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

