }
    if (idx.model()->rowCount(idx.parent()) < idx.row() + 1) {
        return QModelIndex();
    }
    return d->proxy->mapFromSource(idx.sibling(idx.row() + 1, idx.column()));
}

